Complex sentence: The NHOC typically offers two to three trips each weekend which include a variety of activities, such as canoeing, rock climbing, caving, skydiving, snowshoeing, downhill and cross-country skiing, and mountaineering.
Split into simpler sentences: The NHOC typically offers 2 to 3 trips each weekend which include a variety of activities. In the past included canoeing, rock climbing, caving, skydiving, snowshoeing, downhill and cross-country skiing, and mountaineering.