Fort Collins Old Town Marathon - A run down the scenic Cache La Poudre River Canyon. Includes course information, registration details, travel tips, and training recommendations. - http://ftcollinsmarathon.com
Durango Marathon - Course map, calendar of events, and travel information. - http://www.durangomarathon.com/
Leadville Trail Marathon - Also offers 100 mile, 10k and mountain bike races. Includes race details, registration, merchandise and links. - http://www.leadvilletrail100.com