Treadwell Ditch Trail
Treadwell Ditch Trail is a 10-mile trail in Tongass National Forest, Alaska. The Forest Service rates it trail class 3, developed. It is open to hiking, horse and pack stock, mountain biking, motorcycle, ATV and e-bikes.
Trail conditions, closures and hazards are not tracked here. The Tongass National Forest official page carries current alerts and closure orders.
Map
One end Other endLine simplified to about 100 metres. Basemap from the USGS National Map.
| One end | 58.2864° N, 134.4358° W · Directions ↗ |
| Other end | 58.3201° N, 134.5201° W · Directions ↗ |
The ends are the two ends of the longest connected chain of segments. The record does not say which is the usual start. The trail is recorded as 70 segments.
The trail
| Length | 10 miles |
| Trail class | 3, developed |
| Type | land trail |
| Surface | native material |
| Typical grade | 0-5 percent, 5-8 percent, 8-10 percent, 12-20 percent, 20-30 percent, 10-12 percent |
| Typical tread width | 12-18 inches, 36-48 inches, 60-96 inches |
| Motor vehicles | Open to at least one motorized use |
| Accessibility | Not evaluated |
| Trail numbers | 33718 |
| Forest | Tongass National Forest (unit 1005) |
| States | Alaska |
| Detail published | management level, with uses |
Values are the set across all segments. Class 1 is minimally developed and class 5 is fully developed. Grade and width are the forest's typical values, not measured extremes.
Weather by month
Allowed uses
| Hiking | Allowed 05/15 to 09/15 (month/day) |
| Horse and pack stock | Allowed |
| Mountain biking | Allowed year-round |
| Motorcycle | Allowed 12/15 to 04/15 (month/day) |
| ATV | Allowed 12/15 to 04/15 (month/day) |
| E-bikes | Allowed 12/15 to 04/15 (month/day) |
A use is listed when the Forest Service records it as managed, accepted or discouraged on any segment. Discouraged still means legal. Uses marked restricted are left out. Where the forest publishes a Motor Vehicle Use Map, that map governs motorized use.
Trailheads
The Forest Service recreation layer records no trailhead within a third of a mile of this trail's line. Many trails start from a road pullout or another trail with no trailhead record. The forest's recreation pages list the trailheads it does publish.
Trails nearby
Camping nearby
No federal campground is recorded within five miles of the trail. Dispersed camping is allowed on most National Forest land outside posted closures. The forest office has the current rules.
Explore
Historic places nearby
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Reference
Questions people ask
How long is the Treadwell Ditch Trail?
The Forest Service records 10 miles under this name in Tongass National Forest, the sum of 70 segments.
Source: Forest Service trail layer
What is allowed on the Treadwell Ditch Trail?
Hiking, horse and pack stock, mountain biking, motorcycle, ATV and e-bikes are allowed. The trail is open to at least one motorized use. Some uses are seasonal. The allowed uses section lists the dates.
Source: Forest Service trail layer
Where does the Treadwell Ditch Trail start?
The line begins at 58.2864° N, 134.4358° W and ends at 58.3201° N, 134.5201° W. No Forest Service trailhead is recorded within a third of a mile of it. The record does not say which end is the usual start.
Source: Forest Service trail layer
Is the Treadwell Ditch Trail in a wilderness area?
No. The trail line does not cross any polygon in the National Wilderness Preservation System layer.
Source: Wilderness Connect
Where can I camp near the Treadwell Ditch Trail?
No federal campground is recorded within five miles of the trail. The camping section covers dispersed camping, which most National Forest land allows.
How developed is the Treadwell Ditch Trail?
Trail class 3, which the Forest Service describes as developed. Class 1 is a minimal, unimproved route and class 5 is fully developed, often paved.
Source: Forest Service trail layer
How steep and how wide is the Treadwell Ditch Trail?
The typical grade is 0-5 percent on most segments and 5-8 percent or 8-10 percent or 12-20 percent or 20-30 percent or 10-12 percent on others. The typical tread is 12-18 inches wide.
Source: Forest Service trail layer
Who manages the Treadwell Ditch Trail?
Tongass National Forest, Forest Service unit 1005. The trail is in Alaska.
Source
This page is built from 70 segments named Treadwell Ditch Trail in the Forest Service TrailNFS_Publish layer, administrative unit 1005. Wilderness overlap is tested against the National Wilderness Preservation System layer from Wilderness Connect. Trailheads and Forest Service campgrounds come from the Forest Service Recreation Opportunities layer. Data refreshed November 1, 2026. The methodology page explains how segments become trails.