A rescue squad last night found the five people on board the plane in good condition on Knik Glacier, roughly 40 miles northeast of Anchorage.
Alaska National Guard spokesman Maj. Guy Hayes says rescuers had been trying to reach the plane since Sunday afternoon when the aircraft's locator beacon went off.
The rescue team will stay with the sightseers until they can be removed by helicopter when the weather clears.
Hayes says there are minor injuries among the Alaskan pilot and four visitors from Texas. Names and hometowns were not immediately released.
The Anchorage Daily News identified the pilot as 49-year-old Donald Erbey, who had taken his father's plane on a sightseeing trip from Palmer, north of Anchorage.
Hayes says family members believe the plane hit a downdraft and that caused it to crash.