Southeast of Twin Falls and south of Hansen in the Rock Creek Recreation Area, the South Hills has a huge trail network open to horseback riding.
To reach the Third Fork Trailhead from the intersection of US 30 and CR G3 (Rock Creek Rd.) in Hansen, go south on CR G3 for 21 miles. Park on the left at the Third Fork Trailhead.
Overall, Third Fork / Heart Attack Loop is the 24th most popular horse trail of all 56 horseback rides in Idaho.