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United States
Oregon
Benton County

Mill Hill Loop Trail

Easy

4.9

(3387)

15,830

hikers

Mill Hill Loop Trail

01:31

5.66km

70m

Hiking

Embark on an easy hike along the Mill Hill Loop Trail, a 3.5-mile (5.7 km) route that offers a pleasant outdoor escape. You will navigate through diverse scenery, from serene forests of Oregon White Oak and Douglas-Fir, often draped in bright green lichen, to open marshy areas. The trail involves…

Last updated: April 23, 2026

Waypoints

A

Start point

Parking

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1

2.01 km

Mill Hill Loop

Highlight (Segment) • Trail

The popcorn flower (Plagiobothrys figuratus) is just one of the many blooms adorning the trail. Amidst flowers, diverse trees, and endangered creatures find refuge, creating a sanctuary of life and beauty.

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5.66 km

End point

Parking

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Way Types & Surfaces

Way Types

5.65 km

< 100 m

Surfaces

2.87 km

2.62 km

174 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

Saturday 17 October

19°C

8°C

41 %

Additional weather tips

Max wind speed: 10.0 km/h

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Frequently Asked Questions

What is the best time of year to hike the Mill Hill Loop Trail?

The trail is accessible year-round. For vibrant wildflowers, spring (April and May) is ideal. October offers beautiful fall foliage. Winter months provide excellent opportunities to see geese, swans, and other birds.

Is the Mill Hill Loop Trail suitable for beginners?

Yes, the trail is generally considered easy. While it does have some 'up-and-down' sections that some might rate as moderate, it's manageable for most hikers. The total elevation gain is around 71 meters over 5.6 kilometers.

Are dogs allowed on the trail?

No, dogs are not permitted on any trails within the William L. Finley National Wildlife Refuge, which includes the Mill Hill Loop Trail. This regulation helps protect the diverse wildlife in the refuge.

Do I need a permit or pay an entrance fee to access the refuge or trail?

Generally, there are no specific permits or entrance fees required for day use of the William L. Finley National Wildlife Refuge trails. However, visitors should always check the official refuge website for any updated regulations or special event requirements before visiting.

What kind of terrain and scenery can I expect on this hike?

You'll experience diverse scenery, including beautiful forests with Oregon White Oak and Douglas-Fir, open marshy areas, and wildflower meadows in spring. The path winds through mixed woodlands, and you might catch glimpses of Gray Creek. On clear days, distant views of mountains like the Three Sisters and Mt. Jefferson are possible.

What wildlife can I expect to see along the route?

The refuge is known for its abundant wildlife. Hikers often spot elk in marshy areas, and during winter, geese, swans, and various other birds are visible. Other potential sightings include wood ducks, beavers, deer, Acorn Woodpeckers, Purple Martins, and even turtles.

Where can I park to access the Mill Hill Loop Trail?

The Mill Hill Loop Trail is located within the William L. Finley National Wildlife Refuge. Parking is available at designated trailheads within the refuge. Specific parking areas are usually well-marked upon entry to the refuge.

What should I know about trail conditions, especially after rain?

While generally easy, sections of the trail can become extremely muddy after heavy rain. If you plan to hike during or after wet weather, consider bringing trekking poles for stability and wearing waterproof footwear.

Does the trail connect with other paths for a longer hike?

Yes, for those looking for a longer hike, the Mill Hill Loop can be combined with the Woodpecker Loop via the Intertie Trail. The route also passes through sections of the Mill Hill Trail and Beaver Pond Trail.

What is the main highlight of the Mill Hill Loop Trail?

The primary highlight of this route is the Mill Hill Loop itself, offering a comprehensive experience of the refuge's diverse ecosystems and wildlife viewing opportunities.

How long does it typically take to complete the hike?

The estimated hiking time for the 5.6-kilometer (3.6-mile) loop is about 1 hour and 33 minutes at an average pace, though this can vary depending on your speed and how often you stop for wildlife viewing.

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