You're lookin' at just under 300 lbs. for the boat alone (my Fish-Rite specs indicate 285 lbs. for a 16X54 Guide Model)--not considering the added weight of seats, anchors, oars, gear, etc. Trailer? You're guess is as good as mine, but, depending on the make, I'm guessing at least another 300 lbs.
I'm not even going to ask why you need to know!

Just remember, lift with your knees. :grin: