Northern Tier High Adventure is a collection of high adventure bases run by the Boy Scouts of America in the Boundary Waters Canoe Area Wilderness of Minnesota, Ontario's Quetico Provincial Park and Canadian Crown Lands, Manitoba's Atikaki Provincial Wilderness Park, Woodland Caribou Provincial Park, and points beyond. Northern Tier is the oldest of the four National High Adventure Bases operated by the Boy Scouts of America; the others currently in operation are Philmont Scout Ranch in New Mexico, Florida Sea Base in the Keys, and The Summit in West Virginia. Programs at Northern Tier vary by season. In the summer, participants undertake wilderness canoe excursions. There are no lodgings along these trips, and aircraft and motorboats are heavily restricted. Typical treks may cover 50 to 150 miles and take 6 to 10 days, with a maximum duration of 14 days. Accompanying each crew is a staff member called an "Interpreter", formerly known as a "Charlie Guide". Programs and bases Northern Tier consists of the following bases: Charles L. Sommers Canoe Base on Moose Lake in Ely, Minnesota offers canoe trips to the Boundary Waters and the Quetico. Donald Rogert Canoe Base in Atikokan, Ontario Canada offers canoe trips into the Quetico and Crown Lands. Northern Expeditions Base in Bissett, Manitoba offers canoe trips into the 2.5 million acres combined Atikaki Provincial Park and Woodland Caribou Provincial Park. All trips here start with a float plane trip to the drop off point and canoe cache. Other programs Most typical are summer canoe trip programs, signed up as groups. Other programs include: Fall Rendezvous offers a chance for crews to experience the Boundary Waters in the fall. The National Cold-Weather Camping Development Center is located at the Charles L. Sommers Base. The center provides materials for, and specializes in problems associated with, cold-weather camping for councils and other organizations. In the winter, the Okpik program is offered, with activities such as cross-country skiing, dog sledding, snow shoeing, ice fishing, and shelter building. The OA Wilderness Voyage, organized by the Order of the Arrow does work on the portage trails in the Boundary Waters area. In 2009, the program was expanded to include trips into the Quetico. History The Northern Tier programs began in 1923 with canoe trips organized by the Hibbing, Minnesota Council, and was called Region X Canoe Trails. This was later changed to the Region X Wilderness Canoe Trips. In