This is what I know: Hanging Spear Falls is on the Opalescent River which starts near Mount Marcy. Feldspar Brook and Lake Colden empty into the Opalescent River before the falls. The river eventually empties into the Hudson River. Hanging Spear is .5 miles south of the outlet of the Flowed Lands there is a marked trail that parallels the river I would estimate the fall to be 80 to 100 feet, but the total cascade and fall is quite long as you can see in the picture. There is a carn that marks the trail to the two observation point of the falls. It looked as if you could get to the bottom of the falls by a narrow trail from the 2nd location but the weather was too wet for us to attempt.
What I found on how it was named is this:
1. With the correct water flow the falls looks like a spear hanging in mid air
2 the rocks around it looks like a spear head
The top of the cascade

it's all down hill from here
The cascade and falls in full

The main fall

Top of the fall

Base of the falls

another shot of the main fall

It was a great day for taking pictures, overcast and a misty rain. We had a five mile hike into this waterfall and with a foot bridge out we couldn’t make a loop out of this hike so we returned on the same trail. All pictures were shot with no filters and just a touch of post processing (might better say none at all) elements 6 used to resize pictures.