moucheur, I live a short distance from the "Big Presque Isle" stream where it enters the Saint John river. I fish at that spot in the spring as there is a good number of rainbow trout and a few 2lb brook trout hanging around. I have fished upstream but not far; maybe 5 miles or so. The "little Presque Isle" stream is the back line of my property; much smaller with brook trout up to 12".
Both streams are named for Presque Isle Maine as far as I know. Interesting that the maps are using the local pronunciation!