Lower Das Boot to the Subway- Wasn't flowing until about halfway through Das Boot. Water was clear after that. Hot day (reported to be a high of 88), but pleasant hiking weather. 2 of 3 of us wore dry suits with fleece and were comfortable. We probably would've been okay with our 3/4 wet suits. the other wore a long 3/4 wet suit on top of a shorty and didn't seem to get too cold but kept moving and went ahead to sit in the sun.