FlowDirt: mountain bike trail planner

FlowDirt is in beta

Everywhere in the US

Lidar elevation, public land, roads and existing trails.

Private land is checked in

Anywhere else, FlowDirt can't see private parcels yet, so check who owns the land before you build.

Want your state next?

FlowDirt

FlowDirt plans a mountain bike trail between two flags you drop on the map.

Lay out a trail

Click the map where the trail starts, then where it ends.
Press Find the trail.
Drag a flag or the trail to change it. Click the map again to add a point it has to pass.

To keep it out of a spot, like a wet meadow, use Avoid an area. To change how steep or twisty it can be, open Under the hood.

What it won't do

Go steeper than 15%, or 18% on a downhill.
Cross private land, golf courses or school grounds unless you say you have permission.
Run along a paved road. It can cross one.

Saving and sharing

Trails save in this browser as you work. Your trails opens an old one and New trail starts over. Share & export gives you a link, an image, a page to print, or a GPX for your GPS.

Shortcuts

Enter find the trail · F zoom to it · Esc cancel · Cmd or Ctrl + Z undo

Where it works

Lidar, public land and roads cover the US. Private land is checked in seven states so far; tap Beta at the top for the list.

Before you build

Walk the line and get the land manager's OK.

Data

USGS lidar and topo maps, PAD-US public land, City of Boise land, Idaho parcels, Census roads, OpenStreetMap, and Esri or USGS imagery. Search by Nominatim.