Since 1948, Western Weekend has marked the unofficial start of summer in West Marin. The event commemorates the area’s agricultural heritage with a series of time-honored traditions: the West Marin 4-H Fair, a barn dance, the Farm Bureau Chicken Barbecue, and the Rotary Club’s Chili Cook-off. The celebration culminates in a Sunday parade featuring a procession of floats, dance teams, bagpipes, a mounted posse and vehicles that make their way down main street in Point…