Warm Spring
Warm Spring flows at 92 degrees in Angeles National Forest near Los Angeles County, producing water 28.7 degrees warmer than ambient conditions while sitting just 75 feet from Lake Hughes Road.
The spring emerges at 2,005 feet elevation in chaparral and oak woodland where the steep San Gabriel Mountains rise dramatically north of the Los Angeles metropolitan area. The thermal feature sits immediately accessible from a maintained road, surrounded by dry-season brush and scattered oak in typical Southern California foothill terrain.
The spring sits within geologically active terrain shaped by the San Andreas Fault system, where groundwater heating occurs through deep circulation in fractured rock. US Forest Service management maintains the spring's wild character despite its accessibility, preserving the natural resource for continued public use.
This easily accessible roadside spring is suitable for visitors of all abilities. The 92-degree water is warm and inviting but not dangerously hot. Morning visits offer better solitude despite the accessible location. Angeles National Forest's mild climate allows year-round visits, with spring and fall offering the most pleasant temperatures.
Is Warm Spring worth visiting?
Best for
- Warm-water soaking
- Easy day trips
- Overnight camping trips