What we know
'Originally a one-room brick schoolhouse built in 1896', enlarged 1932 and 1959; 'The Larkspur Post Office is in the building that was built and first used as the Larkspur Elementary School' (binder statements of 1998 and about 2007). Placed at GNIS's post-office point (2013); the 1956 county map's 'School' symbol, georeferenced, falls within 300 feet of it (Larkspur Historical Society binder 1 p. 220).
Where it was
USGS GNIS Post Office 2736052
The U.S. Geological Survey's official point for this place name.
Sources
Sources are named in the text above. Numbers such as S-0080 refer to our source list. Most newspaper quotations were read in the Colorado Historic Newspapers Collection. Long quotations from recent books are shortened here.