The Nall Park trails are part of the Rozarks Network. Check Urban Trail Co.'s website for closures.
Beyond Thunderdome descends from the the Roeland Park Dome parking area. The singletrack opens with a few rollers that lead into a tall bermed switchback. Cross the paved trail and head right following the signs for Beyond Thunderdome. The trail will lead downhill on the smoothest route to the bottom of the valley.
At the end, you’ll come across a boardwalk. Hang a left to roll off or keep straight for a jump to the end of Ropoflo and Aunty Entity. Best enjoyed as a descent, this trail is also the easiest route back to the top.