Two consecutive summers, I used the chain to test my speed and endurance on a long paddle in the GII. Each time I paddled a measured, 8 mile course in 2 hours 45 minutes at my "leisurley" paddling rate - it works out to 3 mph. This is dead, flatwater - no current and usually no wind. I was paddling the GII empty, just me, a dump bag and some weight in the bow to hold it down.
The second summer I also did 25 miles in one day. That was the limit of my endurance, I was very tired by the end. At 20 miles, I was doing fine, but the last 5 miles drained me.
