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MM and Keystone Trail Loop

5 ★★★★★ 2 Google reviews · Running trail in Holyoke, Massachusetts · Open 24 hours

Runner's snapshot

Surface
Not reported
Loop distance
Not reported
Shape
Loop
Shade
Not reported
Access
Open 24 hours

Confirmed from MM and Keystone Trail Loop's own listing, the park or land manager's website, and runner reviews. Blank cells mean we could not verify that fact — we would rather say "not reported" than invent one. There is no Easy / Moderate / Hard rating on this page on purpose: a one-word difficulty score tells you nothing about whether a trail suits your run. Surface, distance, shade and hours do.

MM and Keystone Trail Loop — running trail in Holyoke, MA, photo 1
MM and Keystone Trail Loop — running trail in Holyoke, MA, photo 2
MM and Keystone Trail Loop — running trail in Holyoke, MA, photo 3
MM and Keystone Trail Loop — running trail in Holyoke, MA, photo 4
MM and Keystone Trail Loop — running trail in Holyoke, MA, photo 5
LoopOpen 24h

What runners say about MM and Keystone Trail Loop

Pulled from public reviews of this trail (2 of them) — the things people bring up again and again, in their own words. Nothing here is written by us.

Beautiful hike and amazing views. Several rocky areas and some steep and narrow passageways. Had a blast and will do it again ❤️

★★★★★ — Emily , Sep 2024

Excerpts from public Google reviews. Read all 2 reviews →

Trail conditions & character

What this trail is actually like underfoot and overhead, taken from its own listing and from reviews. Each one links to every other trail with the same character. Busy or quiet is reported as a plain fact, not a plus or a minus — a runner heading out alone at dawn often wants company on the path, and someone running intervals wants an empty one.

🔁 Loop trail

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Plan your run at MM and Keystone Trail Loop

The practical stuff

  • AccessOpen 24 hours — no gate to beat, so a 5am or a 10pm run both work
  • DistanceNot reported. Trail systems often quote total path mileage rather than a single loop, so measure the route you actually want before you drive out.
  • ShadeNot reported. Assume some of it is exposed and carry water in summer.

Hours

Monday Open 24 hours
Tuesday Open 24 hours
Wednesday Open 24 hours
Thursday Open 24 hours
Friday Open 24 hours
Saturday Open 24 hours
Sunday Open 24 hours

Posted hours for the park or trailhead. Gates and parking lots often close earlier than the trail itself, and seasonal hours change — worth a check before a pre-dawn or after-dark run.

Where to find MM and Keystone Trail Loop

Holyoke, Massachusetts

Get directions

Running trails near Holyoke

Other trails within easy driving distance — useful when this one is flooded, gated, or just not the run you had in mind today.

Mount Tom State Reservation

4.8 ★★★★★ 1,458 reviews

Holyoke, MA

Scenic

State park with scenic views boasts premier spot for hawk-watching, plus skiing, fishing & skating.

under a mile away

Bachelor Brook - Stony Brook Trailhead

4.7 ★★★★★ 10 reviews

South Hadley, MA

1.1 miles away

Mount Tom North Trailhead Park

4.6 ★★★★★ 45 reviews

Easthampton, MA

LoopMixedScenicDog-friendly

1.1 miles away

Old Pascommuck Conservation Area

4.1 ★★★★☆ 15 reviews

Easthampton, MA

1.1 miles away

Mutter’s Field Accessible Trail

4.6 ★★★★★ 45 reviews

Easthampton, MA

LoopScenic

1.8 miles away

Brickyard Brook Conservation Area

4.1 ★★★★☆ 27 reviews

Easthampton, MA

Dog-friendly

2.0 miles away

All running trails in Holyoke, MA →

Nearby towns

Listing verified July 2026 from public records, the trail's own website and runner reviews. Trail conditions change — paths flood, gates close at dusk, and shaded woods stay muddy for days after rain. Something out of date? Report a correction. Manage this trail? Send us the details — it is free.