Events                        Get to know the Estuary through the seasons. Click on "Woods Year" to see things you might find.  End of Summer Woods Walk.  9 a.m., Monday, September 6. See the first fall colors.  Meet at the Estuary Center to carpool to the Weir River Woods.   Estuary Center Green Open House. 10 a.m. - 4 p.m., Saturday, October 3.  333 George Washington Boulevard. Learn about the Skystream wind turbine, rain garden for filtering run-off, 3 different brands of solar hot air collectors, temperature and weather monitoring, Velux Daylight Tubes, soy-based foam insulation, concrete siding, high-efficiency toilet, and recycled construction materials.  Part of the Northeast Sustainable Energy Association tour. www.nesea.org   Fall Color Woods and Salt Marsh Walk. 9 a.m., Saturay, October 16. Enjoy the colors of red maple, blueberry, and glasswort. Meet at the Estuary Center to carpool to the Weir River Woods.   Beach Ave. House Tour. 4-6 p.m. followed by refreshments and raffle, Sunday, October 17.  Call Pam Coffman at 781-925-0694 for info.   Hulloween.  Saturday evening, October 30 at the Red Parrott.  Two bands.  Call Scott Plympton and Judy Dorner, 781-925-4823, for info.   Fall Leaves Woods Walk.  9 a.m., Saturday, Nov. 7.  Collect red maple leaves and enjoy the fall woods and marsh. Meet at the Estuary Center to carpool to the Weir River Woods.   Late Fall Woods Walk.  9 a.m., Saturday, December 4.  See holly in its Woods setting.  Meet at the Estuary Center to carpool.   Walks are adapted to visitors.  Allow up to two hours for your walk.   The Weir River Estuary Center, 333 George Washington Boulevard next to Gosnold Street in Hull, is now open for use!  This town-owned building is leased by the Weir River Watershed Association.  It has been renovated as a "green" building by the WRWA, its partners, the Surfrider Foundation and Hull Performing Arts, and many volunteers.  To find out more, go to www.weirriver.org