Snow Route Forecast
Check snow conditions now and over the next 48 hours for a GPX route. Uses satellite + weather data.
GPX file
How the snow forecast works
The tool samples your route at regular intervals and queries snow-depth and precipitation forecasts for each point. It combines current snow coverage with 24-hour and 48-hour predictions to show you where you'll encounter snow on the trail and how conditions will change over the next two days.
This is especially useful for early-season and late-season trail planning in the Alps and other mountain ranges, where snow conditions can vary dramatically between valley floors and summit ridges on the same route.
When to use it
Check your route before any high-altitude hike or run from October through June. The forecast helps you decide whether to bring microspikes, adjust your route to avoid snowfields, or postpone until conditions improve. It's also valuable for race preparation — knowing which sections of a course will be snow-covered helps you plan pacing and gear.
Privacy
Your GPX file is not uploaded. Only resampled coordinates are sent to the snow forecast API.
Frequently asked questions
Is there snow on my hiking route right now?
Choose your GPX file and press Analyze Snow. The page shows how much of the route is under snow now and the outlook for the next 24 and 48 hours, each with a confidence.
Where does the snow data come from?
The figure for now uses observed satellite snow where the satellite could see the ground, and fills in from the freezing level where it could not, for example under cloud. The page shows the satellite day used and when the data was last updated.
Why does a figure say N/A?
When 99.5% or more of the route is unknown in the data, the page shows N/A instead of a percentage. Observed unknown shows how much of the route the satellite could not see, for example because of cloud.
What do Spacing and Zoom do?
Spacing sets how often the route is sampled: every 50, 100 or 200 m, widened on a long route so that about 512 points or fewer are checked. Zoom sets the map tile level the snow data is read at.
Is my GPX file uploaded?
No. The file is read in your browser. Only the sampled points, as latitude and longitude, are sent to the TrailSplits snow API (api.trailsplits.com). Times, names and the rest of the file are not sent.