How long does it take to hike on loop trail?

It took my family 3.5 hours. It's the stairs that get you. They are steep , rocky and plentiful. Unless you've been working out alot , you have to take a lot of stops . Bring water !!

It is 4.5 miles, and considered strenuous (if going over the top), and for some the stair climb from the Falls up is, too. Time depends on your speed and how much you stop. 3 to 4 hours is good, allowing for sight seeing, etc. A map is at https://files.nc.gov/ncparks/maps-and-brochures/stone-mountain-park-map.pdf , as well as, one at the hiking project with elevation information https://www.hikingproject.com/trail/7022396

We did all in about 5 hours with a 4 year old

It's 4.5 miles