Ultra-Race sponsor offers winter competitions in skiing, foot racing, snowshoeing and biking. Find course advisory and registration deadlines.

This 20-hour adventure race convenes in Hawaii and includes mountain biking, kayaking, mountaineering and hiking. Find photos and news.

Organizes multisport endurance events, and provides training for teams seeking to compete and win. Email an inquiry to the management.

Explains the structure and objectives of this Canadian race, and provides details on past events. Submit an electronic form to register.

100-mile race over seven days from Deep Cove to Whistle, British Columbia in Canada. Find registration, course descriptions, a calendar and fees.

Learn about the upcoming race and its course layout. Read articles about past events, and find out how to compete.

Provides details on this event's team and solo competitions, and offers logistical assistance for those traveling to the Isles to participate.