LiDAR terrain view · USGS 3DEP
Rotary Falls
By Armen Suny · Last verified Oct 2026
Partly frozen · 4 days below freezing LiDAR & 3D terrainDifficulty
Hard
Trail Type
Out And Back
About Rotary Falls
Rotary Falls is a small waterfall on the slopes of Government Peak in the Mat-Su Borough's Government Peak Recreation Area north of Palmer. The Government Peak trail passes a signed side trail at about 2,500 feet, about halfway up, that leads east to a picnic table overlooking a small waterfall. The main trail is steep, gaining about 3,700 feet in about 3 miles to the 4,781-foot summit.
The Setting
Rotary Falls sits at 2,339 feet within Knik Alaska Native Village Statistical Area, in the hills of Alaska.
Trail & Hike Details
Trail Description
From the Government Peak Recreation Area parking, follow the Pioneer Loop and Matanuska Loop ski trails to the Government Peak trail sign, then climb steeply through trees past picnic tables. About halfway up, at around 2,500 feet, a signed side trail leads east to a picnic table with a view of the falls.
What to Expect
Dogs are welcome.
Accessibility
The trail involves steep, uneven terrain with significant elevation change and is not accessible to mobility devices.
Frequently Asked Questions
🐶 Are Dogs Allowed at Rotary Falls?
✅ Dogs are allowed
Hiking Project lists dogs as allowed off-leash on the Government Peak trail; check Mat-Su Borough rules for the recreation area.
Are There Any Fees or Permits Required?
🤑 Fees are required
🏊 Is There Swimming at Rotary Falls?
❌ Swimming is not allowed
When to Visit
Spring and summer are the best times to visit Rotary Falls, as the weather is more favorable, and the falls are typically at their fullest due to snowmelt and rainfall.
Seasonal Access
The best time to visit is Spring, Summer, Fall, and Winter.
Safety Information
Water temperature is currently 32°F — cold enough to cause numbness quickly. Avoid prolonged water contact and use caution near the falls.
The trail can be slippery, especially after rain. Be cautious of wildlife and carry bear spray if hiking in the area. Always stay on marked trails.
Current Water Conditions
These readings come from the USGS gauge on L Susitna River, 2.2 miles away, not on Rotary Falls's own stream. Use them as a sign of whether the area is running wet or dry.
140 ft³/s
Current discharge — how much water is flowing
Higher than usual for this time of year
Based on 78 years of record
2.51 ft
Water depth at gauge
32°F
Dangerously coldRisk of cold shock
7-Day Discharge Trend
What does this mean for your visit?
The water is flowing higher than usual for this time of year. Water temperature is dangerously cold at 32 degrees F, avoid prolonged contact.
About This Gauge
7-Day Flow Outlook
Based on the USGS gauge L SUSITNA R NR PALMER AK (4 km away).
Today
Moderate
146 cfs
8/10Tomorrow
Moderate
136 cfs
8/10Sun
Moderate
138 cfs
5/10Mon
Moderate
145 cfs
6/10Tue
Moderate
130 cfs
8/10Wed
Moderate
129 cfs
6/10Thu
Moderate
126 cfs
6/10Best window: Today — moderate flow, sunny (trip score 8/10).
Best time of year: this gauge typically runs highest from late May to early August, peaking in June.
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 Fishhook hit peak flow. We only send when conditions are worth the trip — no weekly newsletters, no spam.
Is Rotary Falls Frozen?
Updated about 20 hours agoPartly frozen 4 days in a row below freezing 2 more freezing days forecast
Rotary Falls is probably icing up: 4 days in a row below freezing, with 2 more freezing days in the forecast. Expect icicles and ice at the edges with water still running through the middle.
- Days below freezing
- 4 of the last 14
- Current cold streak
- 4 days
- Freezing days ahead
- 2 of the next 7
- Flow
- 136 ft³/s
Winter safety. Frozen falls are the one waterfall trip with a documented injury pattern: falling ice, and ice-glazed rock and trail. Wear microspikes, keep well back from the base and from overhangs, and never walk out on ice over moving water.
Estimate from Open-Meteo daily temperatures at the falls, the LiDAR-measured facing direction, and the nearest stream gauge. It is a likelihood, not a report from the trail. See every frozen waterfall in Alaska.
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 452 feet in steep steps rather than one leap. The ground at the falls is roughly 2,319 feet above sea level.
The whole reach is steep: about 396 feet of descent in the 500 feet above the falls and another 210 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
- 2,319 feet
- Measured by 3-meter lidar
- Drop at the falls
- About 452 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
From Palmer, take Palmer-Fishhook Road toward Hatcher Pass. At mile 7, turn left onto Edgerton Parks Road, drive 1 mile, and turn right on Mountain Trails Drive to the Government Peak Recreation Area.
Get Directions on Google MapsParking
Park at the Government Peak Recreation Area. Parking is $5 or a $40 Mat-Su Borough annual pass, and the gate at the bottom of Mountain Trails Drive is open 8 a.m. to 10 p.m.
Elevation
2,339 feet above sea level
Coordinates
61.720000° N, -149.294444° W
Land Management
Managed by TRIB
Visitor Tips & Gear
The trail is steep; bring poles and water. Leave the lot before the gate closes at 10 p.m.
Where to Stay
The Pioneer Motel
Colony Suites
Beautiful and Comfy Palmer Gem Near Hatcher Pass
Northern Nights Lodging
Browse vacation cabins and private rentals nearby
Unique outdoor stays — tents, yurts, and treehouses
Rent a campervan or RV for your waterfall road trip
Some links are affiliate links. We may earn a commission at no extra cost to you.
Additional Information
Nearby Attractions
Government Peak summit, the Government Peak Recreation Area trail system, and Hatcher Pass.
Wildlife
Visitors may encounter local wildlife such as birds, squirrels, and occasionally bears. Exercise caution and follow wildlife safety guidelines.
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