Ultra Trail des Montagnes du Jura 2027
Which GPS watch for Ultra Trail des Montagnes du Jura
For Ultra Trail des Montagnes du Jura, what really matters in a watch is that the battery lasts to the finish. We estimate a mid-pack runner's time and recommend the watch whose battery covers it with margin.
Our recommendation
Suunto
Suunto Race 2
Racing watch with a 1.5" 2,000-nit AMOLED display, dual-band GPS and free offline maps. Up to 55 h in the most accurate mode and 18 days in smartwatch mode. Rotating crown, 115+ sport modes and 32 GB of storage for maps. A lot of watch for the money versus Garmin.
Why this watch
Ultra Trail des Montagnes du Jura is run over more than a day (estimate ~41h 35min). You need extreme battery life: a watch that can record 52 h or more in GPS, or one with a power-saving mode and on-the-go charging.
Other options to consider
Garmin
Garmin Instinct 3 Solar 50 mm
Ultra-rugged GPS watch with solar charging: up to 40 days in smartwatch mode (unlimited with sun), 60 h GPS and 34 h multi-band. Military-standard case, LED flashlight and dual-frequency GPS. For those who prioritise toughness and battery over onboard maps on their mountain outings.
Suunto
Suunto Vertical 2
Adventure watch with a 1.5" 2,000-nit AMOLED display, a bezel-integrated LED flashlight (white and red, with SOS mode) and free offline topo maps. Up to 65 h of dual-band GPS and 20 days of daily use. Built for long ultras, mountain traverses and night sections.
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