Colorado Voters Passed Proposition 134 on School Sports
The new law mandates that student athletic teams in Colorado be based on biological sex.
Updated on Sept. 28, 2026 in Secondary Education
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Colorado voters passed Proposition 134, a measure requiring that K-12 and collegiate athletic participation be based on sex determined by biological reproductive systems. The initiative mandates that schools categorize all teams as male, female, or coeducational.
Why it matters
This change alters how school districts and universities organize sports programs and team eligibility across the state. It establishes new requirements for team designation to ensure compliance with state-mandated biological sex criteria.
Proposition 134 requires schools to designate teams as male, female, or coeducational. The commissioner of education is granted authority to enforce these requirements for K-12 districts.
The players
Commissioner of Education
The state official who holds the designated authority to enforce the provisions of Proposition 134 for K-12 school districts.
The details
Under the new mandate, participants are limited to teams that align with their sex determined by biological reproductive systems or to coeducational squads. If a female team is not available for a specific sport, females are permitted to compete on male teams. Government bodies and athletic organizations are now prohibited from penalizing schools for maintaining these sex-separated team structures.
Timeline
September 28, 2026: Proposition 134 passed via ballot vote.
The Home Front
This mandate alters the regulatory landscape for scholastic sports in Colorado, marking a shift in how institutions manage team eligibility requirements. It updates the governance of school athletics relative to the standards historically set by the Title IX of the Education Amendments of 1972.
Families with student-athletes should review upcoming school sports handbooks to see how team designations may change under the new state policy. Parents can monitor communications from their local school district office for updates regarding team restructuring and eligibility requirements.
The takeaway
Proposition 134 establishes new state requirements for sex-separated sports teams in Colorado schools. Families should watch for specific guidance from their local district administration as schools begin the transition process to comply with the new designation mandates.
Further reading
For additional context on local school policies, visit Secondary Education.
Live Poll
Do you support policies that restrict school sports team participation based on biological sex?
