Mount Lemmon

Mount Lemmon is in the Santa Catalina Mountains located in the Coronado National Forest north of Tucson, Arizona. At the peak of Mount Lemmon is an astronomical observatory. The Catalina Highway, also called the Mount Lemmon Highway, runs up the Santa Catalina Mountains from the east side of Tucson up to Summerhaven, at the top of Mt. Lemmon. The beautiful, curving road is a favorite drive for tourists, motorcyclists, and cyclists, and has been recently designated as the Sky Island Parkway. A dirt access road to the summit on the "back side" of Mount Lemmon offers a secondary route to the top.

Mount Lemmon SUMMIT LOG peakery first ascent by susanjoypaul

23 members report climbing or hiking to the summit, most recently on May 10, 2014. Below are trip reports and shared pictures from their climbs. Based on the summit log, the most popular climbing routes and hiking trails to the summit are Summit Trailhead Rd. from Ski Valley, Main trail from the Whitney Portal and Phoneline trail to Box Camp Trail to Summit trail.

Others who’ve summited Mount Lemmon

  • hauteroute
  • susanjoypaul
  • nancysagar
  • Hambone842005
  • SDHiker
  • azbella
  • lonewolf5577
  • justin.thornburg2
  • edwandall
  • robblevin
  • PrincessDi

Routes Used trails & approaches

33% Summit Trailhead Rd. from Ski Valley

26% Main trail from the Whitney Portal

20% Phoneline trail to Box Camp Trail to Summit trail

13% Catalina Highway

6% FS8 to FS5 to FS44 to FS12 to FS5 to summit


SNAPSHOTedit info


9,157 ft / 2,791 m


5,157 ft / 1,572 m

Height Rank Range

Santa Catalina Mountains


Arizona, United States

Summited by

see all
  • hauteroute
  • susanjoypaul
  • nancysagar
  • Hambone842005
  • tjjohnson
  • SDHiker
  • millerc686
  • Christopher
  • d2pans
  • azbella
  • lonewolf5577
  • christopher.schiller

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