Learn everything you need to know about avalanches, snow safety and rescue at the Silverton Avalanche School in Silverton, Colo. Two levels of training are available, both with field sessions, over three weekends in January and February. Call the San Juan County Sheriff's Office at 970/387-5531 (only between 9 a.m. and 4 p.m., Monday through Friday), write Silverton Avalanche School, P.O. Box 178, Silverton, CO 81433, or visit www.silverton.org/avalanche.html.