Take an easy 2 or 4 mile walk at Herrick Lake Forest Preserve .
Use the Herrick Road entrance, not the Butterfield Road one. Meet at 11:00am in the parking lot off Herrick Rd. at the map display board on the left side of the parking lot (while facing the forest).
At the first intersection on the trail, return to the parking lot on a different path (for a total distance of two miles) or continue on an additional two mile loop. Flat limestone trails. Leisurely pace (2.5 mph or so). Leashed dogs welcome. Cancelled if it's raining. Get a map of the trails (http://www.dupageforest.org/Herrick_Lake_Map.aspx).
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Interested in other Hiking Meetups? Try these, but note that some of these folks are "serious" hikers taking hikes of 5+ miles or more, and covering ground at 3-4 miles per hour or faster.