Run or powerwalk if you want to go aerobic.
Stroll if you wish.
Stop to picnic, shop, or sightsee if you want.
Just be sure you can complete the trail by the official finish time - which is usually either dark or when the starting point closes for the day.
How long does it take to complete a 10 kilometer trail? At a very easy pace, it takes most people 2 hours. If you are a power walker, you will finish in an hour and a half or less. More difficult trails take longer.
