Challenges 88, 161, and 131

I went to the Old Salmon River Trail (and "new" Salmon River Trail) today and did these:

Challenge 88: walked 2.1 miles new to me on natural terrain while on the trail

Challenge 131: stacked 21 stones

Challenge 161: waved to 39 strangers and smiled (I didn't get a video because I didn't want to encroach on their privacy outside, my brother can confirm this though so here's him waving back at me)