LiDAR terrain view · USGS 3DEP
Big Ambejackmockamus Falls
By Armen Suny · Last verified Sep 2026
LiDAR & 3D terrainDifficulty
Easy
Trail Length
0.5 miles
Trail Type
Out And Back
About Big Ambejackmockamus Falls
Big Ambejackmockamus Falls tumbles along the West Branch of the Penobscot River in Maine, offering a rugged blend of cascading rapids and calmer pools that attract paddlers and day hikers alike. The falls sit in a forested river corridor where mossy ledges and tree-framed viewpoints make for dramatic photos and a quietly remote Maine waterscape that doesn’t require an extended approach. The hike to the falls is rewarding rather than flashy: a 2.4-mile out-and-back that climbs roughly 350 feet, winding through mixed woods before opening onto the river. Expect a moderate outing with a few steeper pitches and uneven footing—perfect for a half-day trip combining forest walking with a striking riverside destination. The nearest formal camping is roughly 36.5 km away at Katahdin Woods and Waters National Monument Camping and Huts, so plan logistics accordingly.
The Setting
Big Ambejackmockamus Falls sits at 640 feet along the E. Br. Penobscot River, in the foothills of Maine.
Trail & Hike Details
Trail Description
2.4-mile out-and-back, ~350 feet elevation gain, difficulty: moderate. The route follows a singletrack footpath through mixed forest with occasional root and rock obstacles and short steeper sections; footing can be uneven in places, so sturdy shoes are recommended. The trail opens onto the West Branch Penobscot River corridor and ends at a riverside viewpoint with clear views of the falls and varied river flows—allow extra time for photography or to explore the riverbank.
What to Expect
Dogs are welcome.
Accessibility
The trail is short and relatively flat, but the surface may be uneven. Contact the managing agency for accessibility details.
Frequently Asked Questions
🐶 Are Dogs Allowed at Big Ambejackmockamus Falls?
✅ Dogs are allowed
Are There Any Fees or Permits Required?
🆖 No fees required
🏊 Is There Swimming at Big Ambejackmockamus Falls?
❌ Swimming is not allowed
When to Visit
Spring and early summer are ideal for visiting, as the water flow is typically higher due to snowmelt. Fall offers beautiful foliage, while summer provides warmer weather for outdoor activities.
Seasonal Access
The best time to visit is Spring, Summer, and Fall. Winter access may be limited.
Safety Information
Exercise caution near the water, as the rocks can be slippery and the currents strong. Be aware of logging trucks on the Golden Road and yield the right of way.
Current Water Conditions
Based on a USGS gauge 23.4 miles away
312 ft³/s
Current discharge — how much water is flowing
Much lower than usual for this time of year
Based on 2 years of record
2.74 ft
Water depth at gauge
64°F
CoolRefreshing for swimming
7-Day Discharge Trend
What does this mean for your visit?
Flow is well below normal for this time of year, so the waterfall may be a trickle. Water temperature is a refreshing 64 degrees F, good for a quick swim.
About This Gauge
This gauge is on a regional waterway. Conditions at the falls may differ, especially after local rain.
7-Day Flow Outlook
Based on the USGS gauge E. Br. Penobscot River below Grand Lake Matagamon (38 km away).
Today
Barely Flowing
312 cfs
5/10Tomorrow
Barely Flowing
312 cfs
4/10Sun
Barely Flowing
310 cfs
4/10Mon
Barely Flowing
332 cfs
3/10Tue
Low
341 cfs
4/10Wed
Barely Flowing
316 cfs
5/10Thu
Barely Flowing
299 cfs
5/10Best window: Today — barely flowing flow, sunny (trip score 5/10).
Best time of year: this gauge typically runs highest from mid March to late May, peaking in May.
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 Brownville Junction 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.
The ground through the falls loses about 62 feet in steep steps rather than one leap. The ground at the falls is roughly 638 feet above sea level.
The ground changes about 88 feet in the 500 feet above the falls and 25 feet in the 500 feet below. The falls face south and sit in full sun for most of the day, best photographed early or late.
Drag to compare. The dot marks the waterfall. The frame is about a mile across.
- Ground elevation
- 638 feet
- Measured by 1-meter lidar
- Drop at the falls
- About 62 feet
- Change in ground height within ~250 feet of the falls
- Faces
- South
- Sunlit most of the day. Go early or late for softer light.
A slice through the lidar ground surface, from above the falls to downstream (heading south).
Elevation data: USGS 3D Elevation Program. Aerial imagery: USGS The National Map. Public domain.
Location & Access
Getting There
Big Ambejackmockamus Falls is located near the Golden Road, a private logging road in Maine. Access typically requires driving along this road, which is unpaved and may have rough conditions. Visitors should use caution and ensure their vehicle is suitable for such terrain.
Get Directions on Google MapsParking
Parking is available along the Golden Road near the falls, but spaces may be limited and conditions can vary depending on the season.
Elevation
640 feet above sea level
Coordinates
45.865878° N, -69.091993° W
Visitor Tips & Gear
Bring bug spray during the warmer months, as mosquitoes and black flies can be prevalent. Be cautious on the Golden Road, as it is an active logging route with large trucks. Check weather conditions before visiting, as rain can make the road and trail slippery.
Where to Stay
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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Nearby Campground
Katahdin Woods and Waters National Monument Camping and Huts
22.7 miles away · 27 sites
Overview Katahdin Woods and Waters National Monument is located in Maine’s north woods. Katahdin Woods and Waters protects part of an extraordinary natural and cultural landscape: the mountains, woods, and waters where the East Branch of the Penobscot River and its tributaries, including the Wassataquoik Stream and the Seboeis River, run freely. Campsites, lean-tos and huts located throughout the monument provide opportunities to stay overnight while hiking, biking, paddling and enjoying other re
Book on Recreation.govAdditional Information
Nearby Attractions
Nearby attractions include Katahdin Woods and Waters National Monument and Baxter State Park, which offer additional hiking and outdoor activities.
Wildlife
The area is home to a variety of wildlife, including moose, deer, and birds. Visitors should be cautious and respectful of the natural habitat.
Nearby Waterfalls
LiDAR
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