i looked at it and think i could get it out of there pretty easily. where the top would end up is anybody's guess. a little limbing of what can be reached, then cut the stem as far out as possible from the down river side. that top will swing the stem around the rock. then cut up what is left.
there is a big cottonwood crosswise spanning about 65% of the river just below the put in, but a right side line will clear that. i did not look further downstream than the spruce, i did not have the time.