Permafrost is ground that remains frozen for longer than two consecutive years, and it may or may not contain significant amounts of ice. In southern Yukon, less than 25% of the land area is underlain by permafrost. In central Yukon, the distribution of permafrost is more extensive but still discontinuous, while north of Dawson, it is nearly continuous. Permafrost is generally thicker and colder as you move further north. It may be over 300 m thick and colder than -3° C in parts of the north slope, while in sporadic locations around Whitehorse it is only a few metres thick and is barely below 0° C.
The Yukon Permafrost Knowledge Network has been created to facilitate and encourage cooperative relationships between those active in permafrost related work and research activities.