2013 Adequan® AERC National Championship City of Rocks - Almo, Idaho (Northwest Region) September 20 (50) and 22 (100), 2012 National Championship Qualification Requirements for 2013 All entries must meet AERC qualification criteria: 50-mile ride: 300 lifetime miles (horse) AND 300 lifetime miles (rider), with at least 100 miles together. The mileage requirements must be met with endurance competitions of 50 miles or more only -- no limited distance miles count towards qualification criteria. 100-mile ride: 500 lifetime miles (horse) AND 500 lifetime miles (rider), with at least one 100 mile, one-day ride together. The mileage requirements must be met with endurance competitions of 50 miles or more only -- no limited distance miles count towards qualification criteria. Alternate qualification (either distance): If the horse and rider team has completed 1,000 AERC endurance miles (rides 50 miles or more only) they are qualified to enter.  To view your Ride History, click here or phone the AERC office, 866-271-2372.