Vestige mapCalifornia › Mason and Thayer Mine

Mason and Thayer Mine

Abandoned FactoryModerate difficulty● Red hazardCalifornia

Abandoned Factory documented in OpenStreetMap. Verify current condition, ownership and legal access before visiting.

Site typeAbandoned Factory
StateCalifornia
Coordinates40.8424, -123.0167
Difficulty · ModerateSome effort — hiking, navigating fences or rough terrain.
Hazard · RedSerious hazard — structural collapse, contamination, or active security/arrest risk.
Light todaySunrise 06:27 · sunset 20:03 (local) — golden hour is the first and last hour of that window
Conditions today64–83°F · 1% precip chance · wind to 9 mph
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Vestige documents abandoned & historic places for education and preservation. Always obtain permission before visiting and follow local law.