Northwest of Sun Valley, the Adams Gulch Loop is a 10+ mile horseback riding route combining jeep road and trail with over a 1400 feet climb. Use caution since this route is very popular with mountain bikers.
To reach the horseback riding trailhead from Ketchum, head north on SR75 for about a mile. Turn left heading west on Adams Gulch Road. The trailhead parking area is just past the intersection with Old Mill Road. Continue west on Adams Gulch Road for 6 miles. While the doubletrack does continue west, turn right heading northeast on Adams Gulch Trail climbing up. Follow this trail to the east for 7 miles back to the trailhead.
Overall, Adams Gulch Loop is the 13th most popular horse trail of all 56 horseback rides in Idaho.