2
hikers
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
Start point
Parking
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2.93 km
Highlight • Gorge
Tip by
3.70 km
End point
Parking
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
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Weather
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Today
Thursday 23 July
39°C
19°C
12 %
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Max wind speed: 15.0 km/h
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This route was planned by komoot.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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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