The Mason Fire is now 100 acres.
 / FOX21: Adam Jukkola
CUSTER COUNTY, COLO. -- The man who died in a plane crash Sunday in Custer County has been identified.
The pilot, 50-year-old Sidney Emmert, died on impact when his small 1941 Steerman biplane went down in the San Isabel National Forest around 3:30 p.m.
The passenger, Dr. Robert Hamilton of Wetmore, Colo. was treated for a head injury and released from Memorial Hospital Monday.
Emmert was from Oklahoma City and had flown out to Colorado to visit friends, one of them being Hamilton. He and Hamilton were flying over Hamilton's ranch when the plane went down.
Hamilton was able to crawl out of the plane and get to a nearby neighbor's house. The neighbor drove Hamilton to the hospital.
Emmert had more than 30 years of flying experience. His family has been notified, and his wife had driven from Oklahoma City to Colorado and was in the state when the crashed happened.
The crash also started a wildfire that is now 100 acres. The Mason Fire is zero percent contained, but U.S. Forest Service Fire Information Officer Gregg Goodland said he thinks they will be able to get a good handle on the fire.
Crews have put retardant along all fire lines and are working against high temperatures and low humidity to fight the fire.
About six 20-person hand crews are on scene, but they aren't using aircrafts as of Monday morning.
The fire is not far from where the massive Mason Gulch Fire burned five years ago.