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 570
Running watch with AMOLED display, dual-frequency multi-band GPS, full-color topo maps and onboard music. 20 h in GPS mode with maps (13 h multi-band) and up to 11 days in smartwatch mode, at 47 g. The first Forerunner with full navigation, sitting between the Forerunner 265 and the Forerunner 965.
Garmin
Garmin Instinct 3 AMOLED 45 mm
Rugged mountain watch (MIL-STD-810) with AMOLED display, multi-band GPS and onboard topo maps. 13 h in GPS mode with maps on (up to 30 h in standard GPS) and 8 days in smartwatch mode, at 53 g. The AMOLED version fills the gap left by the Instinct 3 Solar, which has no maps.
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