Ascent Passport

1. Altai, South Chuya Ridge, classifier section 1.3
2. Irbistu, 3967 m, via the western edge.
3. Proposed category: 1B.
4. Route type: combined.
5. Elevation gain: 750 m. Route length: 1600 m. Length of sections with category V: 0, category VI: 0. Average slope: 28°.
6. Pitons left on the route Total: 0, bolted pitons: 0.
7. Team's total climbing time: 7.5 hours, 1 day.

Irbistu peak via the center of the North-West slope, 2B cat. diff., combined, by Barnov S.I. Altai, South-Chuya Ridge 1.2

Passport

1. Class: combined.
2. Altai, South-Chuya Ridge, Elangash valley, 1.3
3. Irbistu peak via the center of the North-West slope. Coordinates: (49°45.536′ N, 88°05.186′ E, height 3967, 3963 according to navigator)
4. Proposed — 2B cat. diff., first ascent.
5. Elevation gain: 1000 m (between the summit and intermediate camp: 1157 m); length — 2500 m. Average steepness of the route — 30–35 degrees.

Peak Irbistu (Tymomu)
via the left part of the Northwest slope,
3A — snow-ice climb,
Korneev V.S.
Altai, South-Chuya Ridge 1.2.

Ascent Passport

1. Class: snow-ice climb.
2. Altai, South-Chuya Ridge, Elangash valley 1.3.
3. Peak Irbistu (Tymomu), coordinates 49°45.536 N, 88°05.186 E,