Colorado constitution
Article XXI
Section 2

When such petition is sufficient, the officer with whom such recall petition was filed, shall forthwith submit said petition, together with a certificate of its sufficiency to the governor, who shall thereupon order and fix the date for holding the election not less than thirty days nor more than sixty days from the date of submission of said petition; provided, if a general election is to be held within ninety days after the date of submission of said petition, the recall election shall be held as part of said general election.