Advance Colorado

Advance Colorado is a 501(c)(4) conservative advocacy nonprofit based in Colorado. Widely described by media outlets as a "dark money" organization because it does not disclose its donors, the group states its mission is to push back against progressive policies and advocate for fiscal responsibility, free enterprise, and public safety. The organization is led by President Michael Fields and Executive Vice President Kristi Burton Brown, a former chairwoman of the Colorado Republican Party.

The organization is the primary backer and support committee behind two 2026 ballot initiatives: Measure A81, which addresses law enforcement communication with federal immigration authorities, and Measure A82, which would establish a constitutional right to purchase and sell natural gas. Advance Colorado frequently uses the citizen initiative process to advance its policy goals, reportedly sponsoring over half of the statewide measures on the 2026 Colorado ballot.

Advance Colorado has been a major financial and organizational force in recent state elections. In 2023, the group led the successful campaign to defeat Proposition HH, a property tax measure, and subsequently negotiated with state lawmakers during a special legislative session to pass a $1.6 billion property tax cut. In 2026, alongside Measures A81 and A82, the organization backed several other initiatives, including Proposition 136, which would cap the state income tax rate at 4.4 percent, and Proposition 132, which seeks to increase penalties for fentanyl possession and distribution.