The ACGMC annual Rock Sale & Swap will be held on Saturday, June 15th. Time: 10am to 2pm. Where: United Methodist Church, The location is the church PARKING LOT, 16 2nd Avenue SE, Osseo, MN Free and open to the public. Come early. This is a really cool POP-UP SALE.---4 hours and it's GONE. Lots of rock treasures and surprises.