The Tour of the Rio Grande Bicycle Century is an annual spring cycling tour in New Mexico, USA. It continues a long tradition of cycling in the Rio Grande Valley to riders in the Southwest and beyond. The ride is the flattest in the state starting from the Bernalillo County / International Sunport Rail Runner Station off of Rio Bravo Blvd in the South Valley of Albuquerque. It then goes south to Los Lunas, Isleta Pueblo, Belen and Bernardo where it loops back. Optional distances are 39, 62, 78 and 100 miles. Riders will enjoy the scenic, more relaxed side of New Mexican life.