Triathlon is booming. Here's why you should dump your ordinary routine and make the switch, too.
Want to do a triathlon? Start with a sprint.
Five ways to make the most of your first sprint triathlon race
Outside picks the best outdoor digital media for the Endurance Freak.
Outside's Gear Guy breaks down the essential features of a good commuter bike and recommends his favorites.
“Thirst is an exquisitely finely tuned indicator of your body’s actual hydration status,” Dr. Winger says. “Listen to it.”
Welcome to the frozen, on fire, wet, barb-wired world of Tough Mudder—where adventure racing starts to look a lot more like hazing
Andy Thom, Alex Patterson, and Jim Nix share advice for running your first Tough Mudder
Everything you need to finish strong
Outside picks the best running blogs of 2011, including Amby's Burfoot's Peak Performance blog at Runner's World
Learn how to control your body temperature and boost performance with a pre-workout routine American Cyclist Peter Stetina swears by.
With temperatures below zero, more than 4,500 feet of climbing, and 9,400 competitors, Wisconsin’s American Birkebeiner is the largest and one of the toughest cross-country ski races in the United...
Cross-country skiers share the 12 secrets of a successful Birkebeiner race
Pick the right fuels so you don't skid to a halt during America's biggest cross country ski race
Coach Bill Pierce's 16-week plan to prepare you for America's biggest cross-country ski race