A 28-year old woman has died after falling from the Half Dome at Yosemite National Park.

Park spokeswoman Kari Cobb told the Associated Press that Haylee LaFlamme of San Ramon, Calif., was hiking with three friends on Sunday when she slipped while descending the enormous granite dome, falling on the shoulder of the dome.

Cobb said she believed the granite was particularly slippery due to rain.

Hikers are discouraged from climbing the Half Dome in rainy weather, because rain can make the granite dangerously slick, and also because thunderstorms can pose a serious risk to those climbing iron cables.

Sunday's death is the 14th this year. The number is usually between five and six by August.

On July 16, three people were presumed dead after being swept over Yosemite's Vernal Fall. The three church group members had climbed over a protective barricade to pose for a picture. Their bodies have not been found.