Ryan House and Lost Horse Well

Twentynine Palms, Riverside County, California Listed Ref. 75000175 Historic district
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Ryan House and Lost Horse Well, California
Photo: Joshua Tree National Park, Public domain, via Wikimedia Commons

Why it's listed

Set near the southwestern base of Ryan Mountain in what is now Joshua Tree National Monument, this ranch complex includes an adobe house of roughly 30 by 40 feet, two smaller adobe buildings, a 70-foot-deep well with a windmill and pump, a graveyard of about ten graves, and the scant remains of a boulder corral. The Ryan family, led by brothers Tom and Jepp, arrived in the 1890s and, according to local tradition, raised the adobe residence during that decade. They took over the Lost Horse Mine in 1896, built a ten-stamp mill there, and piped water from Lost Horse Spring to the mine about three miles away. A well dug in 1905 changed the spring's name to Lost Horse Well. The site is valued as a surviving example of desert mining life and of the early, successful mining of the area. Weathering has worn the adobe, and one small building is close to ruin.

Machine-generated summary. This summary was generated by a language model from the official nomination document and has not been reviewed line by line by an editor. It may contain errors. Check the source document before relying on any detail. Source: nomination document (PDF) · catalog entry. Generated October 2026 (model claude-sonnet-5-5, prompt v1.0-2026-10-29).

Period of significance1890s
Areas of significanceIndustry, Engineering
Acreage16
Boundary sourceNPS cultural-resource GIS polygon
Full listing pageRyan House and Lost Horse Well (property record)

What listing means for this property

This is a historic district. Buildings within its boundary are either contributing (they add to the district's significance) or non-contributing. Owners of contributing income-producing buildings can claim the 20% federal rehabilitation tax credit; homeowners should look at state credits. National Register districts impose no design review by themselves; a local historic district ordinance, if one exists, does (the difference explained).

General information, not legal or tax advice. Rules change; confirm with your State Historic Preservation Office or a qualified adviser.