Observed arrival · 2026-09-26
Clear Lake’s depth map, with the fine print in plain sight
An interactive Clear Lake map lets visitors explore estimated water depth at different Rumsey gauge levels, check county boat ramps and public swim beaches, and consult lake conditions.
- For
- Clear Lake boaters and beach visitors
- Worth noticing
- At full lake, its contour-based volume estimate is within 1% of the published figure; the site explains the method and its limits.
Field notes
The page explains that its depth estimates come from Lake County’s five-foot contour map, which the county describes as approximate and educational. Its full-lake estimate of 1,108,000 acre-feet is compared with the published 1,115,000, and the page says the deepest mapped contour may not capture the true deepest point. Ramp comparisons are limited to ten county-listed ramps and do not account for width, slope, length, or trailer parking.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
One card from the complete issue