there are no restrictions on shooting on the colorado river specifically. there are general regulations that state distance from roads and occupied dwellings. but, to my knowledge there are no restrictions for any distance to other boaters, safe shooting always applies, but just because there is a boat 50 yards behind me does not mean that i cannot shoot the ducks in front of me.There's certainly no shooting from your boat up here. Way too much traffic on the water, even this time of year.
I thought I heard a BLM ranger say the legal distance is 100yds a few years ago.
I know for sure that on the Cache la Poudre you can't shoot within a quarter mile from the river.
Pretty easy to just ask about it whenever/wherever you get your tags.