In a new program of national service conducted from June through August 2008, the OA offered "ArrowCorps5" to both youth and adult Arrowmen. Described as "one of the largest conservation efforts in Scouting's history" by the Boy Scouts of America, approximately 3,500 Arrowmen converged on five national forests to work on various conservation projects such as building new trails and helping preserve nearly extinct species, as well as removing invasive species, in cooperation with the U.S. Forest Service. The five national forests are: Mark Twain National Forest, Manti-La Sal National Forest, George Washington and Jefferson National Forests, Shasta-Trinity National Forest and Bridger-Teton National Forest.