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United States
Maine
Knox County

Clark Island Preserve loop

Easy

3.2

(22)

81

runners

Clark Island Preserve loop

00:32

4.73km

20m

Running

The Clark Island Preserve loop offers an easy jogging experience, covering 2.9 miles (4.7 km) with a gentle elevation gain of just 56 feet (17 metres). You can expect to complete this route in about 32 minutes, making it perfect for a quick, refreshing outing. As you jog, you'll pass…

Last updated: April 23, 2026

Waypoints

A

Start point

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1

18 m

Clark Island Preserve Trailhead

Highlight • Trail

You can park on 3rd Street and walk across the bridge to the preserve. The trails have forested mossy paths, old wharf foundations, and a swimming spot tucked away within an old water-filled quarry-turned-lagoon.

Tip by

2

936 m

The eastern loop of the preserve is forested and has lovely soft moss carpets along the trail. The eastern loop has much more access to the rocks along the shore.

Tip by

3

3.08 km

Quarry lagoon

Highlight • Lake

Bring a swimsuit to enjoy this lagoon just off the main trail! There are rocks that form stairs and jumping platforms into the water. The whole lagoon is sheltered by …

Tip by

B

4.73 km

End point

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Way Types & Surfaces

Way Types

2.92 km

1.82 km

Surfaces

2.92 km

1.82 km

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Elevation

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Weather

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Saturday 17 October

12°C

2°C

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Frequently Asked Questions

Where can I park for the Clark Island Preserve loop?

The preserve is a bridged island, making it easily accessible. Parking is typically available near the entrance to the preserve. It's a short walk from the Craignair Inn.

Is the Clark Island Preserve loop dog-friendly?

Yes, the preserve is generally dog-friendly. However, it's always best to keep your dog on a leash to protect wildlife and ensure a pleasant experience for all visitors.

What is the best time of year to jog the Clark Island Preserve loop?

The loop is enjoyable year-round, but spring and fall offer pleasant temperatures and beautiful scenery. Spring is particularly good for birdwatching, as human-made ponds attract various birdlife.

Are there any entrance fees or special permits required for Clark Island Preserve?

No, there are no entrance fees or special permits required to access the Clark Island Preserve. It is managed by the Maine Coast Heritage Trust and is open to the public.

Is the Clark Island Preserve loop suitable for beginners?

Yes, the loop is considered easy to moderate and is very well-suited for beginners, children, or those seeking a less challenging jogging route due to its mostly flat profile.

What is the terrain like on the Clark Island Preserve loop?

The terrain is diverse, featuring wide, mowed grass and gravel paths for a relatively smooth surface. You'll also encounter sections of dirt road and some rougher footpath loops, particularly around the historic quarry. The route passes through maritime spruce-fir forests, mixed hardwood forests, and mossy areas.

What kind of scenery and points of interest can I expect on the loop?

You'll enjoy picturesque scenery including attractive beaches, a historic rock quarry, and various wildlife habitats. Notable sights include a saltwater quarry, old apple orchards, and a serene sandy beach. The route also passes the Clark Island Preserve Trailhead and the Clark Island Preserve West Loop, and you can see the Quarry lagoon. Remnants of old stone foundations and a granite wharf from its quarrying history are also visible.

How long does it typically take to complete the jogging loop?

The main loop around the quarry is about 1.8 miles. For jogging, it typically takes around 30-35 minutes to complete, depending on your pace.

What wildlife might I see while jogging the loop?

The preserve is home to a variety of wildlife. You might spot various birdlife, especially near the human-made ponds in spring. Ospreys and seals are also commonly seen along the granite ledges.

Is the Clark Island Preserve loop suitable for families with children?

Absolutely! The trail's easy to moderate difficulty and diverse scenery, including beaches and a quarry pool, make it an excellent choice for families with children. Picnic tables are also available in scenic locations.

Can you swim at Clark Island Preserve?

Yes, the quarry pool within the preserve is an enticing spot for swimming, offering a unique and refreshing experience after your jog.

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