Just go!
http://www.exploregeorgia.org/blog/get-outdoors-in-augusta
http://www.traillink.com/city/north-augusta-sc-trails.aspx
http://www.fleetfeetaugusta.com/resources/places-to-run-and-swim-in-augusta
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Hiking:
https://www.trails.com/activity.aspx?area=10983
https://www.bringfido.com/attraction/trails/city/augusta_ga_us/

Biking:
https://www.singletracks.com/Georgia-bike-trails_10.html?filterBy=%7Cloc:33.470833~-81.975000~25~Augusta%2C+GA

Running:
http://www.fleetfeetaugusta.com/races
​http://www.active.com/augusta-ga/running/5k 

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