Siberian Sled Post Road

Timeline

1. c. 1490–1581Moscow and European Russia · RussiaUnder Ivan III and Ivan the Terrible, Russia formally established an official post system (yamskaya gon'ba) based on the Mongol jam system, requiring each station to provide horses, sleds, and guides for relay service for state documents, military deployment, and caravans, covering the main trunk routes of European Russia.
2. 1581–1620Tobolsk · SiberiaIn 1581 Cossack leader Yermak led a band across the Urals and conquered the Khanate of Siberia, opening the era of Russian eastward expansion. The tsarist government subsequently established winter forts (ostrog) across Siberia while extending the post-road network eastward: Tobolsk (founded 1587) became the hub of the West Siberian post road, and fur-trading centers along the Ob River were linked to Moscow by the post road.
3. 1619–1640Yeniseysk · Yenisei River basinThe founding of Yeniseysk fort in 1619 pushed Russia's frontier to the middle Yenisei. From 1621 through the 1630s, the post road extended eastward from Tobolsk along rivers and frozen tundra plateaus, linking the newly built forts. Winter sleds proved more efficient than summer horse transport across the vast taiga and boggy tundra, becoming the primary means of moving supplies and intelligence during this phase of Siberian expansion; fur tax (yasak) revenue was sent to the Moscow treasury via the post road.
4. 1640–1700Lake Baikal region · East SiberiaFrom the 1640s Russian expeditions reached Lake Baikal, and in 1648 Semyon Dezhnev's fleet rounded the northeast corner of Asia, proving Asia and America were not connected. As the fort network pushed toward the Pacific, the post road gradually extended, forming by the end of the 17th century a relay system of several thousand kilometers linking Moscow to the Sea of Okhotsk; it later became an important foundation for Peter the Great's Siberian administrative reforms and the implementation of the Sino-Russian Treaty of Nerchinsk (1689).