California Historical Landmarks in Alpine County
California Historical Landmark 378
Pioneer Odd Fellows
SR 88
Carson Pass
On some large rocks near Carson Pass, a group of pioneers inscribed their names and the emblem of the Independent Order of Odd Fellows in 1849.
Citation from California Office of Historic Preservation

The Independent Order of Odd Fellows (I.O.O.F.) is an altruistic fraternal organization derived from the similar English Oddfellows service organizations which came into being during the 1700s....Although in Britain the Odd Fellows tended to meet in pubs, in the U.S. the lodges often built their own facilities. Many of these are now on the U.S. National Register of Historic Places....
From Wikipedia entry for Independent Order of Odd Fellows
Historic IOOF Buildings in California
Arbuckle, Arroyo Grande, Big Oak Flat, Colusa, Copperopolis (1874-1903), Copperopolis (1903-1939), Coulterville, Etna, Eureka, Farmington, Ferndale, Forest Hill, Galt, Georgetown, Geyserville, Hanford, Jenny Lind, Knights Ferry, La Grange, Live Oak, Mokelumne Hill, Murphys, Nevada City, Oakdale, Orland, Point Arena, Quincy, Red Bluff, Roseville, Sebastopol, Snelling, Truckee, Wheatland, Woodbridge, Woodland, Yreka
Historic IOOF Buildings in Nevada
Austin, Gardnerville, Nevada, Yerington
Historic IOOF Buildings in Oregon
Ashland, Coquille, Gold Hill, Klamath Falls
Historic IOOF Buildings in Utah