WEC 51: Aldo vs. Gamburyan was a mixed martial arts event held by World Extreme Cagefighting that took place on September 30, 2010 at the 1stBank Center in Broomfield, Colorado. This was the only event that the WEC hosted in Colorado.

The 1stBank Center was a multi-purpose arena located 15 miles northwest of Downtown Denver, in the city of Broomfield. It was located near the Rocky Mountain Metropolitan Airport and the Flatiron Crossing Mall. Opening in 2006, the arena naming rights belonged to 1stBank, a local financial institution since 2010. The venue was typically used for mid-sized concerts in the Denver Metro area, seating up to 6,500 patrons. From June 2010 until May 2014, the arena housed the Colorado Music Hall of Fame before it moved to its permanent home at the Red Rocks Amphitheatre. For sports, it was the home of the Denver Roller Dolls and former home of the Rocky Mountain Rage and Colorado 14ers.