Plan · Brief · Track · Relive

Your GR20 Companion

Plan your stages, get daily morning briefings, navigate with offline maps, and track every step. One free app from start to finish.

Get Started See Features
178 km of trail
26 possible stopovers
+11,340 m ascent
Stage Planner

Your GR20, your pace

No hiking app plans your GR20 for you. Set your days and fitness level — the algorithm splits the trail into optimal stages across refuges and bergeries. Or go manual with rest days. No spreadsheets, no guesswork.

Try the Planner
Planning screen showing auto-plan with fitness profiles
Morning Briefing

Wake up, check, walk

No other app gives you this. Each morning: today's distance, elevation, weather, water points and key waypoints — plus your booking reference. One screen, ready to go before you lace up.

Morning briefing screen showing day's stats, elevation profile, and terrain info
GPS Navigation

Never lose the trail

Your position on the GR20 in real time — with direction arrow, off-trail warnings, and distance to your next stop. Full topo map with contour lines works without signal. Battery-saving mode built for multi-day use.

Navigation screen with live GPS position on topo map
Trek Log

Your trek writes itself

Mark arrivals, track actual vs. planned times, and see your daily stats build up. Distance, ascent, and duration logged day by day — your GR20 diary in numbers, without writing a word.

Trek log screen showing daily stats and progress
⛰️

Elevation Profiles

Every stage color-coded by steepness with technical sections highlighted.

🏠

26 Stops Detailed

Including bergeries and bivouacs other apps miss. Booking links, distances, facilities.

📤

GPX Export

Download your planned route or recorded track as GPX. Share with friends or load into any GPS device.

Know Before You Go

Season
June – September
Snow on northern passes until mid-June. Book refuges months ahead — they fill up fast.
Duration
10 – 16 days
Trail runners do it in 5. Most hikers take 12–16 walking days plus rest days.
Difficulty
Hard — technical
Scrambling, chains, exposed ridges. The north is significantly harder than the south.
Distance
178 km · +11,340 m
Calenzana to Conca (or reverse). 26 possible stops along the way.

I built RandoNav because I couldn't find a single app that actually plans the GR20 for you. Every tool out there is generic — made for any trail, good for none. This one knows every refuge, every bergerie, every water point. It's the app I wished I had on my own GR20.

— Roel, hiker & developer

Ready to Plan Your GR20?

Free, offline, no account needed. Works on any phone.

Open the Planner