Here is Deep Creek Hot Springs located in Apple Valley, California. It’s a natural hot spring located along the Pacific Crest Trail with pools of varying degrees of warmth (hot tub status to cold pool status).
It’s about a 2 mile hike out from Bowen Ranch, or you can take the Pacific Crest Trail depending on how adventurous you are. :)
More photos of my friends and I from our last trip to the Deep Creek Hot Springs in Apple Valley, CA. The trail head starts at Bowen Ranch where parking is available for a small fee, or is accessible for long-distance hikers on the Pacific Crest Trail.