LoamBehind the verdict
Every network's estimate is built from these. What Loam does with them is described in plain language on how it works.
Open-Meteo
Weather for every network: recent precipitation, temperature, humidity, wind, and the forecast ahead.
Weather data by Open-Meteo, used under CC BY 4.0USDA Natural Resources Conservation Service
Soil survey data: the texture and drainage behavior of the ground under a trail. It is most of the reason two networks in the same storm dry at different speeds.
US Government work, public domainSoilGrids, ISRIC World Soil Information
Soil properties for networks outside US soil survey coverage, including the Canadian catalog.
SoilGrids by ISRIC World Soil Information, used under CC BY 4.0. Poggio et al., SoilGrids 2.0, SOIL 7, 217-240, 2021USDA Forest Service and the Multi-Resolution Land Characteristics Consortium
Tree canopy cover, from the National Land Cover Database. Shaded trail holds water considerably longer than open ground.
US Government work, public domainUSGS and NASA elevation data
Elevation and slope for each network, served through OpenTopoData. Steep ground sheds water, flat ground holds it.
US Government work, public domainNational Park Service
Official alerts and closures for the parks that publish them. A current closure from the managing authority overrides the model.
US Government work, public domainMaps and trail names
OpenStreetMap contributors
Trail names and trail geometry, alongside published agency trail data.
Map data © OpenStreetMap contributors, available under the Open Database LicenseLoam is independent
Loam is not affiliated with, endorsed by, certified by, or partnered with any organization named on this page. Their data is public, and Loam uses it under the terms listed above. Naming them here is credit, not a claim of approval.
That is also why you will not find agency logos or seals anywhere on this site. Those marks are reserved for official use, and showing them would imply an endorsement that does not exist.
The verdict itself is a modeled estimate, not an official trail status. Check the trail, and respect posted closures and local guidance.
Something look wrong?
If a network's soil, canopy, or terrain reads wrong to someone who rides or maintains it, that is the most useful thing you can tell us. Email [email protected], or use the feedback controls in the app.