Black Rock Hot Springs is a 0.5 mile out and back trail located near Arroyo Hondo, NM that features hot springs. The trail is primarily used for hiking.
The spring is located by the John Dunn bridge park on the east side A little bit up the hill. This is another all trails misleading directions.
I think this spring is on a par with Brigadoon. I walked all over the area, even stood on the very spot where the pin was on the map: black rocks yes, hot spring not a sign! Felt like I had been on a snipe hunt.