Southeast of Green River, the Goblin Vallley State Park has a variety of short trails through red rock hoodoos. The rock formations are in a series of three valleys heading away from the main parking area. The valley floor where the rock formations are located are very flat and easily accessible for families. This is mainly an open hiking area without marked trails, except those running from the camping area towards the main parking area.
To reach the Goblin Vallley State Park trailhead from US70, use Exit 147. Head south on SR24 for 23.5 miles. Turn right heading west on Temple Mountain Road for 5 miles. Turn left heading south on Goblin Valley Road for 7.4 miles into Goblin Vallley State Park (stay to the left to find the main hiking area amongst the goblin rock formations).
Goblin Vallley State Park is very popular, especially on the weekends. If you want the best photos and some solitude, make sure to arrive early.
Overall, Goblin Vallley State Park is the 31st most popular hiking trail of all 38 hikes in Utah.