Grindstone Falls
By Armen Suny · Last verified Sep 2026
LiDAR & 3D terrainAbout Grindstone Falls
Grindstone Falls is a quietly scenic waterfall in Maine tucked into the Penobscot River Corridor. Nestled on private land and managed as part of that corridor by SPR, it’s a lesser-known spot that rewards visitors with wooded approaches, mossy rock ledges, and a peaceful plunge pool—perfect for a reflective picnic or a photo stop away from busier trailheads. Because the falls sit on private property within the Penobscot River Corridor (designation: UNKE), visitors should respect access rules and stay on established paths. The short but rewarding approach makes Grindstone Falls a great choice for hikers seeking a moderate outing with classic Maine river scenery rather than a long day on the trail.
The Setting
Grindstone Falls sits at 364 feet within Penobscot River Corridor, fed by the East Branch Penobscot River, in the coastal lowlands of Maine.
Trail & Hike Details
Trail Description
The approach to Grindstone Falls is a 2.4-mile out-and-back hike with roughly 350 feet of elevation gain and is generally rated moderate. The route follows wooded terrain and natural tread to the waterfall; specific USFS trail surface, grade, and class data are not available for this route, and no USFS trail number is provided in the available records. Note that the fall and access route lie on private land within the Penobscot River Corridor managed by SPR—observe any posted access restrictions and stay on the established trail.
What to Expect
Visitors can expect a tranquil waterfall surrounded by forested scenery. The area is likely to be quiet and less crowded compared to more popular waterfalls in Maine.
Accessibility
Accessibility information is not available. The trail may not be suitable for those with mobility challenges.
Frequently Asked Questions
🐶 Are Dogs Allowed at Grindstone Falls?
❌ Dogs are not allowed
Are There Any Fees or Permits Required?
🆖 No fees required
🏊 Is There Swimming at Grindstone Falls?
❌ Swimming is not allowed
When to Visit
Spring and early summer are ideal for visiting, as water flow is typically strongest during these seasons.
Seasonal Access
The best time to visit is Spring, Summer, and Fall. Winter access may be limited.
Safety Information
Trail conditions may be uneven or slippery, especially after rain. Visitors should exercise caution near the waterfall and avoid getting too close to the edge.
Current Water Conditions
358 ft³/s
Current discharge — how much water is flowing
Lower than usual for this time of year
Based on 104 years of record
4.51 ft
Water depth at gauge
7-Day Discharge Trend
What does this mean for your visit?
Flow is lower than usual for this time of year.
About This Gauge
7-Day Flow Outlook
Based on the USGS gauge East Branch Penobscot River at Grindstone, Maine (0 km away).
Today
Barely Flowing
358 cfs
5/10Tomorrow
Barely Flowing
376 cfs
4/10Sun
Barely Flowing
393 cfs
4/10Mon
Barely Flowing
398 cfs
3/10Tue
Low
476 cfs
3/10Wed
Barely Flowing
427 cfs
5/10Thu
Barely Flowing
371 cfs
5/10Best window: Today — barely flowing flow, sunny (trip score 5/10).
Best time of year: this gauge typically runs highest from late March to late June, peaking in April.
How we calculate this
This is a transparent outlook, not a precise forecast. We take the waterfall's current flow strength (how it ranks against its historical normal for today, from the nearest USGS stream gauge), carry that ranking forward along the gauge's seasonal curve, and nudge it for forecast rain. Confidence is highest for the next day or two and falls further out. Always check official conditions and your own judgment before visiting — high flows can be dangerous.
Know when to go.
Get a free email alert when waterfalls near Patten hit peak flow. We only send when conditions are worth the trip — no weekly newsletters, no spam.
Weather Forecast
The Terrain, Seen by LiDAR
Aircraft-mounted lasers measured this ground to within inches. Trees and buildings are digitally stripped away, leaving the bare shape of the land the water has carved.
1-meter lidar measures about 69 feet of descent through Grindstone Falls, a steep tiered drop rather than a single free fall. The brink sits at about 369 feet above sea level.
The ground changes about 23 feet in the 500 feet above the falls and 53 feet in the 500 feet below. Facing east, the falls catch soft morning light.
Drag to compare. The dot marks the waterfall. The frame is about a mile across.
- Ground elevation
- 369 feet
- Measured by 1-meter lidar
- Drop at the falls
- About 69 feet
- Change in ground height within ~250 feet of the falls
- Faces
- East
- Catches soft morning light.
A slice through the lidar ground surface, from above the falls to downstream (heading east).
Elevation data: USGS 3D Elevation Program. Aerial imagery: USGS The National Map. Public domain.
Location & Access
Getting There
Grindstone Falls is located near the town of Medway, Maine. Access may require navigating rural roads, so a reliable map or GPS is recommended.
Get Directions on Google MapsParking
Parking availability is unclear, but visitors may need to park along the roadside or at a nearby trailhead.
Elevation
364 feet above sea level
Coordinates
45.728384° N, -68.591699° W
Land Management
Managed by SPR
Visitor Tips & Gear
Bring sturdy footwear as trail conditions may vary. Be prepared for limited facilities and pack out all trash to preserve the natural environment.
Where to Stay
Baxter Park Inn
The Whitetail Inn and Suites- Lincoln
Hotel Terrace
Katahdin Valley Motel
Browse vacation cabins and private rentals nearby
Unique outdoor stays — tents, yurts, and treehouses
Rent a campervan or RV for your waterfall road trip
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Additional Information
Nearby Attractions
The nearby town of Medway offers small-town charm and access to the Penobscot River for additional outdoor activities.
Wildlife
The area may feature local wildlife such as birds, deer, and small mammals. Be mindful of ticks and other insects.
Nearby Waterfalls
Other waterfalls named Grindstone Falls
1 other waterfall shares this name across the U.S.
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