| 601 | 467 | Jun 2015 | Old Bull Trail Road and St. Helena Toll Road | State | Lake | |
| 602 | 450 | Jun 2015 | Stone House | State | Lake | |
| 603 | 428 | Jun 2015 | Sulphur Bank Mine Site | Missing | Lake | |
| 604 | 427 | Jun 2015 | Battle Of Bloody Island | State | Lake | |
| 605 | 547 | Jun 2015 | Chiles Mill Site | State | Napa | |
| 606 | 939.6 | Jun 2015 | Litto's Hubcap Ranch | State | Napa | |
| 607 | 429 | Jun 2015 | Lower Lake Stone Jail | State | Lake | |
| 608 | 926 | Jun 2015 | Sun House | State | Mendocino | |
| 609 | 897 | Jun 2015 | Lake County Courthouse | State | Lake | |
| 610 | 426 | Jun 2015 | Stone And Kelsey Home | State | Lake | |
| 611 | 980 | Jun 2015 | Ukiah Vichy Springs Resort | State | Mendocino | |
| 612 | 683 | Jun 2015 | Hudson Cabin Site | None | Napa | |
| 613 | 207 | Jun 2015 | First Sawmill in Marin County | State | Marin | |
| 614 | 917 | Jun 2015 | Green Brae Brick Kiln | State | Marin | |
| 615 | 922 | Jun 2015 | Outdoor Art Club | State | Marin | |
| 616 | 974 | Jun 2015 | Golden Gate Bridge | Other | Marin | |
| 617 | 974.1 | Jun 2015 | Golden Gate Bridge - San Francisco | None | San Francisco | |
| 618 | 999 | Jun 2015 | Marin County Civic Center | State | Marin | |
| 619 | 924 | Jun 2015 | China Camp | State | Marin | |
| 620 | 630 | Jun 2015 | St. Vincent's School for Boys | State | Marin | |
| 621 | 221 | Jun 2015 | Lighter Wharf at Bolinas Site | None | Marin | |
| 622 | 210 | Jun 2015 | Oldest House North of San Francisco Bay, Camillo Ynitia Adobe | None | Marin | |
| 623 | 392.1 | Jun 2015 | Haraszthy Villa Site | Other | Sonoma | |
| 624 | 552 | Jun 2015 | Pioneer Paper Mill | State | Marin | |
| 625 | 222 | Jun 2015 | Olema Lime Kilns | None | Marin | |
| 626 | 679 | Jun 2015 | Home of Lord Charles Snowden Fairfax (Bird's Nest Glen) | State | Marin | |
| 627 | 615 | Jun 2015 | Fort Bragg | State | Mendocino | |
| 628 | 1035 | Jun 2015 | Point Arena Light Station | Other | Mendocino | |
| 629 | 833 | Jun 2015 | Bodega Bay and Harbor | State | Sonoma | |
| 630 | 927 | Jun 2015 | Temple of Kwan Tai | Other | Mendocino | |
| 631 | 5 | Jun 2015 | Fort Ross | State | Sonoma | |
| 632 | 529 | Jun 2015 | Angel Island | State | Marin | |
| 633 | 714 | Jun 2015 | Mendocino Presbyterian Church | State | Mendocino | |
| 634 | 820 | Jun 2015 | Saint Teresa of Avila Church | State | Sonoma | |
| 635 | 915 | Jun 2015 | Petrified Forest | State | Sonoma | |
| 636 | 710 | Jun 2015 | Robert Louis Stevenson State Park | Other | Napa | |
| 637 | 415 | Jun 2015 | Willms Ranch | None | Stanislaus | |
| 638 | 406 | Jun 2015 | Big Oak Flat | State | Tuolumne | |
| 639 | 407 | Jun 2015 | Summersville (Tuolumne) | State | Tuolumne | |
| 640 | 445 | Jun 2015 | Cherokee | Missing | Tuolumne | |
| 641 | 122 | Jun 2015 | Montezuma | Other | Tuolumne | |
| 642 | 419 | Jun 2015 | Jacksonville | State | Tuolumne | |
| 643 | 423 | Jun 2015 | Chinese Camp | State | Tuolumne | |
| 644 | 446 | Jun 2015 | Groveland | State | Tuolumne | |
| 645 | 460 | Jun 2015 | Second Garrote | State | Tuolumne | |
| 646 | 140 | Jun 2015 | Wells Fargo Express Company Building | Other | Tuolumne | |
| 647 | 422 | Jun 2015 | Sonora-Mono Road | State | Tuolumne | |
| 648 | 420 | Jun 2015 | Soulsbyville | State | Tuolumne | |
| 649 | 424 | Jun 2015 | Sawmill Flat | State | Tuolumne | |
| 650 | 139 | Jun 2015 | Saint James Episcopal Church | Other | Tuolumne | |
| 651 | 1053 | Jun 2015 | Sierra Railway Shops | State | Tuolumne | |
| 652 | 296 | Jun 2015 | Copperopolis | State | Calaveras | |
| 653 | 395 | Jun 2015 | Shaw's Flat | State | Tuolumne | |
| 654 | 438 | Jun 2015 | Parrott's Ferry | State | Tuolumne | |
| 655 | 123 | Jun 2015 | Columbia | State | Tuolumne | |
| 656 | 431 | Jun 2015 | Jamestown | Other | Tuolumne | |
| 657 | 788 | Jun 2015 | Stewart Store | State | Amador | |
| 658 | 347 | Jun 2015 | Knights Ferry | State | Stanislaus | |
| 659 | 506 | Jun 2015 | THE COMMUNITY METHODIST CHURCH OF IONE | State | Amador | |
| 660 | 281 | Jun 2015 | O'Byrne Ferry | State | Calaveras | |
| 661 | 432 | Jun 2015 | Springfield | Other | Tuolumne | |
| 662 | 530 | Jun 2015 | Gold Discovery Site | Other | El Dorado | |
| 663 | 34 | Jun 2015 | Pioneer Hall | Other | Amador | |
| 664 | 865 | Jun 2015 | Pioneer Synagogue Site | State | Amador | |
| 665 | 551 | Jun 2015 | Grange Hall Site | Missing | El Dorado | |
| 666 | 786 | Jun 2015 | Argonaut and Kennedy Mines | State | Amador | |
| 667 | 322 | Jun 2015 | Sutter Creek | Other | Amador | |
| 668 | 470 | Jun 2015 | Plymouth Trading Post | None | Amador | |
| 669 | 762 | Jun 2015 | D'Agostini Winery | State | Amador | |
| 670 | 1007 | Jun 2015 | Knight Foundry | State | Amador | |
| 671 | 1051.1 | Jun 2015 | Mountain Quarries Railroad Bridge | State | Placer | |
| 672 | 815 | Jun 2015 | Wakamatsu Tea and Silk Farm Colony | State | El Dorado | |
| 673 | 143 | Jun 2015 | Marshall's Monument | State | El Dorado | |
| 674 | 748 | Jun 2015 | Coloma Road-Coloma | State | El Dorado | |
| 675 | 118 | Jun 2015 | Jackson Gate | None | Amador | |
| 676 | 35 | Jun 2015 | Fiddletown | State | Amador | |
| 677 | 31 | Jun 2015 | Drytown | State | Amador | |
| 678 | 521 | Jul 2015 | Greenwood | State | El Dorado | |
| 679 | 401 | Jul 2015 | Iowa Hill | State | Placer | |
| 680 | 709 | Jul 2015 | Weaverville Joss House | State | Trinity | |
| 681 | 319 | Jul 2015 | Marshall's Blacksmith Shop | None | El Dorado | |
| 682 | 399 | Jul 2015 | Forest Hill | State | Placer | |
| 683 | 899 | Jul 2015 | National Exchange Hotel | State | Nevada | |
| 684 | 843 | Jul 2015 | North Star Mine Powerhouse | State | Nevada | |
| 685 | 629 | Jul 2015 | Omega Hydraulic Diggings | State | Nevada | |
| 686 | 1012 | Jul 2015 | Pelton Wheel Manufacturing Site | State | Nevada | |
| 687 | 398 | Jul 2015 | Yankee Jims | State | Placer | |
| 688 | 484 | Jul 2015 | Georgetown | State | El Dorado | |
| 689 | 628 | Jul 2015 | Alpha Hydraulic Diggings | State | Nevada | |
| 690 | 855 | Jul 2015 | Mount Saint Mary's Convent and Academy | State | Nevada | |
| 691 | 297 | Jul 2015 | Gold Hill Mine | Other | Nevada | |
| 692 | 298 | Jul 2015 | Empire Mine | Other | Nevada | |
| 693 | 914 | Jul 2015 | Holbrooke Hotel | State | Nevada | |
| 694 | 293 | Jul 2015 | Home of Lotta Crabtree | None | Nevada | |
| 695 | 402 | Jul 2015 | Michigan Bluff | State | Placer | |
| 696 | 832 | Jul 2015 | South Yuba Canal Office | State | Nevada | |
| 697 | 863 | Jul 2015 | Nevada Theatre | State | Nevada | |
| 698 | 292 | Jul 2015 | Home of Lola Montez | Other | Nevada | |
| 699 | 77 | Jul 2015 | Old Town of Shasta | State | Shasta | |
| 700 | 377 | Jul 2015 | Pioneer Baby's Grave | State | Shasta | |
| 701 | 166 | Jul 2015 | French Gulch | State | Shasta | |
| 702 | 131 | Jul 2015 | Whiskeytown | None | Shasta | |
| 703 | 164 | Jul 2015 | Old Arrow Tree | Other | Humboldt | |
| 704 | 778 | Jul 2015 | La Grange Mine | State | Trinity | |
| 705 | 483 | Jul 2015 | Father Rinaldi's Foundation | Other | Shasta | |
| 706 | 783 | Jul 2015 | Jacoby Building | State | Humboldt | |
| 707 | 543 | Jul 2015 | California's First Drilled Oil Wells | State | Humboldt | |
| 708 | 842 | Jul 2015 | Arcata and Mad River Rail Road Company | State | Humboldt | |
| 709 | 215 | Jul 2015 | Camp Curtis | State | Humboldt | |
| 710 | 882 | Jul 2015 | Humboldt Harbor Historical District | State | Humboldt | |
| 711 | 883 | Jul 2015 | Ferndale | State | Humboldt | |
| 712 | 173 | Jul 2015 | Centerville Beach Cross | Other | Humboldt | |
| 713 | 146 | Jul 2015 | Trinidad Head | Other | Humboldt | |
| 714 | 154 | Jul 2015 | Fort Humboldt | State | Humboldt | |
| 715 | 216 | Jul 2015 | Trinidad | State | Humboldt | |
| 716 | 838 | Jul 2015 | Old Indian Village of Tsurai | State | Humboldt | |
| 717 | 477 | Jul 2015 | Eureka | State | Humboldt | |
| 718 | 544 | Jul 2015 | Fort Ter-Wer Site | State | Del Norte | |
| 719 | 545 | Jul 2015 | Camp Lincoln | State | Del Norte | |
| 720 | 645 | Jul 2015 | Pioneer Stage Road to Oregon | State | Del Norte | |
| 721 | 497 | Jul 2015 | S.S. Emidio | State | Del Norte | |
| 722 | 951.1 | Jul 2015 | Battery Point Lighthouse | State | Del Norte | |
| 723 | 541 | Jul 2015 | Brother Jonathan Cemetery | State | Del Norte | |
| 724 | 649 | Jul 2015 | Tolowa Indian Village Site | State | Del Norte | |
| 725 | 517 | Jul 2015 | Emigrant Trail | State | Siskiyou | |
| 726 | 317 | Jul 2015 | Fort Jones Site | Other | Siskiyou | |
| 727 | 901 | Jul 2015 | Yreka | State | Siskiyou | |
| 728 | 32 | Jul 2015 | Reading's Bar | State | Shasta | |
| 729 | 379 | Jul 2015 | Fort Reading | Other | Shasta | |
| 730 | 10 | Jul 2015 | Reading Adobe | State | Shasta | |
| 731 | 396 | Jul 2015 | Strawberry Valley Stage Station | Other | Siskiyou | |
| 732 | 519 | Jul 2015 | Bell's Bridge | Missing | Shasta | |
| 733 | 116 | Jul 2015 | Battle Rock | State | Shasta | |
| 734 | 78 | Jul 2015 | Clear Creek | Other | Shasta | |
| 735 | 33 | Jul 2015 | Southern's Stage Station | Other | Shasta | |
| 736 | 58 | Jul 2015 | Old California Oregon Road | Other | Shasta | |
| 737 | 120 | Jul 2015 | Dersch Homestead | State | Shasta | |
| 738 | 148 | Jul 2015 | Bass Hill | Other | Shasta | |
| 739 | 357 | Jul 2015 | Nomi Lackee Indian Reservation | Other | Tehama | |
| 740 | 736 | Jul 2015 | Letts Valley | State | Colusa | |
| 741 | 11 | Jul 2015 | Noble Pass Route | Other | Shasta | |
| 742 | 247 | Jul 2015 | First Long-Distance Telephone Line | Other | Nevada | |
| 743 | 320 | Jul 2015 | Timbuctoo | State | Yuba | |
| 744 | 294 | Jul 2015 | Rough and Ready | State | Nevada | |
| 745 | 799 | Jul 2015 | Overland Emigrant Trail | State | Nevada | |
| 746 | 852 | Jul 2015 | North Bloomfield Mining and Gravel Company | State | Nevada | |
| 747 | 390 | Jul 2015 | Bridgeport Covered Bridge | State | Nevada | |
| 748 | 321 | Jul 2015 | Smartsville | None | Yuba | |
| 749 | 363 | Jul 2015 | Centinela Springs | State | Los Angeles | |
| 750 | 911 | Jul 2015 | Chatsworth Calera | None | Los Angeles | |
| 751 | 1051 | Jul 2015 | Mountain Quarries Railroad Bridge | State | El Dorado | |
| 752 | 256 | Aug 2015 | Mokelumne Hill IOOF Hall | None | Calaveras | |
| 753 | 268 | Aug 2015 | West Point | State | Calaveras | |
| 754 | 284 | Aug 2015 | Jesus Maria | None | Calaveras | |
| 755 | 41.1 | Aug 2015 | Big Bar - Calaveras | None | Calaveras | |
| 756 | 265 | Aug 2015 | Chili Gulch | State | Calaveras | |
| 757 | 41 | Aug 2015 | Big Bar - Amador | None | Amador | |
| 758 | 1001 | Aug 2015 | California Native American Ceremonial Roundhouses, Chaw Se' Roundhouse | State | Amador | |
| 759 | 29 | Aug 2015 | Volcano | State | Amador | |
| 760 | 261 | Aug 2015 | Mokelumne Hill Congregational Church | None | Calaveras | |
| 761 | 286 | Aug 2015 | Rail Road Flat | State | Calaveras | |
| 762 | 252 | Aug 2015 | San Andreas | Other | Calaveras | |
| 763 | 269 | Aug 2015 | Mokelumne Hill | Other | Calaveras | |
| 764 | 295 | Aug 2015 | Paloma | State | Calaveras | |
| 765 | 253 | Aug 2015 | Sandy Gulch | Other | Calaveras | |
| 766 | 280 | Aug 2015 | Glencoe (Mosquito Gulch) | None | Calaveras | |
| 767 | 37 | Aug 2015 | Clinton | Other | Amador | |
| 768 | 663 | Aug 2015 | COURTHOUSE OF CALAVERAS COUNTY and the Leger Hotel | State | Calaveras | |
| 769 | 39 | Aug 2015 | Butte Store | Other | Amador | |
| 770 | 715 | Aug 2015 | FIRST ASTRONOMICAL OBSERVATORY IN CALIFORNIA | State | Amador | |
| 771 | 36 | Aug 2015 | Middle Bar | None | Amador | |
| 772 | 274 | Aug 2015 | Carson Hill | State | Calaveras | |
| 773 | 287 | Aug 2015 | Angels Camp | Other | Calaveras | |
| 774 | 276 | Aug 2015 | Robinson's Ferry | State | Calaveras | |
| 775 | 267 | Aug 2015 | Mitchler Hotel (Murphy's Hotel) | State | Calaveras | |
| 776 | 275 | Aug 2015 | Murphys | Other | Calaveras | |
| 777 | 466 | Aug 2015 | Peter L. Traver Building | State | Calaveras | |
| 778 | 370 | Aug 2015 | Vallecito Bell Monument | Other | Calaveras | |
| 779 | 273 | Aug 2015 | Vallecito | Other | Calaveras | |
| 780 | 465 | Aug 2015 | Old Mining Camp of Brownsville | State | Calaveras | |
| 781 | 288 | Aug 2015 | Altaville | Other | Calaveras | |
| 782 | 258 | Aug 2015 | Fourth Crossing | State | Calaveras | |
| 783 | 735 | Aug 2015 | Prince-Garibardi Building | State | Calaveras | |
| 784 | 138 | Aug 2015 | Mark Twain Cabin Historic Markers | State | Tuolumne | |
| 785 | 734 | Aug 2015 | Angels Hotel | State | Calaveras | |
| 786 | 499 | Aug 2015 | Altaville Grammar School | State | Calaveras | |
| 787 | 124 | Aug 2015 | Tuttletown | State | Tuolumne | |
| 788 | 255 | Aug 2015 | Calaveritas | State | Calaveras | |
| 789 | 769 | Aug 2015 | Stevenot Birthplace | Other | Calaveras | |
| 790 | 271 | Aug 2015 | Pioneer Cemetery | None | Calaveras | |
| 791 | 272 | Aug 2015 | Douglas Flat | Other | Calaveras | |
| 792 | 282 | Aug 2015 | El Dorado | Other | Calaveras | |
| 793 | 956 | Aug 2015 | California Caverns at Cave City | Other | Calaveras | |
| 794 | 303 | Aug 2015 | Rubidoux Grist Mill | Other | Riverside | |
| 795 | 20 | Aug 2015 | Parent Washington Navel Orange Tree | Other | Riverside | |
| 796 | 787 | Aug 2015 | De Anza Crossing of the Santa Ana River | Other | Riverside | |
| 797 | 761 | Aug 2015 | Mission Inn | State | Riverside | |
| 798 | 943 | Aug 2015 | Jensen Alvarado Ranch | State | Riverside | |
| 799 | 617 | Aug 2015 | Fort Benson | Other | San Bernadino | |
| 800 | 121 | Aug 2015 | Agua Mansa | Other | San Bernadino | |
| 801 | 95 | Aug 2015 | Guachama Rancheria | Other | San Bernadino | |
| 802 | 102 | Aug 2015 | Rubidoux House | None | Riverside | |
| 803 | 42 | Aug 2015 | San Bernardino Asistencia | Missing | San Bernadino | |
| 804 | 448 | Sep 2015 | Patchen | State | Santa Clara | |
| 805 | 860 | Sep 2015 | Hihn Building, SUPERINTENDENT'S OFFICE, 'Camp Capitola' | State | Santa Cruz | |
| 806 | 387 | Sep 2015 | THE GLASS HOUSE, CASA MATERNA OF THE VALLEJOS | None | Monterey | |
| 807 | 1055 | Sep 2015 | The Mystery Spot | Soon | Santa Cruz | |
| 808 | 998 | Sep 2015 | Castro Adobe | Other | Santa Cruz | |
| 809 | 587 | Sep 2015 | First Public School Site | Other | San Francisco | |
| 810 | 192 | Sep 2015 | Jenny Lind Theatre, EL DORADO, PARKER HOUSE, AND DENNISON'S EXCHANGE | State | San Francisco | |
| 811 | 650 | Sep 2015 | What Cheer House Site | State | San Francisco | |
| 812 | 500 | Sep 2015 | Clay Street Hill Railroad Site | Other | San Francisco | |
| 813 | 328 | Sep 2015 | Long Wharf Site | None | San Francisco | |
| 814 | 85 | Sep 2015 | Office of the California Star Newspaper Site | Other | San Francisco | |
| 815 | 89 | Sep 2015 | Parrott Granite Block Site | None | San Francisco | |
| 816 | 81 | Sep 2015 | Montgomery Landing Place | Other | San Francisco | |
| 817 | 88 | Sep 2015 | Niantic Storeship Site | Other | San Francisco | |
| 818 | 87 | Sep 2015 | Site of First United States Branch Mint in California | State | San Francisco | |
| 819 | 819 | Sep 2015 | Hudson's Bay Company Site | State | San Francisco | |
| 820 | 459 | Sep 2015 | Mellus and Howard Site | None | San Francisco | |
| 821 | 462 | Sep 2015 | Jewish Religious Services Site | State | San Francisco | |
| 822 | 236 | Sep 2015 | First Ship into San Francisco Bay - The San Carlos | State | San Francisco | |
| 823 | 79 | Sep 2015 | Presidio of San Francisco | State | San Francisco | |
| 824 | 90 | Sep 2015 | Fort Gunnybags Site | Other | San Francisco | |
| 825 | 119 | Sep 2015 | Portsmouth Plaza | Other | San Francisco | |
| 826 | 941 | Sep 2015 | Farnsworth's Green Street Lab | State | San Francisco | |
| 827 | 810 | Sep 2015 | Old Saint Mary’s Church | State | San Francisco | |
| 828 | 82 | Sep 2015 | Castillo De San Joaquín Site | Other | San Francisco | |
| 829 | 453 | Sep 2015 | Bank of Lucas, Turner and Company | State | San Francisco | |
| 830 | 80 | Sep 2015 | Montgomery Block Site | State | San Francisco | |
| 831 | 408 | Sep 2015 | Freemasons Site | Missing | San Francisco | |
| 832 | 964 | Sep 2015 | Birthplace of The United Nations, War Memorial Complex | Other | San Francisco | |
| 833 | 1010 | Sep 2015 | Third Baptist Church Site | State | San Francisco | |
| 834 | 760 | Sep 2015 | Laurel Hill Cemetery Site | Missing | San Francisco | |
| 835 | 1024 | Sep 2015 | Juana Briones Rancho Site | State | San Francisco | |
| 836 | 691 | Sep 2015 | Sarcophagus of Thomas Starr King | State | San Francisco | |
| 837 | 91 | Sep 2015 | Telegraph Hill | Other | San Francisco | |
| 838 | 754 | Sep 2015 | Mark Hopkins Institute of Art Site | State | San Francisco | |
| 839 | 696 | Sep 2015 | Pony Express Site | State | San Francisco | |
| 840 | 937 | Sep 2015 | Liberty Bell Slot Machine Site | State | San Francisco | |
| 841 | 84 | Sep 2015 | Rincon Hill | State | San Francisco | |
| 842 | 987 | Sep 2015 | Treasure Island | State | San Francisco | |
| 843 | 841 | Sep 2015 | Conservatory of Flowers | State | San Francisco | |
| 844 | 454 | Sep 2015 | Woodward's Gardens Site | State | San Francisco | |
| 845 | 1002 | Sep 2015 | Giant Powder Company Site, San Francisco | Other | San Francisco | |
| 846 | 623 | Sep 2015 | Union Square | Missing | San Francisco | |
| 847 | 791 | Sep 2015 | Bancroft Library Site | State | San Francisco | |
| 848 | 876 | Sep 2015 | City of Paris Building | Other | San Francisco | |
| 849 | 861 | Sep 2015 | First California State Fair Site | State | San Francisco | |
| 850 | 83 | Sep 2015 | Shoreline Markers | Other | San Francisco | |
| 851 | 772 | Sep 2015 | Original Site of Saint Mary's College Site | State | San Francisco | |
| 852 | 327.1 | Sep 2015 | Mission Dolores Lagoon Site | State | San Francisco | |
| 853 | 86 | Sep 2015 | California Theatre Site | Other | San Francisco | |
| 854 | 695 | Oct 2015 | Plum Valley House | State | Sierra | |
| 855 | 971 | Oct 2015 | Sierra County Sheriff's Gallows | State | Sierra | |
| 856 | 723 | Oct 2015 | Johnsville Ski Area | State | Plumas | |
| 857 | 196 | Oct 2015 | Jamison City, Eureka Mills, Johnstown and the Famous Eureka Mine | State | Plumas | |
| 858 | 421 | Oct 2015 | Henness Pass Road | Other | Sierra | |
| 859 | 76 | Oct 2015 | Roop's Fort | Other | Lassen | |
| 860 | 675 | Oct 2015 | Nobles Emigrant Trail (Susanville) | State | Lassen | |
| 861 | 336 | Oct 2015 | Beckwourth Pass | Other | Plumas | |
| 862 | 758 | Oct 2015 | Fort Janesville | Other | Lassen | |
| 863 | 565 | Oct 2015 | Lassen Grave | Other | Lassen | |
| 864 | 678 | Oct 2015 | Lassen Emigrant Trail (Westwood) | State | Lassen | |
| 865 | 394 | Oct 2015 | San Francisco Bay Discovery Site Plaque | State | San Mateo | |
| 866 | 14 | Oct 2015 | Cressler and Bonner Trading Post | Other | Modoc | |
| 867 | 677 | Oct 2015 | Nobles Emigrant Trail (Viewland) | State | Lassen | |
| 868 | 15 | Oct 2015 | Bonner Grade | None | Modoc | |
| 869 | 546 | Oct 2015 | Applegate-Lassen Emigrant Trail | State | Modoc | |
| 870 | 109 | Oct 2015 | Chimney Rock | Other | Modoc | |
| 871 | 430 | Oct 2015 | Fort Bidwell | Missing | Modoc | |
| 872 | 8 | Oct 2015 | Bloody Point | None | Modoc | |
| 873 | 9 | Oct 2015 | Captain Jack's Stronghold | State | Siskiyou | |
| 874 | 111 | Oct 2015 | Old Emigrant Trail | Other | Modoc | |
| 875 | 110 | Oct 2015 | Canby's Cross | State | Siskiyou | |
| 876 | 13 | Oct 2015 | Guillem's Graveyard | Other | Siskiyou | |
| 877 | 108 | Oct 2015 | Battle of Land's Ranch | None | Modoc | |
| 878 | 850.2 | Oct 2015 | Tule Lake Relocation Center | State | Modoc | |
| 879 | 6 | Oct 2015 | Frémont's Camp | None | Modoc | |
| 880 | 231 | Oct 2015 | Elizabethtown | Other | Plumas | |
| 881 | 555 | Oct 2015 | Lockhart Ferry | State | Shasta | |
| 882 | 759 | Oct 2015 | Fall River Valley School | State | Shasta | |
| 883 | 337 | Oct 2015 | Rich Bar | State | Plumas | |
| 884 | 355 | Oct 2015 | Fort Crook | Other | Shasta | |
| 885 | 184 | Oct 2015 | Lassen Trading Post Site | State | Plumas | |
| 886 | 763 | Oct 2015 | Lassen Emigrant Trail (Bieber) | State | Lassen | |
| 887 | 481 | Oct 2015 | Spanish Ranch and Meadow Valley | Other | Plumas | |
| 888 | 213 | Oct 2015 | Rabbit Creek Hotel Monument | Other | Plumas | |
| 889 | 212 | Oct 2015 | Pioneer Grave | Other | Plumas | |
| 890 | 197 | Oct 2015 | Buck's Lake Ranch Hotel and Store | Other | Plumas | |
| 891 | 625 | Oct 2015 | Pioneer School House | Other | Plumas | |
| 892 | 674 | Oct 2015 | Round Valley | State | Mendocino | |
| 893 | 479 | Oct 2015 | American Ranch and Hotel Site | None | Plumas | |
| 894 | 480 | Oct 2015 | Plumas House Site | None | Plumas | |
| 895 | 343 | Oct 2015 | Old Store at La Honda | Other | San Mateo | |
| 896 | 906 | Oct 2015 | Steele Brothers Dairy Ranches | State | San Mateo | |
| 897 | 583 | Oct 2015 | Felton Covered Bridge | State | Santa Cruz | |
| 898 | 949 | Oct 2015 | First Congregational Church of Pescadero | State | San Mateo | |
| 899 | 930 | Oct 2015 | Pigeon Point Lighthouse | State | San Mateo | |
| 900 | 23 | Oct 2015 | Portolá Camp: October 23 | None | San Mateo | |
