0 the sport or activity of riding a mountain bike (= a bicycle for riding over hills and rough ground):
Most of the 70 miles of trail that wind around Greylock are open for mountain biking.
Keith Bontrager is one of the founding fathers of mountain biking.
Available activities include camping, boating, fishing, waterskiing, horseshoes, interpretive activities, wildlife viewing, and mountain biking.
Activities offered include hiking, horse riding, rock-climbing, fishing and mountain-biking.
There are 4.7 mi of hiking/mountain biking/horseback riding trails that are located on the project lands.
Attractions include secluded beaches and miles of old logging roads perfect for mountain biking.
Most mountain biking takes place on dirt roads, trails and in purpose-built parks.
