Spring ultramarathons in Wisconsin, United States

Frozen forests, slippery sidehills, rugged ravines, and nearly 1,000 feet of elevation gain per 5K lap on logging roads and deer trails at a working maple farm

Point-to-point 50K on the Northern Kettle Moraine Ice Age Trail, with glacial landscapes, classic trail terrain, and early-season spring conditions.

55-mile spring relay from Oshkosh to downtown Green Bay, with lakeside shoreline, Calumet County countryside, and a long Fox River Trail section

Certified loop course with officially measured 50K and 100K routes, built for fast benchmark performances and a competitive race-day atmosphere.

Scenic 50k course in Governor Dodge State Park with 4,000 feet of elevation gain, multiple aid stations, and Driftless Area landscapes

Ice Age Trail out-and-back with Circle Loop bookends, varied hills, roots and rocks, and a flagged route requiring careful navigation

Flexible solo or relay race on three loop options through Kettle Moraine State Forest, with distance-based results and prize payouts for top finishers

Scenic 4.167-mile trail loop in Sylvan Park, repeated hourly under classic Backyard Ultra rules

Scenic Ice Age Trail route through Southern Kettle Moraine Forest, featuring diverse terrain, rolling hills, forests, prairies, and glacial formations.

Flat ATV trails, single lane paths, paved and dirt roads with minimal elevation changes from Wild River Campground in Northern Wisconsin

Backyard ultra on a Wisconsin Driftless dairy farm: a short, steep Drifty Mile loop with 250+ ft of climbing per lap and reversing direction

Challenging multi-loop 50K on scenic Kettle Moraine trails, alternating directions each lap, with aid station and drop bag access at start/finish

Out-and-back on the Badger and Sugar River rail trails: flat, soft surfaces, scenic vistas, trestle bridges, and a quarter-mile tunnel.

Looped ultra marathon on the 1.01-square-mile UW–Stevens Point campus in Portage County, supporting the UWSP Cross Country Team