F South Road 604 is a hiking, biking, and horse trail in Sandoval County, New Mexico. It is within Jemez National Recreation Area and Santa Fe National Forest. It is 10.5 miles long and begins at 7,266 feet altitude. Traveling the entire trail is 21.0 miles with a total elevation gain of 2,207 feet. The Cass Tank (elevation 8,278 feet) reservoir can be seen along the trail.
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