District 4 of the Wyoming State Forestry Division encompasses the five western counties of Lincoln, Sublette, Sweetwater, Teton, and Uinta. The District has two offices; one in Pinedale and one in Lyman.

The District is responsible for the management of forested state trust lands. These lands are primarily managed to generate revenue, via forest products sales, for public schools and other trust beneficiaries. Through proper silvicultural and best management practices the District promotes healthy forest systems to generate other non-monetary benefits as well. Wildlife habitat, domestic animal habitat, watershed protection, and the promotion of a viable and sustainable forest products industry are all key benefits gained through proactive forest management. Recreational opportunities such as hiking, fishing, and hunting are also promoted, though camping and fires are not permitted on State Trust Lands.