Colorado Revised Statutes Title 33. Parks and Wildlife § 33-14-110. Snowmobile operation on roadway of streets, roads, and highways

(a) To cross a street or highway in the manner provided in section 33-14-112;

(b) To traverse a bridge or culvert on such street or highway;

(c) During special snowmobile events lawfully conducted pursuant to the authority granted to local subdivisions in this article;

(d) During emergency conditions declared by proper state authority;

(e) On the roadway of streets and highways which are not maintained for winter motor vehicle traffic;

(f) When local subdivisions have authorized by ordinance or resolution the establishment of snowmobile routes to permit the operation of snowmobiles on city streets or county roads. No street or road which is part of the state highway system may be so designated.

(g) When crossing railroad tracks.