De Luz Warm Springs
The orange dot marks the spring, in a frame about three quarters of a mile wide.
A warm spring beside De Luz Road in the hills outside Fallbrook, in San Diego County. The water is warm, the sort of temperature that feels good on a cool morning and goes unnoticed by afternoon. A 1961 USGS sample found it alkaline and low in dissolved minerals. The owner is not on record and there is no note about whether you can stop and use it.
Low foothills a few hundred feet above sea level. The spring lies right at the roadside on De Luz Road. The road is the approach. Fourteen inches of rain falls over a year, and snow never does. Wildomar Campground is the camping we have on record, roughly ten miles away by our reckoning.
The cooler months are the listed season. Roadside, so the visit is quick. The water chemistry figures are from 1961 and the temperature reading is of the same vintage, so the spring may behave differently now. Neither access nor ownership is on file. Wildomar Campground, ten miles off, is where to camp.
USGS hasn't flown a detailed laser scan here yet, so this view comes from aerial photos and older elevation data.
- Setting
- Hillside
- The spring sits on a steep slope that climbs to the northeast.
- Highest ground nearby
- 285 ft above the spring
- Within a quarter mile, to the northeast
A slice through the ground from southwest to northeast, about 0.6 miles end to end.
Elevation data: USGS 3D Elevation Program. Aerial imagery: USGS The National Map. Public domain.
That's about 1½ times the US average of 65. It's higher than at 30% 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.
The water at De Luz Warm Springs is alkaline (pH 9.5) with 246 mg/L total dissolved solids.
11 sites available. Wildomar Campground is currently closed due to the Wildomar Fire until further notice.
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