Salt and Sulfur 420

The Salt and Sulfur 420 is a challenging 420-mile ultramarathon starting in Salt Lake City, Utah, and finishing in West Yellowstone. The course features a mix of urban running and trail sections, passing through scenic landmarks such as the Wasatch Range, Ogden Canyon, Logan Canyon, Bear Lake, Jackson Hole, the Tetons, and Yellowstone National Park. Unlike stage races, participants must be self-supported, sourcing their own resources along the way, though crew support is allowed but not required.

This event emphasizes mental endurance as much as physical stamina, offering a unique and demanding experience for ultra-distance runners seeking a profound personal challenge. Visit the organization's website for the most recent information.