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Routes
Hiking trails & Routes
Ada County
Boise

Harrison Hollow Trail to Who Now Loop Trail

Routes
Hiking trails & Routes
Ada County
Boise

Harrison Hollow Trail to Who Now Loop Trail

Easy

2

hikers

Harrison Hollow Trail to Who Now Loop Trail

01:05

3.70km

90m

Hiking

The Harrison Hollow Trail to Who Now Loop Trail is an easy 2.3 miles (3.7 km) hiking route in Boise's Hillside to Hollow Reserve. You will gain 303 feet (92 metres) in elevation over an estimated 1 hour and 4 minutes. This popular route offers a gentle introduction to the…

Last updated: March 7, 2026

Waypoints

A

Start point

Parking

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1

2.93 km

Harrison Hollow

Highlight • Gorge

Good view over the hollow from the ridgeline. If you plan on hiking here be sure to bring plenty of water and wear a hat as there is little to no shade.

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B

3.70 km

End point

Parking

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Way Types & Surfaces

Way Types

3.46 km

185 m

< 100 m

Surfaces

1.89 km

1.75 km

< 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.

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Weather

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Today

Thursday 23 July

39°C

19°C

12 %

Additional weather tips

Max wind speed: 15.0 km/h

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Frequently Asked Questions

Where can I park to access the Harrison Hollow Trail to Who Now Loop Trail?

You can typically find parking at the Harrison Hollow Lane Trailhead. This trailhead is well-equipped, offering amenities like a drinking fountain and a dog watering station.

Is this trail suitable for beginners or families with children?

The Harrison Hollow Trail section is generally considered easy and suitable for all skill levels, including families. However, the Who Now Loop Trail is rated moderate to intermediate due to some elevation gain and descent. Combining both creates a varied experience, but the overall route is manageable for those with some hiking experience.

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

Spring is particularly beautiful, with vibrant wildflowers like yellow balsamroot. The trail offers picturesque views year-round. While the Harrison Hollow Trail drains well, the Who Now Loop can have packed snow, slush, and mud on north-facing slopes during colder months. It's a good option after rain due to its good drainage.

Are there any permits or fees required to hike in the Hillside to Hollow Reserve?

No, there are typically no permits or entrance fees required to access trails within the Hillside to Hollow Reserve, including this route. It's freely accessible for public enjoyment.

Is the Harrison Hollow Trail to Who Now Loop Trail dog-friendly?

Yes, this trail system is very dog-friendly and is often described as a 'mecca for dogs.' You'll likely encounter many friendly regulars and their pets. Remember to keep your dog leashed and clean up after them.

What kind of scenery can I expect along the way?

Hikers can enjoy expansive views of lush valleys, rolling hills, and, in spring, vibrant wildflowers. You'll also get picturesque views of Boise and the distant Owyhee Mountains, offering a sense of peaceful seclusion close to the city.

What is the terrain like on this route?

The Harrison Hollow Trail features a gentle sand and gravel surface. In contrast, the Who Now Loop Trail is a modern, hillside singletrack with mixed terrain that can include dirt, rocks, and potentially packed snow or mud depending on the season and recent weather.

Does this trail connect with other paths in the area?

Yes, this route is part of an extensive network of interconnected trails. It utilizes sections of the #57 Harrison Hollow (AWT) and the Who Now Loop #51. You can also connect to other trails like #58 Harrison Ridge and #57A Harrison Hollow Loop for varied loop options.

Are there any notable features or landmarks along the trail?

The route itself passes through the scenic Harrison Hollow, a unique narrow valley. The trail system is known for its well-maintained paths and clear signage, making navigation straightforward. The expansive views of Boise and the Owyhee Mountains are also a highlight.

What should I bring for a hike on this trail?

Given the varied terrain and potential for sun exposure, it's advisable to bring water, appropriate footwear (hiking shoes are recommended, especially for the Who Now Loop), sun protection, and layers of clothing. Don't forget waste bags if you're bringing a dog.

How long does it typically take to complete this hike?

The full route, combining Harrison Hollow Trail to Who Now Loop Trail, is approximately 3.7 km (2.3 miles) and typically takes around 1 hour and 5 minutes to complete at a moderate hiking pace. This duration can vary based on your speed and how often you stop to enjoy the views.

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