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Hiking trails & Routes
United States
Maine
Cumberland County
Westbrook

Mill Brook Preserve Trail

Moderate

4.6

(8580)

12,429

hikers

Mill Brook Preserve Trail

02:25

9.04km

100m

Hiking

The Mill Brook Preserve Trail offers a captivating journey through a hilly forest valley, where narrow paths wind past majestic old-growth oaks and maples. You'll follow the Mill Brook, a wide, shallow river, enjoying the sounds of running water and the secluded feel of the woods. Expect varied terrain, from easier sections in the north and south to more challenging, steep climbs and scrambles in the preserve's central part. This moderate 5.6-mile (9.0 km) hike, with 340 feet (104 metres) of elevation gain, typically takes around 2 hours and 24 minutes to complete.

Planning your visit is straightforward, with the 130-acre preserve accessible from four different trailheads. If you're bringing a furry friend, remember that dogs are welcome but must be kept on a leash. For a truly unique experience, aim to visit between late May and early June to witness the annual alewife fish migration, a spectacular natural event that draws many visitors.

This trail is particularly notable for its significant ecological role, highlighted by the alewife migration, which represents a successful restoration effort after centuries of disruption. Beyond the fish, the preserve boasts diverse ecosystems, including floodplain wetlands, forested uplands, beaver ponds, maple forests, open meadows, and marshes. It's an excellent choice for those seeking a rich natural experience that feels remote, yet is conveniently located just minutes from Portland.

Last updated: June 9, 2026

Waypoints

A

Start point

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5.13 km

Mill Brook Preserve

Nature Reserve

B

9.04 km

End point

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Way Types & Surfaces

Way Types

9.04 km

Surfaces

9.01 km

< 100 m

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Elevation

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Weather

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Today

Tuesday 7 July

22°C

14°C

43 %

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Max wind speed: 11.0 km/h

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Frequently Asked Questions

Where can I park to access the Mill Brook Preserve Trail?

The trail is located in Westbrook, Maine, close to Portland. While specific parking details aren't provided, preserves of this nature typically have designated parking areas at trailheads. It's advisable to check the Presumpscot Regional Land Trust's website for the most current parking information.

What is the terrain like on the Mill Brook Preserve Trail?

The trails primarily consist of dirt and forest floor, winding through a peaceful, secluded forested valley. You can expect a hilly landscape with narrow paths, and some sections feature rugged climbs and steep ascents above Mill Brook.

Is the Mill Brook Preserve Trail suitable for beginners or families?

The overall difficulty is rated as moderate. However, the 32-acre Mill Brook Preserve South offers an easier "lollipop" loop trail, making it suitable for all ages and beginners. The central section of the main preserve includes more challenging terrain with rugged climbs and steep hills, but you can plan your route to avoid these more difficult areas if preferred.

Are dogs allowed on the Mill Brook Preserve Trail?

Yes, dogs are welcome on the trails, but they must be kept on a leash at all times.

What is the best time of year to hike the Mill Brook Preserve Trail?

The preserve offers varied experiences throughout the year. Late May and early June are particularly special for observing the annual alewife fish migration. The mature forest provides beautiful scenery in all seasons, including fall foliage and winter snowshoeing opportunities.

Are there any permits or entrance fees required for the Mill Brook Preserve?

No, there are no permits or entrance fees required to access the Mill Brook Preserve trails. It is managed by the Presumpscot Regional Land Trust for public enjoyment.

What unique natural events or wildlife can I observe along the trail?

One of the most significant events is the annual migration of alewife fish from Casco Bay to Highland Lake, typically in late May and early June. The preserve is also rich in wildlife, including various insects, small mammals, birds like cardinals, phoebes, and blue jays, and wildflowers.

Does the trail intersect other well-known paths?

Yes, the route also passes through sections of the Mill Brook Preserve Trail and the 7 Bridges Trail.

What kind of views or scenery can I expect on the trail?

You'll hike through a mature forest with majestic old-growth oaks and maples, as well as floodplain wetlands. Along the trails, you'll find views of Mill Brook, and in some areas, cascading streams that create a "sonic wonder world".

Can I mountain bike or snowshoe on the Mill Brook Preserve trails?

Yes, the preserve offers a total of six miles of trails that are suitable for hiking, mountain biking, and snowshoeing, providing year-round recreational opportunities.

How can I navigate the different sections of the preserve?

Maps are posted at critical intersections throughout the preserve, helping hikers navigate the varied trail system and choose routes suitable for their ability and desired length.

Are there cafes or accommodation available near the preserve?

The preserve feels remote but is conveniently located near Westbrook and Portland, Maine. This proximity means you can find various cafes, restaurants, and accommodation options within a short drive of the trailheads.

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