Ultra Trail Gredos 2026
Which GPS watch for Ultra Trail Gredos
For Ultra Trail Gredos, 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
Garmin
Garmin Forerunner 265
Running watch with AMOLED display, dual-frequency multi-band GPS and onboard music. 20 h in GPS mode (14 h multi-band) and 13 days in smartwatch mode, at 47 g. The perfect balance of accuracy, advanced metrics and price for training and racing from 10K to marathon.
Why this watch
Ultra Trail Gredos is an ultra: you'll finish in around 15h 21min. Your watch must record at least 20 h of GPS without recharging. Prioritise battery life and, if needed, drop to standard GPS mode to reach the finish with charge to spare.
Other options to consider
Garmin
Garmin Forerunner 965
Premium running watch with a 1.4" AMOLED display, onboard topo maps, multi-band GPS and music. Up to 31 h in GPS mode (19 h multi-band) and 23 days in smartwatch mode, at just 53 g. Garmin's top running watch without the bulk of a Fenix: ideal for marathons and single-day ultras with accurate navigation.
Polar
Polar Pacer Pro
Ultra-light running watch (41 g) focused on power-based training and Polar's running metrics. 35 h of battery in GPS mode and breadcrumb navigation. Simple, thin and comfortable, with one of the best training-analysis platforms for road and light-trail runners.
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