Ultramarathon Events in the United States

• Colorado
• North Carolina

• Elkhorn Endurance Runs  - Includes the historical background of the organizing body. With the pictures on the actual running competition.
• The Grasslands Run  - Presents the categories in the competition including the marathon and half marathon races. With an updated results of the competitions held.
• JFK 50 Miler  - Shows information about the participating teams. With the results of the races participated and the awards presented to the winning team.
• Le Grizz Ultramarathon  - Presents a schedule of the regular race competitions. With information on the running distance of the race.
• Massanutten Mountain Trails 100 Mile Run  - Shows the mountainous race course of the participating athletes. With contact information for those who are interested to join.
• Mountain Masochist 50 Mile Trail Race  - Provides an archive of the competition's results, race reports, and pictures of the past and current leagues.
• Red Mountain 50k  - Ultramarathon event in Utah. Provides race, course, volunteer, and contact information.
• Wasatch Front 100 Mile Endurance Run  - Holds running competition each first weekend after Labor Day every year. With the description of the race routes.
• Where's Waldo 100K Ultramarathon and Relay  - Highlights the location of the loop-type course race. With the awards given based on the category participated in.