Ghost Falls Trail sounds like a pretty amazing hike. It has some really great parts and some not so great parts as well. Lets start with the good parts. It is close to the Salt Lake Valley if you are around Salt Lake. At the top there is a vault toilet and benches to take a break and eat. There is a lot of wildlife, I saw a deer, squirrels, and a lizard. It is not difficult. Elevation gain is under 1000 feet. Last there are beautiful views of the South part of the Salt Lake Valley, with the Draper Temple and Oquirrh Mountains.
The bad… Narrow trails, which is not that bad, but most of the people using the trail are mountain bikers, and there is not room for the two, so someone has to find an area to step out of the way. There are many forks in the trail, so it is confusing on your first time hiking the area. The waterfall has poison ivy around the area so you cannot get too close to the waterfall. Last, there is a lot of construction around the area and many trails are closed.
Lets start with the trail head. The actual trail head starts at the end of the hike, which is the top area at the Jacobs Ladder Trail head. When I went this was inaccessible because of construction. If this was accessible the round trip of the hike would have been less than one mile. Currently the best trail head is the Carolina Hills Trail head. This trail head starts in a subdivision at a cul-de-sac, and there are only about 3 parking spots. If you are able to obtain a parking spot your round trip to Ghost Falls is about 3 miles. The most realistic trail head is at the Andy Ballard Arena.
From the Carolina Hills Trail head head East on the Equestrian trail, until it becomes the Aqueduct Trail, keep heading East following the Gasline Trail, the Gasline Trail will then become the Ghost Falls Trail. Round trip from here is 3.5 miles to Ghost Falls.
Head East and cross Highland Dr, and you will see the trail. It starts with the Equestrian Trail, stay on the Equestrian Trail, until it becomes the Aqueduct Trail, keep heading East following the Gasline Trail, the Gasline Trail will then become the Ghost Falls Trail. Round trip to Ghost Falls from here is 4.5 miles.