Many people would consider being suspended from a wall of ice or a sheer cliff to be a bizarre form of torture. For those who think it might be fun, Fantasy Ridge Mountain Guides (28 Village Ct., , Box 405, Placerville, 81430. 970/728-3546. www.fantasyridge.com) offers introductory ice-climbing and rock-climbing courses. A three-day ice-climbing course costs about $900 (lodging included). Rock-climbing classes range from hourly instruction costing $25 to five-day programs that start at $1,120. Many use the famous Ophir Wall. Fantasy Ridge also guides Fourteener climbs and other expeditions in the San Juan Mountains.