USBR 81
166 km mapped · cycling route · the United States · national route network · route ref 81
How long is USBR 81?
USBR 81 is mapped at 166 km (103 miles) in the TrailsPals route library. The line is stored as 2,714 points simplified from the OpenStreetMap relation. Mapped length counts every section in the relation, including alternatives and connectors, so a specific end-to-end trip can measure less.
Where does USBR 81 go?
The mapped line lies in the United States, between 46.34°N and 47.26°N and between 117.38°W and 117.04°W. That bounding area measures roughly 26 km east to west and 102 km north to south. It describes how far the mapping reaches, not the distance you would travel.
Is USBR 81 open right now?
This page cannot tell you. TrailsPals shows condition reports left by other travellers on the map, and those are unverified: nothing here establishes that a cycling route is open, legal or safe to use. Check the land manager or route authority close to departure.
Can you follow USBR 81 in TrailsPals?
Yes. Loading USBR 81 in the iPhone app gives you the line to follow, an off-route nudge, condition reports from other travellers, and a watch link someone at home can open without installing anything. Live updates need a data connection, and TrailsPals does not contact emergency services.
Route geometry from OpenStreetMap relation 12916368, via Waymarked Trails. © OpenStreetMap contributors, ODbL.
Before you go
Plan the trip before you follow the line: tell someone where you are going and when you expect to be back with a check-in plan, and share a live location link so they can see your progress without installing anything. Read how accurate phone GPS is on a trail and what to do if you lose the route. For shorter walks, browse the city trail guides.
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The interactive map, condition reports and trips recorded on this cycling route load below.