When the lake is normal its less than 6 inches deep in channel up past bear creek, river actually dumps in on far west bank, most maps you look at show it coming in above bear creek, main part of whats left of chanel dumps into lake (flats) about even with bear creek, would be very hard to get north of there unless its up like it is now but even if you do theres only a few spots that wouldnt require an airboat or jet drive,, we even tried the big mud buddys and they wont go through the silt flats like they show on their comercials.. Its up a few feet now and would be the best time to try to make it up there, but be very careful when going north of coon creek area there are alot of large submerged logs up there in the silt, Hope this helps you bud message me if you need any more specifics.