🏕️ New Hampshire’s Monadnock Region Basecamp — 250+ Campsites, Otter Lake Swimming, Loon Watching, and New England’s Best Fall Foliage — Greenfield State Park near Greenfield, New Hampshire with 400 acres, 250+ campsites, Otter Lake swimming beach (camper and day-use), canoeing/kayaking/paddleboarding (rentals available), fishing (bass, perch, pickerel, bluegill), hiking trails, bog ecosystem, loon watching, fall foliage, near Mount Monadnock — Hillsborough County, NH
Greenfield State Park sits in the heart of New Hampshire’s Monadnock Region — wrapped around Otter Lake with one of the largest campgrounds in the state park system. Over 250 campsites spread through a mixed hardwood forest, steps from a clear swimming lake with loons calling at dawn.
This is classic New England camping. Paddle a canoe across Otter Lake, fish for bass and pickerel, explore the bog ecosystem, and — if you time it right — witness some of the most spectacular fall foliage in North America.
What to Do
| Activity | Details |
|---|---|
| Swimming | Sandy beach on Otter Lake — separate camper and day-use beaches. Clear, clean water |
| Paddling | Canoe, kayak, and paddleboard rentals on-site. Non-motorized boating on Otter Lake |
| Fishing | Smallmouth/largemouth bass, yellow perch, chain pickerel, bluegill. Shore and boat fishing |
| Hiking | Multiple trails through forest and to scenic ponds. Hogback Trail loop popular |
| Bog Walk | Unique bog ecosystem — sphagnum moss, pitcher plants, cranberries. Interpretive walk |
| Loon Watching | Common loons nest on Otter Lake — listen for their iconic calls at dawn and dusk |
| Fall Foliage | Peak color late September–early October. Monadnock Region is a premier leaf-peeping destination |
Camping
| Detail | Info |
|---|---|
| Sites | 250+ campsites — one of NH’s largest state park campgrounds |
| Amenities | Showers, restrooms, dump station, playground, park store |
| Reservations | Recommended — popular destination. Book via ReserveAmerica |
| Season | Typically mid-May through mid-October |
Best Time to Visit
| Season | Best For |
|---|---|
| Fall (late Sep–early Oct) | 🍂 Peak foliage — hardwoods blazing red, orange, gold around Otter Lake |
| Summer (Jun–Aug) | Swimming, paddling, full campground operations. Loons on the lake |
| Spring (May) | Campground opens. Bog plants emerging. Quieter, cooler |
Frequently Asked Questions
How big is the campground?
250+ sites — one of the largest in New Hampshire’s state park system. Spread through hardwood forest with access to Otter Lake. Reserve early for peak season and fall foliage weekends.
Can I rent a kayak?
Yes — canoe, kayak, and paddleboard rentals available on-site. Otter Lake is non-motorized only — quiet, clean paddling.
Is Mount Monadnock nearby?
Yes — one of the most-climbed mountains in North America is a short drive from the park. Often combined with a Greenfield camping trip.
Nearby state parks: If you have extra time, Pack Monadnock Mountain is a short drive away, and Miller State Park is a short drive away.
🏕️ New Hampshire’s Lakeside Basecamp
250+ campsites, Otter Lake swimming, loon calls at dawn, and some of the best fall foliage in New England — in the heart of the Monadnock Region.
Wildlife & Nature
Greenfield State Park — 400 acres surrounding Otter Lake in Greenfield — provides camping (252 sites — one of NH’s largest campgrounds) and swimming in a forest setting. The park’s bog trail traverses a rare sphagnum bog with carnivorous sundew plants and pitcher plants. Common loons nest on the lake. Beaver maintain a lodge visible from the bog trail. Moose are occasionally spotted. Painted turtles sun on logs.
Nearby Attractions
Peterborough — 10 miles south — inspired Thornton Wilder’s “Our Town” and has the Peterborough Players (oldest summer theater in the US). Crotched Mountain — 5 miles west — has skiing. Temple Mountain — nearby — has hiking. Mount Monadnock — 20 miles southwest — is the most-climbed mountain in North America.
Park Location
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