December ultramarathons in Alabama, United States

Technical multi-lap course through Oak Mountain State Park, starting and finishing by Tranquility Lake

Two-mile looped trail along the Chattahoochee River with self-serve aid stations and a community-focused, no-frills atmosphere

3-mile loop course with 3,500 feet of elevation change, rugged terrain, and unpredictable weather at Huntsville Cross Country Running Park

Flat, fast 5-mile loop in Oak Mountain State Park; runnable trail format with frequent support access for 50K to 100-mile distances.