Fall is here and the nights are getting longer and cold: each day is 3 minutes shorter than the last. But this is a great time to get out on the trails! Mosquitoes are almost nonexistent and the trails are unusually dry. While most people think of fall foliage this time of year, we’re not done with wildflowers. Look at the banner above: asters and goldenrods of all types are still out, and some flowers, like lady’s thumb and cardinal flower, can still be found. For an easy, peaceful October woods walk where you might see some of these, try the Karl Mighton Trail off North Mill Street in east Hopkinton. The Rockwood Meadows Trail on School Street near the Upton line in west Hopkinton takes you by a pretty field that sports wildflowers common to meadows, on your way to Peppercorn Hill.