Located east of Brainerd, near the towns of Crosby and Ironton, Cuyuna Country State Recreation Area is part of the Minnesota State Park and Recreation Area system. Across 800 acres and skills challenge areas, CCSRA hosts over 25 miles of singletrack trail riding making it world-class for mountain biking. This park is endorsed by the International Mountain Bicycling Association for beginners, intermediates and experts. As one of Minnesota's newest State Recreation Areas, Cuyuna's 5,000 acres are mostly undeveloped. The areas was developed to rehabilitate a portion of the Cuyuna Range where mining pits and piles of waste rock were left behind after decades of open-pit mining for iron ore. Abandoned by mining companies more than 30 years ago, the mine pits have naturally filled with water and one, Portsmouth Mine Pit Lake, is considered the deepest lake in Minnesota, a favorite among kayakers and scuba divers in the summer and sledders (as you can see) in the winter.