The gauge limits are a rough guess, based on historical streamflows. If you have good beta on runnable levels, please add a comment.
There is access on river left at the Hudson Point Nature Preserve, but the climb out to the parking lot would be long and steep. Instead, use the nature preserve as a quick stop to explore. The preserve can be located on river left by some steps leading down to the water where the river narrows again. (43.279352N,73.697501W) This would be about 1 1/4 miles downstream of the spillway.