About this location
Northfield Mountain straddles the towns of Northfield and Erving in Franklin County, Massachusetts, along the Connecticut River. Today it's best known as the site of a pumped-storage hydroelectric facility and a large public recreation area — hiking (including a stretch of the 114-mile Metacomet-Monadnock Trail), cross-country skiing, and rock climbing at Rose Ledges and Farley Ledges — all managed by FirstLight Power Resources under a public-recreation license tied to their state agreement. The bedrock is late-Precambrian to early-Paleozoic metamorphic rock, over 400 million years old. Mindat records a "Garnet Rock" feature within the Town of Northfield, which lines up with this database entry's garnet tag, though the DB coordinate itself lands just across the town line in Erving.
Always seek permission where required, follow local laws, and practice Leave No Trace. Locations and details are community-submitted and may be inaccurate. Not sure what's legal here? Read our full guide to rockhounding laws by land type.
Found Here
Garnet, reportedly of gem-cuttable quality per general rockhounding roundups — not independently verified against a mineralogical source beyond the "Garnet Rock" feature name recorded on mindat.
Difficulty
Getting there
Northfield Mountain Recreation and Environmental Center, off Route 63, on the Northfield/Erving town line, Franklin County, Massachusetts.
Collecting here
Not established. The recreation area is set up for hiking, skiing, and climbing — no source confirms a collecting program or policy for removing rock material.
Know before you go
The land is privately held by FirstLight Power Resources and operated under a public-recreation license, not a state park or forest. Whether that license permits removing rock or mineral material is unconfirmed — call the Northfield Mountain Recreation and Environmental Center before planning to collect anything here.
Location on Map
Coordinates: 42.62611, -72.43721
Nearby rockhounding locations
- Warwick — HematiteMA · 3.8 mi
- Horse Race, Turner's Falls, Montague — FossilMA · 4 mi
- opposite Millers River — FossilMA · 4.6 mi
- Northfield — Fluorite, GarnetMA · 5.1 mi
- Horse Race Quarry, Gill — FossilMA · 4.2 mi
- South Bank of Connecticut river (Marsh-Stoughton collection) — FossilMA · 4.3 mi
Frequently asked questions
Can you collect garnet at Northfield Mountain, Massachusetts?
Not confirmed. The area is a privately-operated public recreation site (FirstLight Power Resources), and no source confirms whether removing rock material is permitted under its recreation license.
Who owns Northfield Mountain, Massachusetts?
FirstLight Power Resources owns and manages the mountain's recreation area, which includes hiking trails, a ski area, and rock climbing at Rose Ledges and Farley Ledges, under a public-recreation license tied to their hydroelectric operations.
Is Northfield Mountain in Northfield or Erving, Massachusetts?
Both — the mountain straddles the town line between Northfield and Erving in Franklin County, Massachusetts.
What is Northfield Mountain best known for besides rockhounding?
It's the site of a pumped-storage hydroelectric facility and a large recreation area with hiking trails (including part of the Metacomet-Monadnock Trail), cross-country skiing, and rock climbing.
⚠️ Always verify current regulations, weather conditions, and access requirements before visiting any location. Information provided is based on community submissions and may not be current or accurate.
Sources
- https://en.wikipedia.org/wiki/Northfield_Mountain — geology, trail system, FirstLight Power management, historic sites
- https://www.mindat.org/feature-4937594.html — "Garnet Rock, Town of Northfield, Franklin County, Massachusetts" (title/feature surfaced via search; mindat not directly fetched per spec)
- Search synthesis on garnet reportedly gem-cuttable quality in the Northfield Mountain area
Recommended Gear for Massachusetts
Estwing E3-22P Rock Pick
The industry-standard 22oz geological hammer. One-piece forged steel with shock-reduction grip.
Clear Anti-Fog Safety Glasses (4 Pack)
Adjustable, anti-fog lenses for clear vision in any conditions. About $5 per pair.
Watertight Medical Kit
Compact, waterproof first aid kit with bandages, moleskin, and field essentials.
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