EXPN.com

Online version of ESPN's action sports network covering skateboarding, snowboarding, surfing, inline skating, BMX, MotoX, and X Games. Includes photos, events, tricks and tips, athlete columns, biographies, videos, and contests.
http://expn.go.com/

Camp Woodward

Features tips and tricks for inline skating, skateboarding, and freestyle BMX racing.
http://www.woodwardcamp.com/

Grindco

Specializes in all aspects of extreme sports entertainment; from conception, to marketing, to onsite production and operations. Specializes in skateboarding, snowboarding, ski jumping, BMX, motor scootercross, and personal watercraft racing.
http://www.grindco.net

Federation for Sport at Altitude

Covers high-altitude sports such as skyrunning, skyski, skybike and sky raid. Site contains a calendar of upcoming events, related links, news items and membership details.
http://www.fsa-sky.org/

Extreme Bros

Features BMX, climbing, skateboarding, snowboarding, surfing and wakeboarding. Includes news, events, forums, photos, videos, tricks and tips.
http://www.extremebros.com/

Street Active

Free 'Learn to Ride' clinics in skateboard, BMX, inline speed skating and inline hockey by accredited coaches.
http://www.streetactive.org/

Ekstremsportveko

Norwegian extreme sports week involving base jumping, skydiving, paragliding, rafting, kayak, climbing, and mountainbike. Includes photos, results, videos, and sign up information.
http://www.ekstremsportveko.com/

Kiiking

A new sport-art from Estonia. Features history, events, mission, photo gallery and services.
http://www.kiiking.ee/

Point X Camp

An action sports camp for kids located in Southern California and specializing in skateboarding, BMX, inline and motocross. Includes camp summary, dates, location, contact information, fees, application, equipment requirements, and image gallery.
http://www.pointx.com

Adventure Sports

Covers activities such as mountain biking, surfing, rock climbing, sailing, snowboarding, and surfing.
http://www.suite101.com/welcome.cfm/adventure_sports/

Ripboard

Features photos, video clips, general information, and equipment of riverboarding whitewater at face level.
http://www.ripboard.com/

Air Above Water

About worldwide cliff jumping. Includes photos, jumpers profiles, and directions to each jump site.
http://www.airabovewater.com