Hunting season. Be careful when you are running or hiking in trails that allow or are near land that allows hunting. NH Fish & Game hunting season details are in the link below. Depending on where you live, you are likely in WMU: K, H2N or H2S. Regardless, don’t wear white. Wear something bright neon orange, yellow, or pink.
Hunting seasons in NH: https://wildlife.state.nh.us/hunting/hunt-dates.html
How runners should dress for hunting safety: https://www.runnersworld.com/training/a20818629/how-to-run-safer-during-hunting-season/