Statewide
Proposition 134Male and Female Participation in School and Collegiate Sports
Sourced facts
Official ballot title
Shall there be a change to the Colorado Revised Statutes creating new law restricting participation in all K-12 and collegiate school sports based on the participant’s sex as determined by certain aspects of their biological reproductive system, and, in connection therewith, requiring a school, institution of higher education, or athletic association to designate each school or intramural athletic team or sport as male, female, or coeducational; only allowing participants to compete on the team or sport of their designated sex or to compete on a coeducational team; creating an exception to allow a female to participate on a male-designated team or sport if there is no female team available; prohibiting a government entity, licensing or accrediting organization, or athletic association from entertaining a complaint, opening an investigation, or taking other adverse action against a school for maintaining separate teams or sports for females; and providing the commissioner of education with the authority to enforce the proposed initiative for K-12 school districts?
Verbatim from: Amendments and Propositions on the 2026 Ballot (Colorado Secretary of State)
Summary
Requires K-12 and college teams to be designated male, female, or coeducational based on biological sex as defined in the measure, and requires schools to adopt sex-eligibility policies.
Plain-language summary written for this guide from the sources below.
What a YES vote does
A “yes” vote on Proposition 134 means that all school-based athletic teams and sports must be designated as being for biological males or biological females only, or as mixed, and requires schools and school districts to adopt policies on sex eligibility for sports.
What a NO vote does
A “no” vote on Proposition 134 means that individual schools, school districts, and athletic associations may continue to set their own policies in alignment with current state and federal law about who is eligible to participate on a team or in a sport.
Official text from the Blue Book (“What Your Vote Means”).
How it got on the ballot
- Citizen initiative petition #109. The Secretary of State found the petition sufficient on Mar 16, 2026. [Colorado Secretary of State: 2025–2026 initiative filings and petition status]
- Signatures: 168,579 submitted; verified by random sample. [Colorado Secretary of State: 2025–2026 initiative filings and petition status]
- Requirement: 124,238 valid signatures. Initiatives that amend the Colorado Constitution must also include signatures from at least 2% of registered voters in each state Senate district. [Colorado Secretary of State: 2025–2026 initiative filings and petition status]
- Certified to the ballot by the Secretary of State Sept 4, 2026. [SOS ballot certification news release, Sept 4, 2026]
Official fiscal information
- Increases Colorado Department of Education workload and legal costs by an indeterminate amount if remedial action is required.
- Higher education institutions and K-12 schools/districts will have costs to update policies; local costs are expected to be minimal.
From the official source’s fiscal section. Figures marked “(Estimated)” are estimates or projections in the source.