Bouldering- Climbing at low height levels without rope. Bouldering generally focuses on problem solving and technique.

Doubletrack- A trail wide enough for two bikes.

Continuous trail- A trail that goes out in one direction. Riders must turn around and return once they reach the end.

Lead climb- A climb where the climbers place anchors into the rock as they go up.

Loop trail- A trail that begins and ends in the same place.

Singletrack- A trail just wide enough for one bike. Considered the best of trails to mountain bike on.

Surf hole-Where the backside of a rapid meets the river. Water moving down the rapid can hold a kayaker in place and be "surfed" like an ocean wave.

Top rope- The most common type of climb in Fairfax. Anchors are at the top of the climb, and climbers climb towards them.

Trail network- A collection of short trails that follow no specific direction, but link together in what would appear to be a jumbled mess.