//
The mountains and canyons around San Gil make this a great area for mountain biking. You can find bikes for hire in town, but for a guided tour ask at Gringo Mikes. They run full-day tours under the name Colombian Bike Junkies including new full suspension Kona bikes and protective equipment, 4WD transfers, breakfast, lunch and drinks and snacks along the way. You get to see some great scenery, and best of all it's about 95% downhill so you can let gravity do most of the work. You don't need to be a downhill guru, but should be comfortable with riding on dirt roads. COP$160,000-180,000 (depending on group size).
Pleasant park for a stroll. Also has a swimming pool or you can dip in the Rio Fonce.
Beautiful 180-meter-high waterfalls outside of town. To get there, get a bus to Charalá from the local terminal and ask to be dropped off at Las Cascadas (COP$5,000, 40 min). There are two entrance on the right handside of the road, the second one (blue and yellow sign) offers a more scenic walk along the river and you'll get to see more waterfalls (COP$7,000). It's a nice 20-minute walk to the bottom of the Juan Curi waterfall where you can swim. Your shoes will get wet crossing the water several times and there are ladders and ropes to help you climb. 100 meters before the waterfall, a small track on your right will lead you up to the middle of the waterfall. Rappelling is possible from there. During rainy weather, consider going early and/or enquire by phone on the flood risk as there may be too much water to walk up the trails to the pools.