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Routes
Hiking trails & Routes
United States
Colorado
Boulder County

Lake Isabelle via Pawnee Pass Trail

Moderate

4.6

(7339)

15,162

hikers

Lake Isabelle via Pawnee Pass Trail

02:50

9.38km

190m

Hiking

Embark on the Lake Isabelle via Pawnee Pass Trail, a moderate hike spanning 5.8 miles (9.4 km) with an elevation gain of 614 feet (187 metres). You can expect to complete this route in about 2 hours and 50 minutes. The trail guides you through serene pine forests and open…

Last updated: April 23, 2026

Tips

Your route passes through protected areas

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Waypoints

A

Start point

Parking

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1

6.33 km

Isabelle Lake

Highlight • Lake

Isabelle lake still has lots of water, later in September it has often very low water

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2

8.37 km

Long Lake

Highlight • Lake

Long Lake is an alpine that sits over 10,000 feet in elevation. It's surrounded by a beautiful backdrop of the Indian Peaks. The shore around the lake is a great spot to see moose and wildflowers in the summer.

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B

9.38 km

End point

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Way Types & Surfaces

Way Types

5.28 km

3.24 km

674 m

152 m

< 100 m

Surfaces

8.50 km

827 m

< 100 m

< 100 m

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Elevation

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (3,320 m)

Lowest point (3,150 m)

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Weather

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Wednesday 6 May

-3°C

-13°C

0 %

Additional weather tips

Max wind speed: 16.0 km/h

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This route was planned by komoot.

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Frequently Asked Questions

How do I access the trailhead for this hike, and what are the parking options?

The trail begins at the Long Lake trailhead within the Brainard Lake Recreation Area. Due to its popularity, especially during peak season, timed entry permits for the Brainard Lake Recreation Area are typically required. Parking is available at the trailhead, but it fills up very quickly. Arriving early in the morning is highly recommended to secure a spot.

Are there any permits or fees required to hike this trail?

Yes, the trail is located within the Brainard Lake Recreation Area, which typically requires timed entry permits during peak season. There is also an entrance fee for the recreation area itself. It's advisable to check the official USDA Forest Service website for the most current information on permits, fees, and reservation requirements.

Is the Lake Isabelle via Pawnee Pass Trail dog-friendly?

Yes, dogs are generally allowed on this trail. However, they must be kept on a leash at all times to protect wildlife and ensure a pleasant experience for all hikers. Always remember to pack out any waste.

What is the best time of year to hike this trail?

The best time to hike is typically from late spring to early fall (June through September) when the trail is mostly free of snow and wildflowers are in bloom. However, snow can persist at higher elevations, especially towards Pawnee Pass, late into the summer. Fall offers stunning aspen colors. Always check current trail conditions before heading out.

What is the terrain like on the way to Lake Isabelle and beyond to Pawnee Pass?

The initial section to Long Lake is wide and relatively flat, passing through pine forests and quaking aspens. As you ascend towards Isabelle Lake, the trail gradually gains elevation through wooded terrain with a short climb just below the treeline. Beyond Lake Isabelle, the path to Pawnee Pass becomes significantly more challenging, featuring sustained climbing, rocky conditions, graded switchbacks, and potentially muddy fields and large boulders. This segment ascends above the treeline and can retain snow late into the summer.

What kind of scenery and landmarks can I expect to see on this hike?

You'll experience spectacular alpine views throughout. Early sections offer lush forests and meadows with wildflowers, and views of the Continental Divide. You'll pass Long Lake with views of Niwot Ridge. Isabelle Lake is a stunning alpine gem, reflecting jagged peaks like Navajo Peak, Apache Peak, and Shoshoni Peak. Higher up towards Pawnee Pass, panoramic views of the Rockies and vast alpine lakes unfold.

Is this trail suitable for beginners or families with children?

The hike to Isabelle Lake is generally considered moderate and can be suitable for active beginners or families. However, extending the hike to Pawnee Pass significantly increases the difficulty, making it a strenuous endeavor due to sustained climbing and rocky, high-altitude conditions. Families with younger children might prefer to turn around at Lake Isabelle.

What wildlife might I encounter on the trail?

The Indian Peaks Wilderness is home to various wildlife. Hikers occasionally spot moose, deer, marmots, and pikas along the route. Remember to observe wildlife from a distance and never feed them.

Given its popularity, how can I best plan my visit to avoid crowds or ensure access?

This is a very popular trail, especially during peak season. To avoid the busiest times and secure parking, it's highly recommended to start your hike very early in the morning, ideally before 7 AM. Additionally, be sure to check and reserve any required timed entry permits for the Brainard Lake Recreation Area well in advance.

Does this route connect with other trails in the area?

Yes, the route also passes through sections of the Little Raven Trail, Jean Lunning Trail, Pawnee Pass Trail, and Niwot Cutoff Trail, offering opportunities for longer or alternative explorations within the Indian Peaks Wilderness.

How does the difficulty change between hiking to Lake Isabelle and continuing to Pawnee Pass?

The hike to Isabelle Lake is considered moderate, involving a gradual ascent through wooded terrain. Continuing beyond the lake to Pawnee Pass significantly increases the difficulty. This segment involves sustained, steep climbing over rocky terrain, often above the treeline, and can be strenuous, requiring good physical condition and sure-footedness.

What should I consider bringing or wearing for this hike?

Given the varied terrain and potential for changing alpine weather, it's wise to bring layers of clothing, including a waterproof outer shell. Sturdy hiking boots are essential, especially if you plan to go beyond Isabelle Lake. Plenty of water, snacks, sun protection (hat, sunglasses, sunscreen), and a map or GPS device are also highly recommended. Trekking poles can be helpful for the steeper sections.

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