Greenfield State Park
Greenfield State Park is a quiet lakeside park centered on Otter Lake in the Monadnock Region. Visitors come for swimming, paddling, picnicking, and a relaxed campground setting surrounded by forest and rolling hills.
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Visiting with Dogs
Dogs allowed in designated areas; must be leashed, under control, and owners must clean up after them.
Visitor Tips & Reviews
What Visitors Say
Quiet lakefront camping, swimming, kayaking, and scenic wooded trails make Greenfield State Park a relaxing getaway. Visitors love the peaceful atmosphere, family-friendly beach, and natural beauty.
Tips from Visitors
- Arrive early on summer weekends for easier parking.
- Bring cash or card for day-use fees and rentals.
- Pack bug spray for wooded trails and lakeside areas.
- Check swimming conditions before entering the water.
- Keep pets leashed and clean up after them.
Best Time to Visit
The best time to visit Greenfield State Park is from late June through early September, when Otter Lake is warm enough for swimming and paddling. Weekdays are typically quieter, while summer weekends offer the liveliest beach atmosphere.
Amenities
Nearby Attractions
Explore these attractions near Greenfield State Park:
- Peterborough Town House and Downtown PeterboroughA charming nearby town center with shops, dining, and local culture for visitors combining outdoor recreation with a small-town stop.16 miles away
- Mount Monadnock State ParkOne of New Hampshire’s most famous hiking destinations, known for expansive summit views and a classic mountain climb.22 miles away
- Miller State ParkA scenic mountaintop park with a short drive to summit views and picnic areas.24 miles away
Things to Do at Greenfield State Park
Camping at Greenfield State Park
Greenfield State Park offers tent camping and RV sites with basic amenities; reservations recommended. Seasonal operation; check current availability.
Hiking Trails
Greenfield State Park offers easy, family-friendly day hiking with a relaxed, scenic feel. Trails are generally short and well-marked, winding through mixed woods, around the pond, and past quiet wetlands. Hikers often enjoy the peaceful setting, birdwatching, and gentle terrain more than challenging elevation. It’s a good choice for a casual walk, especially in spring, summer, and fall.
Pond Loop Trail
EasyA scenic loop around Otter Lake with wooded sections, shoreline views, and gentle terrain; a great introductory hike in the park.
Greenfield State Park Trail Network Loop
Easy to ModerateA longer loop combining multiple park paths through forested areas and near the lake, offering a quiet walk with varied scenery.
Shoreline Connector Trail
EasyA relaxed out-and-back or loop option that follows the lake edge and connects to picnic and beach areas, ideal for a shorter outing.
Woodland Ridge Trail
ModerateThe park’s most challenging option, with longer forest stretches, rolling terrain, and a more immersive backcountry feel.
Directions
From Route 101, take the Greenfield exit and follow local roads west to Campground Road. The park entrance is signed and located near Otter Lake in Greenfield.
Contact & Info
Frequently Asked Questions
What are the camping options at Greenfield State Park?
The park is known for its campground with sites for tents and RVs, plus some sites near the lake. Visitors often mention it as a quiet, family-friendly place, but reservations are recommended, especially in summer.
Is Greenfield State Park good for swimming?
Yes. The park has a sandy beach on Otter Lake that is popular for swimming. Reviews often note the water is calm and good for families, though the beach can get busy on warm weekends.
Can I bring a boat or kayak to Greenfield State Park?
Yes, non-motorized boating like kayaks, canoes, and paddleboards is commonly enjoyed on Otter Lake. Visitors often like the peaceful water, but it’s best to check current park rules before launching.
Are pets allowed at Greenfield State Park?
Pets are typically allowed in designated areas and on leashes, but not usually on the beach or in swimming areas. Many visitors say the park is pet-friendly overall, as long as you follow posted rules.
What activities are available besides swimming and camping?
Visitors often enjoy hiking, fishing, picnicking, and paddling. The park is praised for being relaxed and scenic, with easy ways to spend a day outdoors without needing a lot of planning.
Is Greenfield State Park family-friendly?
Yes. Many reviews describe it as a peaceful, family-friendly park with a beach, campground, and simple outdoor activities. It’s a good choice for a low-key day trip or weekend stay.

Don’t Forget the Essentials
Essential camping & hiking gear we recommend to make your park trip easier and more comfortable.
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