Trail race training blueprint
Zegama is where mountain running legends are forged.
At 42.4 km with 2,661 m of climbing, this distance challenges both endurance and climbing ability without the time-management demands of a full ultra. With 63 m of vertical per kilometer, expect significant hiking sections — training should emphasise power-hiking and efficient descending. The official cutoff is 8 hours, so pace management starts from week one.
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Steep grass climbs, exposed rocky ridges, technical descents through beech forests. The Sancti Spiritu climb is iconic.
Late May in the Basque Country: expect anything from sun to fog, rain, or even snow on the summit.
Swap concrete training days, or mark a day done/skipped without changing the race-specific template.
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Key sessions include route buttons that deep-link into the Planner with pre-filled distance + elevation filters.
The plan is scaled from the race profile, not a generic road-running template.
Training emphasis: sustained climbing, downhill resilience, and efficient hike-run transitions.
If your race has a time limit, this estimates the minimum average pace and whether your target finish time clears the cutoff.
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Disclaimer: this plan is general information, not medical advice. Adjust based on fatigue, experience, and injury history.
At 42.4 km with 2,661 m of climbing, this distance challenges both endurance and climbing ability without the time-management demands of a full ultra. With 63 m of vertical per kilometer, expect significant hiking sections — training should emphasise power-hiking and efficient descending. The official cutoff is 8 hours, so pace management starts from week one. This training plan adapts the 16-week structure specifically for 42.4 km with 2,661 m of elevation gain, scaling weekly volume and vert targets so your body is ready for race-day demands.
This distance sits at the boundary between endurance and speed — long enough to require serious aerobic preparation, but short enough that pace efficiency and descending technique make a real difference. The plan builds weekly volume progressively while including hill-specific sessions to sharpen climbing and descending rhythm.
The 16-week programme is divided into four phases designed around the specific demands of 42.4 km and 2,661 m of climbing:
At 63 m of vertical per kilometer, the Zegama-Aizkorri 42K course is significantly steeper than average. Training should include dedicated power-hiking sessions (poles recommended), steep downhill technique drills, and eccentric strength work for quad resilience. Practice eating and drinking on steep climbs — this is where many runners lose time to nausea and energy dips.