Likely too low for decent whitewater on most of run. (Only 'fish flow' of ~50 cfs.)
Just after the ledge some large wave holes form at 1800+ cfs. There is large rock pour-over just off the left bank, and just to the right of it is where the wave-hole forms. The pour over offers eddy access to this rodeo hole. The gradient eases and most of the water makes its way over to the right bank, as do most boaters. The gradient builds through some waves that offer play spots and a number of eddies down the right shore. One small ledge/pour-over forms in the middle, but is easily missed by following the wave trains down the right side. A short slack-water breaks up the top of Mark Falls from the middle of Mark Falls. The bottom section contains fewer waves and eddies but more holes and pour-overs, so keep you guard up! The holes did not washout from 1500 cfs all the way to 4000 cfs -- things just got bigger. There is one more slackwater before a runout section with most boaters getting back to the left side of the river. This portion ends with boaters ferrying across the outwash from the Powerhouse to the takeout on river-left.