About the commemoration
What is the Colorado 250-150 Commemoration?
Say it because you can: Semiquincentennial. Sesquicentennial. Sesquisemiquincentennial.
In 2026, Colorado will observe two significant anniversaries: the signing of the Declaration of Independence–our semiquincentennial–and Colorado’s entrance into the Union–our sesquicentennial. We invite you to take part in this unique moment–our “Sesquisemiquincentennial”–as we commemorate Colorado’s shared history and highlight our place in the larger national story.
As we create opportunities to commemorate and celebrate Colorado’s stories, the America 250 - Colorado 150 Commission is committed to recognizing that our shared history includes the experiences of all who have called Colorado home. 2026 will be an opportunity for us to come together as we celebrate Colorado by acknowledging our complete shared history, honor what makes Colorado unique, and recognize our shared destiny as we strive toward a more perfect union.
Land Acknowledgement: We acknowledge that the land currently known as Colorado has been the traditional homelands of Indigenous peoples since time immemorial.
Signature Initiatives
The America 250 - Colorado 150 Commission will create opportunities for everyone in Colorado to participate in the Sesquisemiquincentennial through a variety of signature initiatives. These will engage Coloradans in every area in our state by creating memorable public experiences, commemorating our shared history, and supporting Colorado communities.
Our signature initiatives consist of a wide array of projects ranging from family activities, programs for historic preservation, opportunities for new education, and many more. As the America 250 - Colorado 150 Commission develops these programs in more detail, information will be shared here.
These signature initiatives provide opportunities for every Coloradan to participate in the 2026 commemoration, and are funded in part by our generous donors. Contact Commission staff at katie.roach@state.co.us to learn more about corporate sponsorship opportunities.
America 250 - Colorado 150 Newsletter
America at 250
America250 is a nonpartisan initiative working to engage every American in commemorating the 250th anniversary of the founding of the United States. This multi-year effort is an opportunity to pause and reflect on our nation’s past, honor the contributions of all Americans, and look ahead toward the future we want to create for the next generation and beyond.
Founding Legislation
The America 250 - Colorado 150 Commission is charged with guiding Colorado’s Sesquisemiquincentennial program in ways that empower every Coloradan to participate. The Commission consists of 15 members who represent Colorado’s diverse communities and several state agencies. It works closely with members of an Advisory Panel representing communities throughout the state. The Commission was created by the Colorado General Assembly with the support of Governor Jared Polis and is housed within History Colorado.
As we create opportunities to commemorate and celebrate Colorado’s stories, the America 250 - Colorado 150 Commission is committed to recognizing that our shared history includes the experiences of all who have called Colorado home, and that Colorado’s story does not end at our state borders but is part of the broader American story. Colorado’s Sesquisemiquincentennial in 2026 will be an opportunity for every Coloradan to come together as we:
The America 250 - Colorado 150 Commission is committed to celebrating Colorado by acknowledging our complete history, honoring what makes Colorado unique, and recognizing our shared destiny as we strive toward a more perfect union.
Commissioners
Advisory Panel
The America 250 - Colorado 150 Advisory Panel is a geographically-diverse committee of individuals that inform the Commission and lead Local Organizing Committees. You can learn more about your Local Organizing Committee.
in the News
- 29 Jan 2024Longmont Leader
- 03 Dec 2023New York Times
- 30 Jul 2023The Journal
- 01 Mar 2023Colorado Politics
- 04 Jan 2023Westword
Commission Staff
The America 250 - Colorado 150 Commission is supported by Program Director Katie Roach and a dedicated team of volunteers and interns.
Get in touch by emailing katie.roach@state.co.us, or send a letter to:
America 250 - Colorado 150 Commission
History Colorado
1200 Broadway
Denver, CO 80203
Commission meetings
Members of the public are welcome to attend Commission meetings.