One of the nice thing about a GPS is it gives you data.  Here are some examples.  The 164 rod from Crooked to Argo took us 150 minutes.  This was our first day out, the third portage of the day, and we were exhausted.  There were four of us, 2 men and 2 women, out-of-shape, and two of us with bad knees.  A group passed us on that portage (3 people in one canoe) and they easily did the portage in half the time. We were double portaging and our canoes were an 18' aluminum battleship and an 18 kevlar.  The next day, we did the 126 rod portage from argo to darky in 80 minutes.