Public invited to comment on draft rule and DEIS for proposed Colorado gray wolf experimental population designation 

As the result of a statewide voter-led initiative passed in November 2020, the U.S. Fish and Wildlife Service is proposing a rule to establish an experimental population of gray wolves in Colorado under section 10(j) of the Endangered Species Act (ESA) in support of the state of Colorado’s voter-mandated gray wolf reintroduction program. The proposed rule is now available for public review and is intended to accommodate the state of Colorado’s gray wolf reintroduction planned for late 2023.   

Colorado Parks and Wildlife (CPW) intends to reintroduce the gray wolf in a portion of the species’ historical range in Colorado no later than December 31, 2023. CPW requested the designation of an experimental population under section 10(j) of the ESA to provide the state with increased flexibility to manage wolves once reintroduced in Colorado. Learn more about 10(j) rules here.

The proposed rule and draft environmental impact statement published in the Federal Register on Friday, February 17, 2023, opening a 60-day public comment period through April 18, 2023. During this time, the Service will seek public input and coordination with the state, Tribes and local partners.

Submit Comment

Comments on the proposed rule and DEIS may be submitted through April 18, 2023 at:, Docket No. FWS-R6-ES-2022-0100.

Public Information Meetings

  • Grand Junction Convention Center (Grand Junction, CO) on March 14, 2023, at 5:30 p.m. 

  • Moffat County Pavilion (Craig, CO) on March 15, 2023, at 5:30 p.m. 

  • Wattenberg Center (Walden, CO) on March 16, 2023, at 5:30 p.m. 

  • Virtual public meeting on March 22, 2023, at 5:30 p.m. (register here)

  • Denver Marriott West (Golden, CO) on March 28, 2023, at 5:30 p.m.


The gray wolf, being a keystone predator, is an integral component of the ecosystems to which it typically belongs. The wide range of habitats in which wolves can thrive reflects their adaptability as a species, and includes temperate forests, mountains, tundra, taiga, and grasslands. Gray...

FWS Focus
Section 10(j) of the Endangered Species Act

This document provides answers to frequently asked questions regarding section 10(j) of the Endangered Species Act and experimental populations.