Alpine Skills International (Donner Pass, Calif.) offers programs that cover skiing techniques and backcountry skills. Contact: 530-426-9108; www.alpineskills.com.
American Avalanche Institute (near Jackson, Wyo.) offers avalanche safety courses throughout the West. Contact: 307-733-3315; www.avalanchecourse.com.
Appalachian Mountain Club (New England) gives everything from introductory hut-to-hut tours to advanced winter-mountaineering courses. Contact: 617-523-0636; www.outdoors.org.
Colorado Mountain Club (Denver and Boulder) teaches various courses and leads trips through membership services. Contact: 303-279-3080, ext. 2, then ext. 109; www.cmc.org/cmc.
EMS Climbing School (based in Conway, N.H., with "campuses" in the Catskills, Adirondacks and Boulder, Colo.) provides courses in mountaineering, winter camping, backcountry skiing and technical ice climbing; guided trips. Contact: 800-310-4504; www.emsclimb.com.
Colorado Mountain College (multiple campuses) offers a wide range of options, from one-day seminars to two-year degrees. Contact: 800-621-8559; www.coloradomtn.edu.
North American Ski Training Center (Donner Summit, Calif.) focuses on advanced backcountry skiing skills, including multi-day seminars. Contact: 530-582-4772; www.skinastc.com.
Wasatch Mountain Club (Utah) offers courses, seminars and trips. Contact: 801-463-9842; www.wasatchmountainclub.org.