4.0
(1)
3
hikers
03:47
11.7km
480m
Hiking
Embark on the Mount Prospect, Money Brook, and Hopper Trail Loop, a moderate hike spanning 7.3 miles (11.7 km) with a significant elevation gain of 1570 feet (478 metres). You can expect to complete this journey in about 3 hours and 47 minutes. The trail offers diverse scenery as you…
Last updated: April 23, 2026
Waypoints
Start point
Parking
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2 m
Highlight • Parking
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3.81 km
Highlight • Viewpoint
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4.24 km
Highlight • Summit
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5.63 km
Highlight • Viewpoint
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7.16 km
Highlight • Waterfall
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11.7 km
End point
Parking
Way Types & Surfaces
Way Types
11.2 km
339 m
141 m
Surfaces
8.15 km
3.36 km
174 m
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Elevation
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Wednesday 8 July
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Max wind speed: 9.0 km/h
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This route was planned by komoot.
You can park at the Haley Farm Trailhead Parking. It's located at the end of Hopper Road in Williamstown, within the Mount Greylock State Reservation.
This loop is considered difficult and strenuous, often described as a "butt kicker" due to significant elevation gain and steep sections. You'll encounter varied terrain, including muddy conditions along Hopper Brook, several challenging brook crossings, steep rock faces, and continuous ascents, particularly on the Mount Prospect section. There are also narrow singletrack paths and stone stairs.
The Mount Prospect, Money Brook, and Hopper Trail Loop is approximately 11.7 km (7.3 miles) long and typically takes around 3 hours and 47 minutes to complete. This duration can vary based on your pace and how long you spend enjoying the viewpoints.
The trail offers diverse scenery. You'll get commanding views of the west side of Mount Greylock, Stony Ledge, and Mount Prospect from the trailhead. Highlights include the scenic Money Brook Falls, the Mount Prospect Summit, and a Lookout - View to Williamstown, offering excellent vistas of Williamstown, the Green, and Hoosac Valleys.
Yes, dogs are generally allowed on trails within the Mount Greylock State Reservation. However, they must be kept on a leash at all times to protect wildlife and ensure the safety of other hikers.
While beautiful year-round, the best time to hike is typically from late spring through fall. Be aware that brook crossings can be particularly challenging during winter or after heavy rains due to potential ice or high water levels. Fall foliage offers spectacular views, but prepare for cooler temperatures.
As of current information, there are no specific permits required for hiking this loop within the Mount Greylock State Reservation. There may be a parking fee at certain times of the year or for specific lots within the reservation, so it's always good to check the official state park website before your visit.
Yes, the route connects with sections of the renowned Appalachian Trail. It also utilizes parts of the Mount Prospect Trail, Money Brook Trail, and Hopper Trail, among others.
Be prepared for a strenuous workout, especially on the continuous, steep ascent to Mount Prospect. The Money Brook Trail involves several brook crossings that can be tricky, particularly after rain or in winter. Sturdy hiking boots with good ankle support are highly recommended, and trekking poles can be very helpful for stability on steep and rocky sections.
Due to its difficult and strenuous nature, significant elevation gain, and challenging terrain, this loop is generally not recommended for beginners or young children. It's best suited for experienced hikers seeking a vigorous workout.
There are no specific facilities like restrooms or potable water sources directly on the trail itself. The Money Brook Falls provides a natural water source, but it's always advisable to filter or treat any natural water before drinking. Plan to carry all the water and snacks you'll need for the duration of your hike.
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