Let's take a bike ride down the Iron Horse trail to the Farmers Market in Danville. Iron Horse trail is walking/bicycling path. It has nice scenery. It's approximately 17 miles round trip. The trail is flat. This is a no drop ride so well go at the pace of the slowest person and stop as needed. Bring something to put the items you buy in (back pack, basket, ect).
Here's a link to the Iron Horse trail: http://www.ebparks.org/parks/trails/iron_horse
Here's the link to the Farmers Market: http://www.pcfma.com/m/market_home.php?market_id=4