The spawn will be over by that time frame, but there should be plenty of eggs in the water...I've said it a few times before, but your best bet for a big brown is to know where they are, get there before daybreak or stay after dark, sneak up, use something big enough to interest a big brown trout, and make your first cast count. If you dont get a take in a couple casts...Move on. Look & hike more than you fish and you will do well. Make a mental note if you find a good one, and come back and try them again if you blank the first time. Good Luck.