Is it 4 miles out then 4 miles back? Want to go tomorrow, but it is going to be very cold. Not sure we can of it is actually 8 miles.

No. It's 2 miles out and 2 miles back.

2 miles each way. Should be very pretty in winter when its frozen. If its not frozen it can be quite cool from the mist of the falls so dress accordingly. Also rocks can be slippery so sturdy shoes would be beneficial.

Four miles total.