A spokesperson for the Pitkin County Sheriff's Office says another hiker called in the fall about 9:30 a.m.
The caller told dispatch a man had fallen about 300 feet off the peak. When search and rescue crews arrived, they found the man had fallen 600 to 1,000 feet and was not responsive. A helicopter arrived around 12:15 p.m. to retrieve the hiker's body.
Pitkin County authorities believe the hiker was traveling alone, but may have been meeting up with the caller at the summit. The hiker is described as an adult male, possibly in his 30's.
Maroon Peak is in the White River National Forest southwest of Aspen.