Hallett Peak (12,713′), Front Range

Hallett Peak (12,713′), Front Range

Hallett Peak (12,713')

Hallett Peak (12,713′), Front Range

Hallett Peak, viewed from east Rocky Mountain National Park, is distinctive with it’s slanted square structure towering over the landscape. As you near the summit however, the square melts away and you are left looking at a more traditional mountain silhouette.

Rising along the Continental Divide, Hallett Peak divides Chaos Canyon to the south and Tyndall Gorge to the north.

The route to the summit first traverses the summit of Flattop Mountain on a well maintained trail. The Arapaho Indians called the Flattop Mountain corridor “The Big Trail”.

The trail was formally constructed in 1925, was rehabilitated by the Civilian Conservation Corps in 1940, and is currently listed on the National Register of Historic Places.

Destination: Hallett Peak
Trailhead: Bear Lake
Round trip: 10 miles / 16.1 km
Elevation: 9,475′ – 12,713′ (+3,238′)/ 2,888m – 3,875m (+987m)

County: Larimer
Agency: National Park Service
Nat’l Park: Rocky Mountain

Elevation Map (select to enlarge)

GPS Route with Elevation

Video Tour

Trail Directions

From Bear Lake take the well maintained Flattop mountain trail to the summit of Flattop Mountain. No maintained trail reaches Hallett Peak, so cross the saddle above Tyndall Glacier and scramble up steep talus to the summit.

Trailhead Directions

Lake Helene (10,630′), Front Range

Lake Helene (10,630′), Front Range

Notchtop Mountain towers over the valley

Lake Helene (10,630′), Front Range

There is no signage and you must follow a social trail to get to the lake, but despite it’s obscurity, Lake Helene is a spectacular destination inside Rocky Mountain National Park. The lake is situated at treeline, between Flattop Mountain (12,324′) and Notchtop Mountain (12,129′).

Even lesser known Two Rivers Lake is a short walk from Lake Helene, and also worth the visit while in the alpine valley.

Destination:  Lake Helene
Trailhead: Bear Lake
Round trip: 7.2 miles / 11.6 km
Elevation: 9,475′ -10,630′ (+1,155′)/ 2,888m-3,240m (+352m)

County: Larimer
Agency: National Park
Nat’l Park: Rocky Mountain

Elevation Map (select to enlarge)

GPS Route with Elevation

Video Tour

Trail Directions

Follow the Bear Lake trail for less than 1/2 mile to the Odessa Lake Trail Junction and take the trail to the right. The trail climbs above Bear Lake to the Flattop Mountain trail junction. Continue towards Odessa Lake, climbing through forests and meadows. After approximately 3.5 miles from the trailhead you will see social trails on your left for Lake Helene. The lake is partially concealed from the trail and spurs are fairly easy to miss. If you make a sharp hairpin turn north (right) and begin descending, you’ve passed it.

Two Rivers Lake is near treeline just downstream of Lake Helene. A thick forest and boulder field stand between the main trail and lake, making it easier to walk east from Lake Helene through the forest and meadows.

Trailhead Directions

Mills (9,965′) and Jewel (9,990′) Lake, Front Range

Mills (9,965′) and Jewel (9,990′) Lake, Front Range

Cove on Mills Lake eastern shore

Mills (9,965′) and Jewel (9,990′) Lake, Front Range

Located within Glacier Gorge in Rocky Mountain National Park, Mills and Jewel Lake provide dramatic views of the surrounding peaks. The summer route initially takes you to Alberta Falls, another popular destination in the park.

Mills Lake is named in honor of Enos Mills (1870-1914), who is considered the father of Rocky Mountain National Park.

The view from Mills Lake towards Longs Peak is the image used on one side of the 2006 Colorado State Quarter.

Destination: Mills & Jewel Lake
Trailhead:  Glacier Gorge Trailhead
Round trip: Jewel Lake 6 miles/ 9.6 km
Elevation: 9,240′-9,990′ (+750′) / 2,816 m – 3,045 m (+229 m)

County: Larimer
Agency: National Park Service
Nat’l Park: Rocky Mountain

Elevation Map (select to enlarge)

GPS Route with Elevation

Video Tour

Trail Directions

The winter route was utilized , bypassing Alberta Falls and intersecting with the summer trail about 50 ft from the Loch Trail/Glacier Gorge intersection.

Trailhead Directions

Lake Haiyaha (10,244′), Front Range

Lake Haiyaha (10,244′), Front Range

Hallett Peak

Lake Haiyaha (10,244′), Front Range

Lake Haiyaha is located at timberline along Chaos Creek, in the Chaos Canyon drainage, inside Rocky Mountain National Park. Bouldering is a popular activity in Chaos Canyon due to the large boulders left behind by retreating glaciers. It is in close proximity to popular Dream Lake in the park.

Destination: Lake Haiyaha
Trailhead: Bear Lake
Round trip: 4 miles / 6.4 km
Elevation: 9,475′-10,244′ (+769′) / 2,888m – 3,122m (+234m)

County: Larimer
Agency: National Park Service 
Nat’l Park: Rocky Mountain

Elevation Map (select to enlarge)

GPS Route with Elevation

Video Tour

Trail Directions

The trail begins alongside Bear Lake and climbs westward towards Tyndall Gorge, passing Nymph Lake along the way. Past Nymph Lake the trails climbs again to Dream Lake.

Once there, the trail moves up a southward slope into the Chaos Canyon drainage and arrives at Lake Haiyaha, located at timberline along Chaos Creek. The lake and Chaos Canyon are known for excellent bouldering.

Trailhead Directions

Longs Peak (14,255′), Front Range

Longs Peak (14,255′), Front Range

Alpenglow on the Keyhole

Longs Peak (14,255′), Front Range

Iconic Longs Peak (14,259′) is the highest mountain in Rocky Mountain National Park, and the northern most 14,000′ peak in the Rocky Mountains.

The peak is guarded by granite cliffs and does require Class 3 climbing, although the first 6.5 miles before the Keyhole are Class 2. Stepping through the Keyhole is an exhilarating experience, with thousand foot drop offs and endless views.

Destination: Longs Peak
Trailhead: East Longs Peak
Round trip: 14.5 miles / 23.3 km
Elevation: 9,400′-14,255′ (+5,100′) / 2,865m – 4,345m

County: Larimer
Agency: National Park System
Nat’l Park: Rocky Mountain

Elevation Map (select to enlarge)

GPS Route with Elevation

Video Tour

Trail Directions

There are many spectacular ways to summit Long’s Peak, and this description highlights the “standard” Keyhole Route. The route has two sides to it, a long approach with a little scramble to the keyhole, and from the keyhole to the summit which is rated as a Class 3 Grade 3 scramble/climb.

The standard route on Longs Peak is called the Keyhole route and it is usually done in one very long day. It is the route described below.

From the East Longs Peak trailhead follow the well maintained trail through pine forests. You reach a trail junction to Eugenia Mine Trail/Storm Pass after 0.45 miles. Continue straight along the East Longs Peak trail as it turns southwest through dense forest, gaining elevation through steep switchbacks. As the trail turns west, you pass through Goblins Forest, 1.1 miles in, and cross small creeks before climbing more switchbacks. As you approach treeline, you cross beautiful Alpine Brook on a well maintained footbridge, 1.85 miles in.

Leaving Alpine Brook the trail travels south through krummholtz and provides beautiful views of Twin Sisters Peaks to the east. The trail eventually leaves the low growth stands of krummholtz behind and enters alpine tundra, providing spectacular views of Longs Peak Diamond, a 1,000′ sheer cliff. The trail moderately climbs until it reaches Jims Grove Trail Junction, and then turns southwest along the basin until it arrives at Mills Moraine.

Here, there is a trail junction with Chasm Lake 3.25 miles in. Continue to follow the the East Longs Peak trail as it turns northwest going around to the east of Mt Lady Washington, climbing to Granite Pass, 4.3 miles in. At a trail junction on Granite Pass, the North Longs Peak Trail merges from the north. Continue on the East Longs Peak trail as it swings southwest along switchbacks and eventually enters the Boulderfield at the base of Long’s north face, where the East Longs Peak trail ends at a campsite area 5.9 miles in.

From the end of the East Longs Peak trail, the next destination is the Keyhole (.4 miles) to the southwest across the Boulderfield. The Keyhole is a weakness in the ridge between Longs Peak and Storm Peak, providing the only non-technical passage to the west side of the mountain along this route.

Scramble across large granite boulders until close to the keyhole, where the last 100 yards become increasingly steep. The Keyhole is a striking rock feature with a large overhang and a rock shelter built along the southeast side. Stepping through the Keyhole is one of the major highlights of the trip. The spectacular Glacier Gorge with its beautiful lakes and 13,000′ peaks come into view along with a 3,000′ drop. The exposure feels big, and some decide that the Keyhole is far enough. Knowing when to stop is honored wisdom. The way forward from here is much more rugged and dangerous than what has been encountered so far, and marked only with bullseyes.

Once across the Keyhole, turn immediately to the (left) and locate “The Ledges” (0.4 miles, 120′ elev. gain), a horizontal route marked by red and yellow bullseyes. The Ledges gradually head south, up and down over the tops of massive slabs of granite that rise from the side of the mountain. There is a v-shaped notch between boulders, with an iron rod as an aid through the most difficult section.

Next, the Trough (0.3 miles, 600′ elev. gain) consists of steep, rock-filled gully. At the top there is a large boulder jammed between the walls of the Trough as it narrows, blocking the route. Getting around it is one of the most difficult parts of the route.

At the top of the Trough there is a rock shelf called The Narrows (0.2 miles, 120′ elevation gain) providing a route across the near shear south face of the mountain. The ledge is fairly narrow initially, giving this portion of the route its name.

The Homestretch (0.2 miles, 280′ elev. gain) is the last obstacle to the summit, and consists of mostly smooth exposed granite, steep enough to require scrambling on all fours. It is climbed north-northeast to the top of the mountain. A large cairn marks the gateway to the top. The large flat summit is covered with rough talus. Enjoy the incredible views!

Trailhead Directions

Flattop Mountain (12,332′), Front Range

Flattop Mountain (12,332′), Front Range

Flattop Mountain

Flattop Mountain (12,332′), Front Range

Flattop Mountain is located just east of the Continental Divide in Rocky Mountain National Park. The trail was built in 1925, and rehabilitated in 1940 with Civilian Conservation Corps labor. Today it is listed on the National Register of Historic Places.

The scenic trail has overlooks for Dream and Emerald Lake, and unmatched views of the Longs Peak area to the south. The trail is also used to to reach the summit of Hallett Peak.

Destination: Flattop Mountain
Trailhead: Bear Lake
Round trip: 8.6 miles / 13.8 km
Elevation: 9,475′-12,332′ (+2857′) / 2,888m-3,759m (+871m)

County: Larimer
Agency: National Park Service
Nat’l Park: Rocky Mountain

Elevation Map (select to enlarge)

GPS Route with Elevation

Video Tour

Trail Directions

From the trailhead immediately make a right turn onto the Bear Lake Loop Trail. After a short walk along the eastern shore of Bear Lake, make another right turn at the next junction. From here the trail ascends the slopes of the Bierstadt Moraine.

About .5 miles from the trailhead you’ll reach the Bierstadt Lake and Mill Creek Basin junction. Turn left and continue towards Flattop Mountain. The route turns west as it climbs higher and you’ll enjoy spectacular views of Longs Peak, the Keyboard of the Winds, Pagoda Peak and Chiefs Head Peak towards the south. At just over 1 mile from the trailhead you will arrive at the Flattop Mountain Trail junction, which forks off to the left and begins ascending the eastern slopes of the mountain.

Once on the Flattop Mountain trail, the climb becomes steeper for the rest of the route. About 1.5 miles from the trailhead (~10,500 feet) you will reach the Dream Lake Overlook. Once leaving the Dream Lake overlook it’s a short hike to tree-line. Looking towards the east are views of Bierstadt Lake, Sprague Lake and much of the Glacier Basin area.

After about 3 miles from the trailhead you’ll reach the Emerald Lake Overlook. This scenic overlook rises more than 1,200′ above Emerald Lake. Continue on for less than a mile and you will be just below the summit of Flattop Mountain where there is a horse hitch. The slope begins to become more gradual and eventually leveling out. The end of the Flattop Mountain Trail is at the junction with the North Inlet Trail and Tonahutu Creek Trail. Although there are no signs indicating that you’re at the top, this is the unofficial summit of Flattop Mountain.

Trailhead Directions