Mammoth March Indiana 2025 Schedule. Castile entrance / letchworth state park, 6787 denton corners rd, genesee falls, ny 14427 distance: Learn how to enter, read reviews, get exclusive discounts, see photos, course maps, and results.

20 miles in 8 hours After a sold out first edition in 2024, mammothmarch will be back at silver falls state park on march 22, 2025!