Sinkhole risk in Lake County, OR: Not karst, but voids possible

Not karst, but voids possible

No soluble bedrock; some pseudokarst (piping or lava-tube ground).

On soluble rock: 0%
At or near the surface: 0%
Buried under cover: 0%

What this means before you buy

Not true karst, but soil piping or lava tubes can still open voids - mention it to an inspector.

Across 8,139 square miles, under one square mile of Lake County maps onto soluble rock. With about 8,194 residents (1 per square mile), much of the land is open, and the mapped rock may sit far from where people actually live. The figures come from 296 map points about 5.2 miles apart, so a pocket smaller than that can be missed or overstated.

Worth reading for this county: how ground with no limestone still opens up, and how these percentages are measured.

Counties around Lake County

The nearest county rated sinkhole country is Emery County, UT, about 568 miles southeast. 5 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Klamath County, OR 64 mi west · 0% at surface
Harney County, OR 73 mi east · 0% at surface
Modoc County, CA 84 mi south · 0% at surface
Deschutes County, OR 88 mi northwest · 0% at surface
Crook County, OR 95 mi north · 0% at surface
Jackson County, OR 119 mi west · 2% at surface

Against the rest of Oregon

Lake County ranks 24 of 36 in Oregon for soluble rock at the surface, and sits above 0% of US counties on that measure.