14,272 ft / 4,350 m

#14 in Colorado

#36 in United States


2,365 ft / 721 m

#39 in Colorado

#548 in United States


52 summits

#35 in Colorado

#440 in United States

Top climbing months

July   30%

August   21%

September  17%

Most climbed route

Northeast Ridge


  • Castle Peak is the highest Colorado 14er in the Elk Range and resembles an eroded castle.
  • The best climbing months are June, July, August, September through the Montezuma Glacier, a permanent snowfield between Castle and Conundrum Peaks.
  • There are two standard routes for ascent: 1) The Northwest Ridge features a moderate snow climb followed by an easy ridge scramble. 2) The Northeast Ridge features an easy snow climb, but slightly harder scrambling and route-finding once on the ridge. This route offers great glissading.
  • Conundrum Peak, a sub-summit of Castle Peak above 14,000 feet, is often climbed in conjunction with Castle Peak but since it doesn't satisfy the 300 ft promimence cutoff it is not included in the popular 14er challenge.