Twin Sisters Slide

(Image credit: Jonathan Godt, USGS)Heavy mid-September rains in northern Colorado caused landslides along with flooding. This slide occured on the northwest flank of Twin Sisters Peak near Rocky Mt. National Park near Aspen Lodge.

Saint Malo Retreat Center

(Image credit: Heidi Koontz, USGS)Trees turned to matchsticks by a landslide near the Saint Malo Retreat Center in Allenspark, Colo.

Colorado Debris Flow

(Image credit: Heidi Koontz, USGS)Hundreds of landslides and debris flows like this one at the Saint Malo Retreat Center in Allenspark, Colo., occured during the floods of September 2013.

Close Call

(Image credit: Heidi Koontz, USGS)The Saint Malo Retreat Center in Allenspark, Colo., barely missed being hit by a landslide caused by heavy rains.

Jamestown Flood

(Image credit: Heidi Koontz, USGS)Debris in Jamestown, Colo., after flooding created landslides in the mountain town.

Boulder Canyon Damage

(Image credit: Heidi Koontz, USGS)Debris flow damage in Boulder Canyon in the wake of September's Colorado floods.