Colorado · Election Day, Tuesday November 3, 2026

Vote noon 109 and 110.

Two measures have qualified for Colorado’s ballot. One restricts participation in every K–12 and college sport by reproductive biology. The other bans gender‑affirming surgery for anyone under 18 and bars insurance from paying for it. Both take effect January 1, 2027.

75 days until the election

Read this before you look at your ballot

109 and 110 will not be the numbers on your ballot.

“#109” and “#110” are Title Board filing numbers — the numbers these measures carried through the petition process. The Secretary of State’s own qualification notices still call them “Proposed Initiative #109” and “Proposed Initiative #110” and give them no ballot designation at all.

Because both change the Colorado Revised Statutes, each will appear on your ballot under a different number, assigned when the Secretary of State certifies ballot order and content on September 7, 2026. In 2018, not one of the seven qualified initiatives kept its filing number.

We will put the real numbers here the day they are issued. Until then, know these measures by what they do, not by a number that is about to change.

There is a second reason to be careful with these two numbers: Colorado already voted on a Proposition 109 and a Proposition 110, in 2018. Both were transportation‑funding measures and both were defeated. Searching those numbers will find you the wrong thing.

What they actually say

Quoted from the filed text, not from either campaign.

Initiative #109

School sports

Official title, in part: “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.”

  • It defines sex by gamete production: “female” means a person whose biological reproductive system is organized around the production of ova; male, around the production of sperm.
  • The exclusion runs one way. A team designated for females “shall not be open to a male student or participant” — an absolute bar. A male‑designated team is closed to females only where a female team is available.
  • It reaches public, charter, private and denominational K‑12 schools and Colorado’s colleges and universities — but its only enforcement provision empowers the commissioner of education against K‑12 school districts, so it binds schools it cannot reach.
  • It forbids any government entity, licensing body or athletic association from even entertaining a complaint against a school that complies.
  • Its definitions are scoped to the new article — “as used in this article 60” — not to Colorado law generally.

Initiative #110

Surgery for people under 18

Official title, in part: “prohibiting surgery on a minor for the purpose of altering the minor’s biological sex characteristics.”

  • It defines the ban by purpose, not procedure: “altering biological sex characteristics” means “treatment in response to a minor’s perception of sex or gender.” The same operation is lawful or unlawful depending on why it is done.
  • Its funding ban reaches private insurance, not only public money: “no state or federal funds, Medicaid reimbursements, or insurance coverage.”
  • It applies to everyone under eighteen, and the phrase “parental consent” appears nowhere in it.
  • It binds far more than surgeons — “a health‑care professional or other person” — where health‑care professional is defined to include psychiatry, psychology, mental health therapy, pharmacy and “other healing arts.”

Both take effect January 1, 2027 if passed. Colorado’s nonpartisan Legislative Council Staff scored both at zero fiscal impact — no state revenue, no state expenditure, no change to TABOR refunds.

What it takes to stop them

A simple majority. That is all either one needs.

Both measures are statutory rather than constitutional, so neither faces the 55‑percent bar that Colorado sets for constitutional amendments. Each passes on a simple majority of the votes cast on it. That makes them easier to pass than most measures people worry about — which is the case for turning out, not for reassurance.

They are on the ballot on strength of signatures, not of a count. Proponents submitted 168,579 for #109 and 164,922 for #110 against a requirement of 124,238, and the state never counted them line by line — it sampled five percent and projected. No valid‑signature count exists for either measure.

And nobody knows how many students this touches. Asked in February 2026 how many transgender athletes compete in its sanctioned events, the Colorado High School Activities Association answered: “Due to privacy laws, this information is neither shared with or received by CHSAA.”

More is coming

We will write when there is something worth your attention.

This site is one page today. Next: the ballot numbers when they issue on September 7, the Blue Book analysis when it lands, and a plain reading of each measure section by section.

Your address is stored on our own server and used for nothing but these updates. This page loads no trackers, no analytics and no third‑party scripts — open your network tab and check. We do not log your IP address with your signup.

You do not have to wait for us

There is already a campaign, and it is further along.

Families Not Politics is the registered issue committee opposing both measures — filed with the Colorado Secretary of State on February 10, 2026 and led by One Colorado. If you want to volunteer, donate or organise today, they are who to go to.

One Colorado · ACLU of Colorado

Check us

Every claim above, at its source.

We quote the filed text and the state’s own records. Where we could not verify something, we left it out — including several things an opposition page would normally say.

  1. Initiative #109, final filed text — Colorado Secretary of State
  2. Initiative #110, final filed text — Colorado Secretary of State
  3. Title Board titles — #109 · #110
  4. Qualification announcements — March 16, 2026 · March 17, 2026
  5. Fiscal impact statements — Colorado Legislative Council Staff
  6. 2026 election calendar — Colorado Secretary of State
  7. Registration, ballots and deadlines — GoVoteColorado.gov