The trail from San Gerardo de Rivas to the Crestones refuge beneath Chirripó takes no prisoners. It ascends from 1,523 meters above sea level at KM 0 to the high-altitude páramo at 3,393 meters of elevation some 14 kilometers later. There is no easing in and no warm-up period. The ascent starts immediately and continues relentlessly for much of the hike. Some relatively flat parts appear like a mirage midway through the hike, but they are few and far between. By far, the hardest part of climbing Chirripó is making it through this slog of an approach hike. If one has the time to spend a night or two at the refuge, the actual summit push is a cake walk compared to the effort required to reach base camp.
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