The Sisu Dirt Crew is dedicated to increasing off-road mountain biking opportunities in the Western Upper Peninsula of Michigan through trail building, trail maintenance, preservation of green space, and advocacy. The club is a registered 501(c)(3) non-profit and manages trails at the Copper Peak Ski Flying Hill and Miners Park near downtown Ironwood with plans for a bike park at Mt. Zion on the campus of Gogebic Community College. A yearly fundraising mountain bike race is held at Copper Peak each September and the group hosts weekly group rides and other events.
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