Hidden Valley and Primm ATV Tour. No experience necessary on this ATV/quad bike adventure tour from Las Vegas to the Hidden Valley. Escape the pavements of Las Vegas and have lots of fun as you bump along the dusty trails in the McCullough Mountain range, Hidden Valley and across the Roach Dry Lakebed. The longest ATV tour in Las Vegas and the shortest ride to get there! Book now and Save 15%: Hidden Valley and Primm ATV Tour.