On a late October 2001 weekend I made a couple of hikes to Deep Creek Hot Springs outside of San Bernadino, California. There are four main soaking areas at the hot springs, ranging from hot to mild, plus Deep Creek itself, which at this time of year was actually refreshingly cool after the hike in or sitting long spells in the hot water. In winter the creek is much cooler so I don't think the word refreshing would be the most accurate word to use. The tubs (actually more like rocked-in areas) are well maintained by volunteers, periodically scrubbed to remove accumulated algea. Three of the tubs are built into a rocky outcrop, the forth in a rocked-in area in the creek. The creek itself is in a deep v-shaped canyon carved into the San Bernadino Mountains by Deep Creek. The area is surrounded by many ledges perfect for relaxing in the sun, whose warmth provided a welcome change from the chilly autumn temperatures back home in Toronto.
For more details & directions visit my Deep Creek page in my gps & hiking section.