July 19, 2013: Sadler's Alaska Challenge Stage Four - Time Trial in Denali Park. Michael Postell (Snellville, Ga.) races along the Denali Park road inside Denali National Park during stage four. Postell finished the 10.9-mile stage in 37:23.

July 19, 2013: Sadler's Alaska Challenge Stage Four - Time Trial in Denali Park. Gerard Ah Fook (Tucson, Ariz.) races along the Denali Park road inside Denali National Park during stage four. Ah Fook finished the 10.9-mile stage in 43:30.

July 19, 2013: Sadler's Alaska Challenge Stage Four - Time Trial in Denali Park. Gerard Ah Fook (Tucson, Ariz.) races along the Denali Park road inside Denali National Park during stage four. Ah Fook finished the 10.9-mile stage in 43:30.

July 19, 2013: Sadler's Alaska Challenge Stage Four - Time Trial in Denali Park. Michael Bishop (Beech Island, S.C.) races along the Denali Park road inside Denali National Park during stage four. Bishop finished the 10.9-mile stage in 56:38.

July 19, 2013: Sadler's Alaska Challenge Stage Four - Time Trial in Denali Park. Joseph Beimfohr (Wesley Chapel, Fla.) races along the Denali Park road inside Denali National Park during stage four. Beimfohr finished the 10.9-mile stage in 1:04:27.