When were ten gray wolves reintroduced to Colorado's Summit and Grand Counties?

December 2023

The specific reintroduction event for Colorado, directed by the passage of Proposition 114 in November 2020, saw the physical introduction of ten wolves into Summit and Grand Counties occurring in December 2023. This date marks the beginning of the state's active management and monitoring program for the newly established population west of the Continental Divide. The subsequent estimate of 29 wolves by January 2025 reflects the growth after this initial introduction phase. The date November 2020 is significant as it marks when the proposition was passed, not the physical reintroduction itself, and January 2025 represents a later population snapshot, not the introduction timing.