There are lots of trails in and around Charlotte.
Check out
www.tarheeltrailblazers.com for all the information you need.
Closest to you are Francis Beatty Park (Matthews), Sherman Branch (roughly Mint Hill), Anne Springs (Ft Mill).
There are also Renaissance (Charlotte), Catawba (aka the US National Whitewater Center -- West Charlotte), Poplar Tent (Concord), North Meck (Huntersville), Fisher Farm (Davidson), Lake Norman State Park (Troutman).
An hour east of you is Uwharrie.
Check the trail reviews on the Trailblazer site. There is also a trail map that will show you the locations of each trail.