C.R.S. § 37-48-177

Whenever in this article an election of the electors of the district or a subdistrict therein is permitted or required, the election may be held separately at a special election or may be held concurrently with any primary or general election held under the laws of this state; but no election shall be held at the same time as any regular election of any city, town, or school district if any part of the area thereof is located within the boundaries of the district or subdistrict, as the case may be.