Tooele • The Ultra4 American Rock Sports Challenge returns to Miller Motorsports Park Friday and Saturday, bringing one of the most unique off-road events in Utah back for a second consecutive year.
Few other forms of racing has seen the growth and grassroots commitment as Ultra4 racing, perhaps because the rulebook is very thin.
Vehicles must be capable of running four-wheel-drive, and everything else is unlimited. They must be capable of extreme rock-crawling, yet able to reach speeds over 100 mph. The result is a variety of Jeeps, trucks and buggies ranging from 2,800-5,000 pounds with horsepower ranging from 150 to over 600.