Originally Posted by Ture
Carry 2. The short one (20-25') is the one you use on the river, the one your passenger jumps to shore with to hold the boat.
The long one (who knows) is for when you get to camp and want to tie up to the tamarisk that is 80 ft. away...
That's what I do too. I have a really short line (15-20 feet?) tied to the front of the boat that I braid for storage and clip to a d-ring with a locking caribiner. The short one comes in handy more often than the longer one. I use it several times a day usually, and on day trips. The longer one (75' in my case) only comes out of the throw bag when I can't find something close to shore to tie to otherwise and when the boat needs to be tied up for extended periods (ie, overnight).
I may actually get a third and tie it to the back of the boat and have it a bit longer than my current short one. There have been times where the short one is just a few feet or so shy of working, so I end up taking out the 75' rope, which is way too much and is more trouble than it's worth. I'd like to get something in the 35' range or so (maybe twicce what my current short line is?). Then if there is plenty to tie to close to shore, I pull in nose first and use the short line. If things are set back a bit, I back in and tie off using the medium length. If there's nothing even remotely close, I string out the 75' rrope from the bag...