It's an interesting route with only a few of signals, a map is very useful.
Approach to Sabiñanigo by N-240 (west, from Pamplona across Jaca) or N-330 (south, from Huesca). In Sabiñanigo, C-136 to Biescas. In Biescas take direction to Gavín and Ordesa across N-260 to Yésero. The trailhead is a forest track with barrier 1,8 km after the crossroad of the village.
The trail of Yésero (1160 m) is found in a curve pronounced before the port of Cotefablo coming from Biescas (km-495). By trail we will be reached the samll free hut (1525 m, 5 places). The path will continue to the left by a grassy slope on the river to a new refuge (1840 m, 3 places, badly state) before reaching the meadow of the Port of Yésero. In this place disappear the cairns (signals with stones) and you can take several options :
A)- forward, to the bottom of Ripera (peak of left side of Tendeñera), elevating some 50 m to the right revolves to the left to catch a rocky drainpipe rotating later to the right for surpass the buttress in short climb (I). The direction toward the hillock will be sought between Ripera and Tendeñera until reaching a ramp toward the hillock. It's a route bad indicated that I have not found more than in some book and T didn't locate on the terrain (F.sup.).
B)- continuing for the right, in direction to the hillock next to the peak Nabariecho, we will be abandoned to go toward the N. in an evident grassy step. After some easy ascent (I) another buttress is surpassed to reach a karstic labyrinth in which various cairns will carry us to a ramp next to a short chimney (II, 6 m). It's important a lot of attention to the cairn to locate it in the descent. We will reached Col of Ripera. It's a route indicated but more difficult technically (P.D.inf.).
Since the Col of Ripera (2710 m) some plans of path goes to the right by hardly slope (30º with snow), a few of meters under the edge, requiring some low ascent (I) in very decomposed rock. We will reach the main top without need to continue the sharp edge that possess the routes from the East.
Map, compass, good boots.
Early on the season (spring) are necessary crampons and ice-axe when the snow cover the access from col of Ripera.
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