Park your car at Simi Winery on the north side of town in Healdsburg. Pedal on up to Mazzocco Winery on Lytton Springs Road, then on to Mauritson where Lytton Springs meets Dry Creek Road. Head on over to Wilson Winery for some nice Dry Creek Zinfandel, then back to home base. There's a few inclines on this 8 mile loop, so save some energy to make it back to Simi Winery by 5:00PM to take advantage of Visa Signature benefits, offered at all four wineries on the circle. Also on the north side of Healdsburg is the Grape Leaf Inn Bed & Breakfast, featuring a hearty breakfast and evening wine tastings. See the details of each stop for information on hours of operation and whether you'll need an appointment or not.