It's relatively easy to get involved in mountain biking. Get a bike, helmet, and some other necessaties and hit the trails. Bike reviews and other information can be found at Mountain Bike Review.com

Rock climbing and kayaking require more instruction.

Several classes are offered in both, but one of the best ways to learn is to meet someone already involved in the sport. Chances are, they won't have a problem showing you the ropes -- or the boats -- if you're willing to learn.