Everyone knows the flower from the Alps. It came from here — and so does everything else on this route.

Edelweiss is an Asian plant. It walked west during the ice ages, got adopted by Switzerland, and became someone else’s national symbol. In Mongolia it simply never left. It grows from montane steppe up into the alpine belt — stony slopes, thin meadows, river terraces, and the open glades of the northern larch forest.

What looks like white petals are bracts: modified leaves packed with hollow woolly hairs. The trapped air scatters light, which is why a hillside of edelweiss reads silver rather than white, and why it changes completely as the sun moves across it. The actual flowers are the small yellow florets in the middle.

Following where those hillsides are — and when — pulls you across a remarkable cross-section of the country. The flower is the thread. The rest is why the trip is worth eleven days.

A Mongolia most visitors never see. Five of the country’s six major ecological zones, in 1,680 kilometres: open steppe, the dune belt at Elsen Tasarkhai where sand meets grassland, the montane forest-steppe of the Khangai, the alpine belt above 2,000 metres, and the southern edge of the Siberian taiga, where larch forest runs north toward Lake Baikal. Semi-desert on Tuesday, wet green horse country by Friday.

The best climate in Mongolia, at exactly the right time. While the Gobi is pushing 35°C in July, the high camps sit in the low to mid twenties by day and chill off at night — dry air, no humidity, and light that lasts until nearly ten in the evening. Altitude is the reason this route is comfortable in high summer when much of the country isn’t.

Camping where the horses are. Several nights are spent in the meadows rather than driving back to a lodge from them: a high camp on the Cachirt plateau above 2,000 metres, the silver valleys south of Khujirt, the basalt rim above the Orkhon. You wake to horses grazing past the tent because you’ve camped where they live. Dawn and dusk are the two hours edelweiss is worth photographing, and you’re already standing in it for both.

Rivers you can actually get into. The Orkhon cut a black basalt trench through old lava. The Eg runs clear and cold off Khövsgöl. At the lower Orkhon, herders swim their horses across in the late afternoon — and you can swim too, which almost no Mongolia itinerary offers, because most of them are in the desert.

Close to the families who own the landscape. Teshig, Khyalganat, the northern river valleys — this half of the country sees almost no tourism. Around 40% of the route runs on dirt tracks, sandy tracks, or no track at all. Most days you share the view with livestock and the herding families who own them, and with no other vehicles. Visits happen because you’re camped nearby, not because a stop was scheduled.

• Species — Leontopodium ochroleucum, with L. leontopodioides lower down
• Mongolei — Эгэл цагаантүрүү, egel tsagaantüruu
• Height — 5–25 cm; forms low cushions, rarely stands alone
• Bloom — Late June to late August. Dries on the stem and holds its shape for weeks
• Also in flower — Feather grass, gentians, pulsatilla, wild thyme; northern meadows tall enough to brush the wing mirrors
• Status — Protected in Mongolia. We photograph it. We don’t pick it.

The route climbs to find the flowers, then drops to the rivers.

Wildflower density tracks altitude and substrate more than latitude, and the elevation profile below is the shape of the whole trip: two high camps in the first week where the meadows are thickest and the air is coolest, then a long descent into the northern forest-steppe, the Eg, and the Selenge basin. Tap any stop to jump to that day.