Hidden Valley and Primm ATV Tour. Get away from the glitz and pavements of Las Vegas and get ready to ride the trails of the McCullough Mountain Range, Hidden Valley, and the Roach Dry Lakebed. This no-experience-required all-terrain vehicle (ATV) adventure tour takes you into the Hidden Valley. Just a short ride from the Strip, this is the longest ATV tour in Las Vegas. Book and Save 16%: Hidden Valley and Primm ATV Tour