JUNEAU, Alaska (July 19, 2013)--The National Park Service says 787 of the 1,151 registered climbers reached the summit of Mount McKinley in Alaska this season, a summit percentage of 68 percent, the highest since 1977, when the summit percentage was 79 percent, the National Park Service said Friday.
In 1977, 284 climbers reached the summit.
The number of climbers to reach the summit has topped 700 in only four other years.
A spokeswoman for Denali National Park and Preserve says good weather was the major factor in whether there's a strong summit year.
She says May and June offered "long stretches of warm temperatures, clear skies and mild winds."
This year marked the 100th anniversary of the first ascent of the mountain's 20,320-foot south summit.
Denali National Park and Preserve: