So your answer is no there is no time limit but, there are many many many lakes and swa's that do not allow bows or archery so if you dont have a regulations guide pick one up or download it here http://wildlife.state.co.us/Brochures/pdf/fishing.pdf note:this will change jan 1 20064. UNDERWATER SPEARFISHING, ARCHERY AND GIGS:
(a) Underwater spearfishing, archery and gigs are permitted for taking carp, gizzard shad and
white or longnose suckers unless otherwise stated in the ?Alphabetical List of Waters &
Properties? of this brochure. Other game fish can be taken only when authorized in specific
waters listed in ?Alphabetical List of Waters & Properties? of this brochure. Lake trout cannot
be taken by underwater spearfishing.