I. Class of ascent — rock

2. Re­gion of as­cent — Pami­ro-Alai, southern bran­ches of the Gis­sar ridge, Igi­zak valley
3. Ver­tex Big Igi­zak, 4100 m, via the left edge of the NE wall
4. As­sumed dif­fi­cul­ty cat­egory — 45635 г 505, №14(3–81)
5. Route characteristics: height difference — 240 m, average steepness — 60°, length of sections — total — 405 m, 2nd difficulty grade — 70 m, 3rd difficulty grade — 112 m, 4th difficulty grade — 195 m, 5th difficulty grade — 20 m
6. Rock hooks ham­mered in to cre­ate i.t.o.
7. Num­ber of tra­vel hours — 8 hours
8. There were no over­nights
9. Group com­po­si­tion:

Krasnoukhov D. B. — Master of Sports of the USSR, team leader Gusev V. S. — Master of Sports of the USSR, Kudrya­shov V. S. — Candidate for Master of Sports of the USSR. Team coach — Master of Sports of the USSR Sogri­na Z. G.

II. Date of de­par­ture and re­turn — August 23, 1979