#8 Sledgehammer Video: The Sledgehammer Video documents a group of "Hard Core 4-Wheelers" as they are led through the trail by the club who built it, the Victor Valley 4-Wheelers. Located in California’s Johnson Valley OHV Area north of Palm Springs, this trail is a rocky desert trail that will challenge even the best equipped vehicles. Rick Russell joins another group to run Jackhammer. If Sledgehammer doesn’t keep you on the edge of your seat, then Jackhammer will! This video also includes Awesome Canyon, local sand dunes and some earthquake fissures. Sledgehammer Map 1996. Running time approximately 72 minutes.