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Cub Lake Loop

  4.3 ( 63 ) Favorite


6.0 mile 9.7 kilometer loop
94% Runnable


Ascent: 635' 193 m
Descent: -633' -193 m
High: 8,685' 2,647 m
Low: 8,063' 2,458 m


Avg Grade: 4% (2°)
Max Grade: 21% (12°)


No Dogs
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Trail shared by Kristen Arendt

A loop from the open meadows of Moraine Park up to Cub Lake and back along the Big Thompson River.

Kristen Arendt

Features Birding · Fall Colors · Lake · River/Creek · Views · Wildflowers · Wildlife


This run incorporates a great mixture of open meadows, scenic rivers and lakes, and mountain views. The first half of the loop does have one short and steep climb to Cub Lake, but otherwise the trail is gradual and well-maintained.


Beginning at the Cub Lake Trailhead, start the run by following the Cub Lake Trail to the south and across the Big Thompson River. You'll continue south along the western side of Moraine Park before turning westward at a junction with South Lateral Moraine Trail.

The trail's grade will remain very manageable as it contours to the west, just north of Sheep Mountain. Once the trail turns southward (left), the grade steepens drastically. This is the short but steep approach to Cub Lake.

Cub Lake makes for a great rest stop or picnic destination. Enjoy the richness of your surroundings before continuing on Cub Lake Trail. The trail descends from the lake for just under a mile to a junction with Fern Lake Trail at the Pool.

From the Pool at the junction take a right onto Fern Lake Trail and descend alongside the Big Thompson River. The canyon through which this trail runs is stunning - the northern wall rises abruptly over 1,000 feet above the valley floor.

Once you reach the Fern Lake Trailhead, continue on the Fern Lake Road for approximately one mile. This road will loop you back around to the Cub Lake Trailhead to finish the run.

Flora & Fauna

Depending on the season, herds of elk and mule deer can be seen grazing in the meadows at Moraine Park.

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Jun 28, 2019
Matt Oldenburg
Jun 18, 2019
Emily Knapp
6mi — 1h 45m
Oct 11, 2017
Gabriel Erso
Amazing loop! A bit icy past Cub Lake until you turn back east on Fern Lake Trail. 6mi
May 21, 2016
Dave Kruse

Trail Ratings

  4.3 from 63 votes


in Moraine Park


  4.3 from 63 votes
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Featured Run Rankings


in Moraine Park


in Colorado


71 Views Last Month
5,489 Since Sep 24, 2015



September 5, 2013 - Elk Rutt
Jan 28, 2015 near Estes Park, CO
Great view of the Big Thompson River.
Jul 20, 2016 near Estes Park, CO
Big Thompson River Waterfall
Apr 16, 2018 near Estes Park, CO
Cub Lake
Aug 18, 2015 near Estes Park, CO
Cub Lake has an awesome Mountain View!
Apr 16, 2018 near Estes Park, CO
Views of Cub Lake on July 18, 2016
Jul 20, 2016 near Estes Park, CO


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