From Bishkek, follow the highway toward Kara-Balta until the turn to Sosnovka (just before the bridge over the Kara-Balta River). In Sosnovka there is an ecological checkpoint where a road fee must be paid (you can pay on site or in advance via Pay24 terminals or a local bank’s mobile app). Immediately after the checkpoint, the mountains begin.
Be prepared — a challenging road lies ahead. At first, the highway winds moderately, following the riverbed. On one of the bends, you can see a beautiful waterfall on the right (on the Turuk stream, a tributary of the Kara-Balta River), where there is a convenient stop. Further on, the ascent becomes steeper, the mountains grow higher and closer, and separate switchbacks appear as the road climbs higher terraces. A sharp right turn, several avalanche galleries, a viewpoint overlooking the valley — and finally the last section of serpentine brings you to the northern portal of the tunnel named after Kusein Kolbaev.
Before entering the tunnel, turn right onto a dirt road. You can leave your car there and walk about 2.5 km, or drive this stretch (it may be difficult in places for a regular sedan — check the road conditions). You’ve reached your destination!