Poison Lake
Drag the handle to compare the two views. The orange dot marks the spring, in a frame about three quarters of a mile wide.
Poison Lake is a lake, listed in the thermal springs record with a hot reading, and it sits in Okanogan County, Washington, a couple of miles from Oroville. The name is on the record and so is the temperature; nothing else much is. Nobody is listed as owner. No access status, no elevation. The reading itself is hot, above soaking temperature, and the name alone is reason to ask before touching the water.
Golden Road passes a few hundred yards away. The record leaves the elevation blank, but the climate on file is the dry kind: twenty-some inches of precipitation and not much snow. Landowner is not recorded. Oroville is the closest town listed, and the place to ask.
Lost Lake group unit, close to nineteen miles away, is the only campground the record turns up. Winter is the listed season, and the light snowfall on file does not argue against it. Take the hot reading seriously and test before you touch the water. Check ownership and permission first; neither is on record.
Aircraft with laser scanners measured this ground to within inches. The scan strips out trees and buildings, leaving the bare shape of the land around Poison Lake.
- Setting
- Hillside
- The spring sits on a steep slope that climbs to the northwest.
- Highest ground nearby
- 399 ft above the spring
- Within a quarter mile, to the northwest
A slice through the ground from northwest to southeast, about 0.6 miles end to end.
Elevation data: USGS 3D Elevation Program. Aerial imagery: USGS The National Map. Public domain.
That's about twice the US average of 65. It's higher than at 86% of the springs on this site.
Heat flow measures the warmth working its way up through the ground from deep inside the earth. Where it runs high, rain and snowmelt that seep down through cracks in the rock come back up hot.
See every spring on the geothermal heat map →
Heat flow estimate: Stanford Thermal Earth Model (Aljubran & Horne, 2024), CC BY 4.0.
Overview Lost Lake Group Site is located in Lost Lake Campground which is situated on the northern edge of Lost Lake on the Tonasket Ranger District of the Okanogan-Wenatchee National Forest. Set beneath mixed-conifer forest and surrounded by mountains, this campground offers one group site, suitable for large family and group camping excursions as well as several non-reservable single and double sites.Recreation Lost Lake Campground offers outdoor enthusiasts the opportunity to hike, fis...
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