Join award-winning extreme sports photographer Thomas Opre on a mud-drenched journey through North America's toughest 4x4 runs. Opre's cameras follow ATV riders as they slog through muck and negotiate rock in their quest for the ultimate thrill. The action takes place in Texas' deepest mud, Moab, Utah's most unforgiving rock gardens, and British Columbia's harshest mountain peaks before wrapping up at the 2007 Highlifter ATV Mud Nationals.