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Hiking trails & Routes
United States
Massachusetts
Middlesex County
Medford

Boojum Rock and Hemlock Pool Loop

Moderate

4.6

(4219)

6,179

hikers

Boojum Rock and Hemlock Pool Loop

01:32

5.46km

60m

Hiking

Hike the moderate Boojum Rock and Hemlock Pool Loop in Middlesex Fells Reservation, offering rocky terrain, forest views, and the Boston sky

Last updated: February 26, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Waypoints

A

Start point

Parking

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B

5.46 km

End point

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Way Types & Surfaces

Way Types

3.37 km

1.22 km

852 m

< 100 m

< 100 m

Surfaces

4.68 km

732 m

< 100 m

< 100 m

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Elevation

Elevation

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Weather

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Today

Saturday 6 June

31°C

17°C

21 %

Additional weather tips

Max wind speed: 20.0 km/h

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Frequently Asked Questions

How long does it typically take to complete the Boojum Rock and Hemlock Pool Loop?

Hikers generally complete this loop in about 1 hour and 30 minutes to 2 hours, depending on pace and how much time is spent enjoying the viewpoints. The official komoot estimate is 1 hour 32 minutes for the 5.46 km distance.

What is the terrain like on this trail?

The trail lives up to its 'Rock Circuit' name, featuring a challenging and dynamic experience. You'll encounter numerous rocky outcrops, steep ascents, and descents, often requiring rock scrambling. While some very steep sections have bypass options, expect consistent up-and-down terrain through mostly forested areas, with some exposed sections. Sturdy footwear is highly recommended.

Is the Boojum Rock and Hemlock Pool Loop suitable for beginners or families with young children?

This trail is generally rated as moderate to difficult and is not an 'easy walk in the park'. Due to the rocky terrain, steep sections, and required rock scrambling, it might be challenging for beginners or families with very young children. Those seeking a less strenuous hike might prefer other options within the Middlesex Fells Reservation.

What are the main points of interest along the route?

Key highlights include Boojum Rock, which offers panoramic views of the Boston skyline and is the highest point in Malden. You'll also pass by Hemlock Pool, a peaceful spot known for bouldering opportunities. Near Boojum Rock, you can discover the foundations of an old MIT Observatory built in 1899, with an informative sign detailing its history. The trail also offers glimpses of the Fells Reservoir and Winchester reservoirs.

Where can I park for the Boojum Rock and Hemlock Pool Loop?

Specific parking information for this exact loop isn't detailed, but as part of the Middlesex Fells Reservation, parking is typically available at various trailheads around the reservation. It's advisable to check the Middlesex Fells Reservation website or a detailed map for designated parking areas closest to your intended starting point.

Are there any permits or entrance fees for the Middlesex Fells Reservation?

Generally, there are no specific permits or entrance fees required to hike within the Middlesex Fells Reservation. It's a public park, making it accessible for all to enjoy. However, always check the official Massachusetts DCR website for any updated regulations or special event fees.

Is the Boojum Rock and Hemlock Pool Loop dog-friendly?

Yes, dogs are generally allowed on trails within the Middlesex Fells Reservation. However, they must be kept on a leash at all times. Given the challenging and rocky terrain, ensure your dog is capable of handling the hike and that you bring enough water for both of you.

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

The trail can be enjoyed year-round, but spring and fall offer the most pleasant conditions with cooler temperatures and beautiful foliage. Fall provides stunning colors, while spring brings new growth. Summer can be hot and humid, and winter hikes require appropriate gear for potentially icy or snowy conditions on the rocky sections.

Is navigation straightforward on the trail?

Navigation on this loop can be tricky due to many crisscrossing trails within the Middlesex Fells Reservation. While the main path is generally marked with white blazes, carrying a detailed map or using a reliable mobile navigation app like komoot is highly recommended to stay on track and avoid getting lost.

Does the trail connect with other paths?

Yes, the Boojum Rock and Hemlock Pool Loop is part of a larger network. The route primarily follows the Cross Fells Trail and also passes through significant sections of the Rock Circuit Trail, the Rock Circuit Connector, and a small portion of the Fells Path. This interconnectedness allows for longer or alternative hiking options.

What's an insider tip for hiking this loop?

Given the challenging and rocky nature of the trail, especially the rock scrambling sections, it's wise to wear sturdy hiking boots with good ankle support. Also, consider hiking the loop counter-clockwise if you prefer to tackle the steepest ascents earlier in your hike, or clockwise if you prefer a more gradual start before the more intense sections.

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