Summit Flat
Summit Flat Trail is a 15 miles snow trail in Boise National Forest, Idaho. The Forest Service rates it trail class 4, highly developed. It is open to snowmobile, snowshoeing and cross-country skiing.
Trail conditions, closures and hazards are not tracked here. The Boise 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 | 43.9320, -115.6696 · Directions ↗ |
| Other end | 43.9654, -115.8443 · 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
| Length | 15 miles |
| Trail class | 4, highly developed |
| Type | snow trail |
| Surface | snow |
| Typical tread width | 18-24 inches |
| Motor vehicles | Open to at least one motorized use |
| Accessibility | Not evaluated |
| Trail numbers | SNO-281003 |
| Forest | Boise National Forest (unit 0402) |
| States | Idaho |
| 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.
Allowed uses
| Snowmobile | Allowed year-round |
| Snowshoeing | Allowed year-round |
| Cross-country skiing | Allowed year-round |
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
No season published · listed none | 0.1 mi |
Distance is from the point to the nearest part of the trail line. Season text is what the forest wrote and is often a season name rather than a date. The recreation page link goes to the Forest Service site, which may redirect to the forest's recreation index.
Camping nearby
Campsite Atlas cards carry site counts and booking links from Recreation.gov. Forest Service cards come from the recreation layer and link the agency page.
Fire nearby
- WildfireCrooked
15 mi from the trail midpoint · 10,081 acres · 97% contained
- WildfireBuckhorn
45 mi from the trail midpoint · 157 acres · 46% contained
Distance is to the reported incident point, not the fire edge. Closure orders are on the forest's official page.
Reference
Questions people ask
How long is the Summit Flat Trail?
15 miles, the sum of the 1 segment the Forest Service records under this name in Boise National Forest.
Source: Forest Service trail layer
What is allowed on the Summit Flat Trail?
snowmobile, snowshoeing and cross-country skiing. The trail is open to at least one motorized use.
Source: Forest Service trail layer
Where does the Summit Flat Trail start?
The line begins at 43.9320, -115.6696 and ends at 43.9654, -115.8443. The nearest recorded trailhead is Mores Creek Summit Trailhead, 0.1 miles from the line. The record does not say which end is the usual start.
Source: Forest Service trail layer
Is the Summit Flat 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 Summit Flat Trail?
Bad Bear Campground (1.9 mi), Hayfork Group Cg (1.9 mi) and Edna Creek Campground (1.9 mi) are within five miles of the trail. Site counts and booking links are on Campsite Atlas.
Source: Campsite Atlas
How developed is the Summit Flat Trail?
Trail class 4, which the Forest Service describes as highly 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 Summit Flat Trail?
The typical tread is 18-24 inches wide.
Source: Forest Service trail layer
Who manages the Summit Flat Trail?
Boise National Forest, Forest Service unit 0402. The trail is in Idaho.
Is there a fire near the Summit Flat Trail?
2 active incidents within 50 miles of the trail midpoint as of 2026-09-17, the nearest Crooked at 15 miles. Check the forest's closure orders before you go.
Source: Fire nearby
Source
This page is built from 1 segment named SUMMIT FLAT in the Forest Service TrailNFS_Publish layer, administrative unit 0402. 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 September 17, 2026. The methodology page explains how segments become trails.