Running-Shorts.com

Prickly Pear Trail Races
Trail races in San Antonio on the first weekend in May. 10 mile and 50k races at McAllister Park.
www.pp1050.com/

Leadville Trail Marathon
Also offers 100 mile, 10k and mountain bike races. Includes race details, registration, merchandise and links.
www.leadvilletrail100.com/

Albany Running Exchange
Trail running club based in Albany, New York. Includes summer trail run series, results, calendar, photos, and member news.
www.albanyrunningexchange.org/

eHow to Choose Trails for Trail Running
Tips and information about trail running. Requires free membership.
www.ehow.com/

Two Oceans Marathon
Located in Cape Town, South Africa including a 56K event with registration, course map, rules, message board and news items.
www.twooceansmarathon.org.za/

BC Trail Running
Offers information on trail running in British Columbia, Canada. Includes articles, photos, and links to several trail series.
www.bctrailrunning.com/

Chicago 1/2 Marathon
Features online registration, event information, results, directions and parking information, and expo details.
chicagohalfmarathon.com/

USATF Road Running Technical Council
Oversees course measurement and certification in the United States. Features online manual, application form and searchable course database.
www.rrtc.net/

Running Fit Marathon Training
Tips, advice, schedules and motivational writings concerning Marathon training and racing.
www.runningfit.com/

Cascade Running Club
Hosts 100 mile, 50 Mile and 50K minimalist runs in Washington. Includes club information and race details.
www.cascaderunningclub.com/