LiDAR bare-earth terrain around Tenmile Falls near Trego, Montana, showing about 186 feet of drop, a steep tiered drop, facing south LiDAR terrain view · USGS 3DEP

Tenmile Falls

Montana

By Armen Suny · Last verified Sep 2026

LiDAR & 3D terrain
Kootenai National Forest NF · US Forest Service

Difficulty

Moderate

Trail Length

2.0 miles

Trail Type

Out And Back

Elevation Gain

300 ft

About Tenmile Falls

Tenmile Falls is a picturesque waterfall located in Montana, known for its serene surroundings and natural beauty. It is a popular destination for hikers and nature enthusiasts seeking a peaceful retreat.

The Setting

Tenmile Falls sits at 4,042 feet within Kootenai National Forest, fed by the Kootenai River Bl Libby Dam, in the mountains of Montana.

Trail & Hike Details

Trailhead Falls
2.0 mi distance 300 ft climbed

The Approach

The moderate hike follows Tenmile (#21), a 2.0-mile out-and-back trail over natural surface. Expect 300 feet of elevation gain with grades of 8-10%. The trail is minimally developed (Class 1).

USFS Trail

TENMILE #21

Trail Class

Minimally Developed

Surface

Native Material

Avg Grade

8-10%

USFS Segment

0.11 mi

Trail Description

The trail to Tenmile Falls winds through a forested area, offering scenic views of the surrounding landscape. The path may include some rocky or uneven sections, so sturdy footwear is advised.

What to Expect

Dogs are welcome.

Accessibility

The trail is not wheelchair accessible. Uneven terrain and elevation changes require steady footing.

Frequently Asked Questions

🐶 Are Dogs Allowed at Tenmile Falls?

✅ Dogs are allowed

Are There Any Fees or Permits Required?

🆖 No fees required

🏊 Is There Swimming at Tenmile Falls?

❌ Swimming is not allowed

When to Visit

spring summer fall

Spring and early summer are ideal, as the waterfall is typically at its fullest due to snowmelt.

Seasonal Access

The best time to visit is Spring, Summer, and Fall. Winter access may be limited. Check with Kootenai National Forest for seasonal road closures.

Safety Information

Be cautious of slippery rocks near the waterfall. Carry bear spray and be aware of wildlife in the area. Check weather conditions before visiting, as trails may become muddy or hazardous after rain.

7-Day Flow Outlook

Based on the USGS gauge Kootenai River bl Libby Dam nr Libby MT (27 km away).

Moderate confidence
Barely Flowing right now
6320 cfs
→ Holding steady
16128881620TodayTomorrowSunMonTueWedThu

Today

Low

6826 cfs

4/10

Tomorrow

Low

6589 cfs

6/10

Sun

Barely Flowing

6328 cfs

5/10

Mon

Barely Flowing

6336 cfs

5/10

Tue

Barely Flowing

6328 cfs

5/10

Wed

Low

6834 cfs

4/10

Thu

Low

6901 cfs

4/10

Best window: Tomorrow — low flow, partly sunny (trip score 6/10).

Best time of year: this gauge typically runs highest from early November to late December, peaking in December.

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 Trego 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 186 feet of descent through Tenmile Falls, a steep tiered drop rather than a single free fall. The brink sits at about 4,084 feet above sea level.

Steep ground runs through the entire stretch: about 178 feet of descent in the 500 feet above the pin and 148 feet in the 500 feet below it. Facing south, the falls sit in full sun for most of the day, best photographed early or late.

Aerial photo of the same ground around Tenmile Falls near Trego, Montana, for comparison with the lidar view LiDAR bare-earth terrain around Tenmile Falls near Trego, Montana, showing about 186 feet of drop, a steep tiered drop, facing south
Aerial LiDAR bare earth

Drag to compare. The dot marks the waterfall. The frame is about a mile across.

Ground elevation
4,084 feet
Measured by 1-meter lidar
Drop at the falls
About 186 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.
Ground profile through the falls

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

Tenmile Falls is located near Helena, Montana, in the Tenmile Creek area. Access typically involves driving to a trailhead followed by a hike. Specific directions may vary, so consulting a map or local resources is recommended.

Get Directions on Google Maps

Parking

Parking is available at the trailhead, but spaces may be limited during peak seasons.

Elevation

4,042 feet above sea level

Coordinates

48.618571° N, -115.171831° W

Land Management

Kootenai National Forest NF

Managed by USFS

Where to Stay

Some links are affiliate links. We may earn a commission at no extra cost to you.

Nearby Campground

Barron Creek Boating Site

9.1 miles away · 0 sites

The Barron Creek Boating Site is approximately 25 miles northeast of Libby on FDR road 228. This camping area has seven sites. The 3 sites in the open area have fire rings and vault toilet nearby and are able to accomodate up to a 40' rv. The 4 sites in the boat dock parking area have a vault toilet nearby. Campground road and boat ramp are paved, parking spurs and loops are of native material. Amenities include vault toilets, and a fully developed boat ramp with dock.

Book on Recreation.gov

Additional Information

Nearby Attractions

Helena National Forest, Mount Helena City Park

Wildlife

The area is home to various wildlife, including deer, birds, and small mammals. Be cautious of potential encounters with bears or other larger animals.

Cities near Tenmile Falls

Nearby Waterfalls

15.5 miles away
Montana
Moderate
2.0 miles 300 ft

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