At approximately 13:30 mountain time, a homebuilt RV-6A departed the runway during takeoff from Stevens Field. The pilot was not injured. The pilot said he was departing on runway 19 and had used 7,500 of the available 8,500 feet when the airplane departed the runway. The airplane traveled another 250 feet and struck a fence. The airports elevation was 7,700 feet and the density altitude at the time was nearly 10,500 feet.