Jemez Mountains is located near Jemez Pueblo, NM. The trail is primarily used for fly fishing and off road driving and is accessible year-round.
off road driving
Really crowded area, but still beautiful. We went the weekend after Memorial Day and spent about 90 minutes trying to locate a campsite. Seriously, it's REALLY crowded. People race up and down the dirt road at all hours.
If you're willing to tolerate the people and vehicles, though, the Jemez Mountains are incredibly beautiful. This is one of our favorite places to camp. We tend to go for the northern end, because it's less crowded. Access to the river isn't available at the north end--the area is protected for the safety of an endangered mouse.
If you have a free evening, I highly recommend the northern end of the road. It's about 90 minutes from Albuquerque, so the trip is nice and short. :-)