There is a local saying: south Xinjiang is for culture, north Xinjiang is for scenery. The north is high lakes and mountain pasture — Kanas, which travellers call 'God's private plot', where the lake changes colour with the weather and the autumn forest goes gold and crimson around water the colour of lapis; and the Yili valley, the wettest, greenest corner of the region, ringed on three sides by mountains with the Yili River running west towards the sunset.
The classic trip is a loop, not a point. From Urumqi you run north through the oilfields of Karamay and the ghost-city yardangs of Urho to Burqin, then up into the Altay to Kanas, Hemu and Baihaba — three Tuvan villages of log cabins half-sunk against the winter snow. Then you swing south-west past Sayram Lake, 'the last tear of the Atlantic', through the Guozigou gorge to Yining, and finish on the high grasslands of Nalati and Bayinbuluk before rolling back to Urumqi. About 3,036 km, and the roads themselves are half the show.
This is Kazakh and Tuvan country, and its people are as much the draw as the scenery. The Kazakhs have a proverb — among forty people there is always one god of happiness — and the hospitality is real: milk tea in a yurt, horse sausage and naren at a herder's table, the dombra coming out after dinner. The food follows the herd: skewers, pilaf, samsa, kumis, dried milk curds, and in Burqin the grilled cold-water fish of the Irtysh.
Be honest about the cost of the beauty. Distances are continental — Urumqi to Burqin alone is 619 km — and the season is short, June to October. In the park itself a plate of noodles can cost ¥45 and a bed in a herder's hut ¥50–100 a head. September and October are the golden weeks and the beds go with them; some hostels take no reservations at all. This is a trip you plan, then surrender to.