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Routes
Hiking trails & Routes
United States
Colorado
Boulder County
Boulder

Shanahan North Fork Trail to Mesa Trail Loop

Moderate

4.5

(2283)

18,589

hikers

Shanahan North Fork Trail to Mesa Trail Loop

03:29

11.5km

400m

Hiking

Embark on the Shanahan North Fork Trail to Mesa Trail Loop for a moderate hike that spans 7.2 miles (11.5 km). You will gain 1307 feet (398 metres) in elevation, typically completing the route in about 3 hours and 29 minutes. As you hike, you will experience a diverse landscape,…

Last updated: April 23, 2026

Tips

Your route passes through a protected area

Please check local regulations for:

Waypoints

A

Start point

Bus stop

Get Directions

1

10.8 km

Shanahan Hill

Highlight • Summit

B

11.5 km

End point

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Way Types & Surfaces

Way Types

11.0 km

361 m

109 m

< 100 m

Surfaces

11.1 km

280 m

112 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 (1,970 m)

Lowest point (1,730 m)

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Weather

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Today

Wednesday 27 May

18°C

11°C

85 %

Additional weather tips

Max wind speed: 13.0 km/h

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This route was planned by komoot.

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Frequently Asked Questions

How long does it take to hike the Shanahan North Fork Trail to Mesa Trail Loop?

The full loop, as described, typically takes around 3.5 hours to complete. This duration can vary based on your pace and how often you stop to enjoy the views.

What is the terrain like on this loop trail?

The terrain is quite varied, offering a diverse hiking experience. You'll traverse through shaded ponderosa pine forests and open savannahs, with some sections providing expansive views. The North Fork Shanahan Trail itself features gentle climbs and a steady incline, while integrating with the Mesa Trail can introduce more challenging sections, contributing to the overall moderate difficulty of the loop.

Are there any notable viewpoints or landmarks along the route?

Yes, hikers can expect beautiful scenery throughout the loop, including consistent and often stunning views of the iconic Flatirons. You'll also pass by Shanahan Hill, a notable summit along the way. Depending on the season, you might also see vibrant wildflowers and the gurgling waters of Bear Creek.

Is the Shanahan North Fork Trail to Mesa Trail Loop dog-friendly?

Yes, this loop is generally dog-friendly. Dogs are allowed on leash, making it a popular choice for pet owners looking to enjoy the outdoors with their canine companions.

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

Many sections of this trail system, including the Shanahan Ridge Loop, can be hiked year-round. However, spring and fall offer pleasant temperatures and beautiful scenery, with spring bringing wildflowers. Winter hiking is also possible, but be prepared for snow and ice, especially in shaded areas.

Do I need a permit or is there an entrance fee for this area?

The Shanahan North Fork Trail and Mesa Trail are part of the City of Boulder Open Space and Mountain Parks (OSMP) system. Generally, there are no entrance fees for hiking on OSMP trails. However, specific regulations or permits might apply for certain activities or areas. It's always a good idea to check the official Boulder OSMP website for the most current information regarding permits or regulations before your visit.

Where can I park to access the Shanahan North Fork Trail to Mesa Trail Loop?

Access to the Shanahan North Fork Trail is typically from trailheads in south Boulder. Parking is available at designated trailheads serving the Shanahan Ridge area. Due to the popularity of these trails, especially on weekends, parking lots can fill up quickly. Arriving early in the morning is often recommended to secure a spot.

What kind of wildlife might I encounter on the trail?

The diverse habitats along the loop mean you have a chance to spot various wildlife. Common sightings include deer. While less frequent, black bears and mountain lions are also known to inhabit the area, so it's important to be aware of your surroundings and practice wildlife safety.

Does this trail connect to other well-known paths?

Yes, this route is part of a larger network. The Shanahan North Fork Trail connects directly to the wider Mesa Trail system, allowing for longer and more varied hiking options. The loop itself incorporates significant sections of the Mesa Trail, Shanahan - North Fork Trail, Towhee Trail, and Homestead Trail, offering excellent connectivity within the Boulder OSMP.

Is this loop suitable for beginner hikers?

While the Shanahan North Fork Trail itself has sections considered easy to medium with a steady incline, the full loop combining it with the Mesa Trail is rated as 'moderate'. This means it might be moderately demanding for absolute beginners due to its length and elevation gain. Hikers with some experience or those looking for a bit of a challenge will find it enjoyable.

Are there any specific regulations for hiking in Boulder's Open Space and Mountain Parks?

Yes, as part of the City of Boulder Open Space and Mountain Parks (OSMP), there are regulations in place to protect the natural environment and ensure a positive experience for all visitors. These often include rules about dogs (leash laws), staying on marked trails, packing out all trash, and respecting wildlife. Always check the official bouldercolorado.gov/osmp website for the most current and detailed regulations before your hike.

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