I agree about the bows. I have actually caught spring run browns too, but not in the quantity as fall run rainbows. In the colorado river, browns don't start spawning until mid november and end in early january, but that is due to warmer water temps.SLAYERFISH said:There are some bo's around that spawn in the fall. The browns spawn in a shorter window than the bos also. Browns spawn pretty much in oct-dec. Bo's spawn from oct-june.