From Questa New Mexico take NM 522 to the village of Costilla (20 miles) take a right (east) on NM 196 toward Amalia at the Shamrock gas station. The pavement will end after Amalia. Keep going past Rio Costilla Park and past the Carson National Forest boundary. The road is now marked FR 1950. at about 21 miles take a right at the junction. follow this good dirt road about 9 miles to the "trailhead" at the Grassy Creek drainage.