Pachaug State Forest Guide
Pachaug State Forest covers 27,000 acres across the towns of Voluntown, Sterling, Griswold, and Preston in eastern Connecticut, making it the largest state forest in the state. CT DEEP has managed the land since 1928, assembling the parcel over decades from former agricultural and timber land. The result is a forest that reads like the eastern Connecticut landscape at its most intact: mixed hardwood and pitch pine uplands, Atlantic white cedar bogs, cold-water streams, and a dozen ponds scattered through the interior. It is not a dramatic mountain landscape. What it offers is size, quietness, and ecological detail that rewards visitors who slow down to look for it.
Eastern Connecticut is the part of the state most people skip on the way to somewhere else. Pachaug is the reason not to. The forest sits close to the Rhode Island border, roughly equidistant from Providence and Norwich, and it draws a fraction of the visitors that better-known parks in the western Litchfield Hills receive. On a September weekday you can walk 5 miles of blue-blazed trail without seeing another person. That level of solitude in southern New England takes effort to find, and Pachaug delivers it.
What to Expect
The terrain through Pachaug is gently rolling hill country, rarely climbing more than 200 to 300 feet above the surrounding lowlands. The dominant forest type is mixed oak and pitch pine on the dry sandy uplands, transitioning to red maple swamps and Atlantic white cedar bogs in the wetter drainages. The Atlantic white cedar is worth pausing to appreciate: it is rare in inland New England, favored in coastal areas, and the stands here represent one of the few significant inland occurrences in Connecticut. The trees are tall and slender with shaggy reddish bark, and the bogs they grow in have a distinct smell and mood that sets them apart from the surrounding hardwood forest.
The Blue Blazed Hiking Trail System is the organizing framework for hiking at Pachaug. The Connecticut Forest and Park Association (CFPA) maintains a network of long-distance trails across the state, all marked with blue rectangular blazes on trees and posts. Pachaug is home to two of them: the Nehantic Trail running through the western portion of the forest, and the Pachaug Trail cutting through the core. Together they cover more than 24 linear miles of trail through the forest, both accessible from multiple trailheads and passable as day sections rather than requiring a full through-hike. The CFPA publishes detailed trail maps through ctwalks.com; downloading or printing one before your visit is strongly recommended since cell service is limited in the forest interior.
The Rhododendron Sanctuary is the feature that draws repeat visitors. A protected grove of great rhododendron (Rhododendron maximum) covers several acres of the forest, and in late June it blooms in dense clusters of pink and white flowers. The effect is unusual for New England: the shrubs grow 10 to 15 feet tall, creating a canopy within the forest canopy, and the bloom transforms a quiet walk through mixed woods into something that feels tropical in scale. The exact peak varies each year by a week or two; late June is generally reliable but calling the Voluntown ranger office or checking CT DEEP communications before making a dedicated trip for the bloom is worth the effort.
Green Falls Pond in the southern portion of the forest offers swimming from a small beach (supervised in season), a campground on the shore, and good fishing for bass and pickerel. The Green Falls Pond Loop trail makes a reasonable half-day walk for campers who want low-key terrain, circling the pond through hardwood forest with the water visible through the trees for most of the route.
Best Trails
Pachaug Trail
24.0 mi one-way, Moderate
The Pachaug Trail is the main spine of hiking through the forest, a blue-blazed route that covers the core of the 27,000-acre property from the Beachdale Road area in the north to the Hopeville Pond vicinity in the southwest. Most visitors approach it as a series of day sections rather than a through-hike. The trail passes through the Rhododendron Sanctuary (the most popular access point for the sanctuary), several Atlantic white cedar bogs, and the Green Falls Pond area. Carry the CFPA trail map; junctions are signed but the trail weaves through forest roads in places that can be confusing without a reference.
Backpacking the full Pachaug Trail is possible but requires advance planning: there are no established overnight shelters on the trail itself, and camping is restricted to designated campgrounds. Day sections of 8 to 12 miles are the practical format for most visitors. The terrain is consistent: rolling hills, wet crossings, and stretches through dense forest that make the miles feel longer than they are on flat terrain.
Nehantic Trail
15.0 mi one-way, Moderate
The Nehantic Trail covers the western portion of the forest on a separate blue-blazed route, accessible from several trailheads along Routes 138 and 165. The trail connects into a longer network extending west toward Voluntown and east toward the Pachaug Trail system; for hikers who want a longer route, portions of both trails can be combined via connector paths. Like the Pachaug Trail, the Nehantic works best as a series of day sections rather than a single long push.
Rhododendron Sanctuary Loop
2.0 mi, Loop, Easy
The most distinctive short walk in the forest. The loop passes through the heart of the protected rhododendron grove, where the shrubs grow dense enough to form an arching canopy overhead. Outside the bloom period (mid-to-late June), the sanctuary is still worth visiting for the structure of the grove itself, though it lacks the visual drama of the flowering period. The trailhead is accessible from Hell Hollow Road. The loop is short enough to combine with a longer section of the Pachaug Trail for a half-day outing.
Green Falls Pond Loop
3.0 mi, Loop, Easy-Moderate
A practical loop for campers or day visitors using the Green Falls area. The trail circles the pond through a mix of hardwood and pine forest, passing close enough to the water for frequent views. The terrain is gently rolling with no significant climbs. This is a reasonable morning walk before or after a day at the swimming area, and a good introduction to the forest's character without committing to a longer blue-blazed route.
When to Visit
Spring (April through May) brings wildflowers and high water in the ponds and streams. The forest is at its greenest in May, and fiddlehead ferns line the wet drainages. Mosquitoes arrive by mid-May and become a serious factor through June; bring insect repellent for any extended walk in the wetland areas.
Late June is the peak visit window for the Rhododendron Sanctuary. The bloom typically lasts one to two weeks, and the timing is not perfectly predictable year to year. If the bloom is the primary reason for your trip, confirm current conditions before making the drive.
Summer (July and August) is camping and swimming season at Green Falls Pond. The campground books out on summer weekends as of 2026; reservations through the CT state parks system at reserveamerica.com are essential for peak dates. Weekday visits are considerably quieter. The forest interior stays cooler than the surrounding towns due to canopy cover, making it a reasonable refuge on hot days.
Fall (September through October) is the most reliably pleasant time to hike. Insects drop off significantly after Labor Day, temperatures cool, and the mixed hardwood forest turns in a modest but genuine display of color through October. The forest sees far fewer visitors in fall than in summer, and the trails through the interior give a real sense of solitude.
Getting There and Logistics
The main managed area of Pachaug State Forest centers on the Voluntown headquarters near the intersection of Routes 49 and 138 in Voluntown, Connecticut. Green Falls Campground and the primary swim area are accessible via Hell Hollow Road off Route 138. Multiple trailheads for the Nehantic and Pachaug Trails are scattered along secondary roads; the CFPA trail map is the most useful reference for locating specific access points.
From Providence, RI: take I-95 south to Route 138 west (about 30 miles, 45 minutes). From Norwich: take Route 82 east to Route 138 east (about 22 miles, 35 minutes). From Hartford: Route 44 east to Route 6 east to Route 49 south covers the distance in approximately 75 minutes.
Parking at trailheads along forest roads is generally free. The Green Falls Campground and swim area charge a parking fee as of 2026; check portal.ct.gov/DEEP for current rates. The CT state parks reservation system at reserveamerica.com handles campsite bookings.
There is no transit service to the forest. A car is required for all access points.
Planning Tips
- Cell service is limited to absent in most of the forest interior. Download the CFPA trail map offline before you leave, or buy the printed version. The blue-blazed trails are well-signed at junctions, but the map matters when trails intersect with unnamed forest roads.
- Insect pressure from May through August is significant in the wet drainages and bog areas. DEET-based repellent is effective; lighter alternatives are less reliable in the areas near Atlantic white cedar bogs.
- The Rhododendron Sanctuary peak is 7 to 10 days long and the timing varies each year. Check CT DEEP communications or call the Voluntown ranger station (860-376-4075) before planning a dedicated bloom visit.
- Green Falls Campground fills on summer weekends well in advance as of 2026. Book early through reserveamerica.com, or plan a weekday visit. Walk-in sites are not guaranteed.
- The America the Beautiful Pass does not apply at Pachaug since it is a state-managed forest. CT state parks have their own fee structure.
- For a contrasting Connecticut state forest experience, Peoples State Forest in Litchfield County offers smaller scale, a river corridor, and CCC architecture that complements what Pachaug offers.
- Read checking conditions before you go for current fire risk, trail closures, and campground status before your visit. The CT DEEP alerts page is the most current source.
- The 10 essentials apply here: the forest is large enough that a navigation error in the interior creates a real problem. Navigation, water, and layers matter even on a warm day.
Pachaug rewards visitors who come prepared and move slowly through it. The rhododendron sanctuary, the cedar bogs, and the long blue-blazed corridors are all more interesting the more attention you bring to them. Practice Leave No Trace principles throughout, particularly in the ecologically sensitive bog areas where vegetation takes years to recover from trampling.