This week

Adopt-A-Stream Training, Gainesville. Workshop on how to accurately monitor streams. Friday, Elachee Nature Science Center, 2125 Elachee Drive, Gainesville. $5. Preregistration required; age 18 and younger must be accompanied by an adult. 770-535-1976.

Atlanta Susan G. Komen 3-Day Walk, Buford. Participation closed; open to spectators. Begins Friday at Lake Lanier Islands, 7000 Holiday Road, Buford. Free.

Organic Gardening, Cumming. Forsyth County Master Gardeners with Dennis Whittle. Saturday, Forsyth County Public Library, 585 Dahlonega Road, Cumming. Free.

Ride for Good News at Noon, Gainesville. Chicken City Cyclists. 8:30 a.m. Saturday, Riverbend Church, 1715 Cleveland Highway NE, Gainesville. 770-534-1078.

Safe Boating Course, Flowery Branch. Learn how to safely operate your vessel and navigate waterways. 8:30 a.m. to 4 p.m. Saturday, Coast Guard Auxiliary Operations Center, 6595 Lights Ferry Road, Flowery Branch. $35. 770-271-4059 or auxiliaryclass@bellsouth.net.

Boo Run 2009, Flowery Branch. 5K. 9 a.m. Saturday, Old Train Depot, 5600 Main St., Flowery Branch. Registration $25. 678-316-6780.  

Upcoming

Race Against Domestic Violence, Dahlonega. 5K. Benefits No One Alone. Run/walk at 9 a.m. Nov. 7, Cottrell Cattle Ranch, 170 Garnet School Road, Dahlonega. Preregistration before Saturday, $20; day of event registration, $25; $15 students. 706-864-1306, ext. 6.

Ongoing

Chicken City Cyclists evening ride, Gainesville. 6 p.m. Wednesdays, downtown Gainesville square. 770-534-7075 or unnoldl@charter.net.

ISI Cycling ride, Gainesville. Three group rides with varying speeds and distances. No ride if in rain or if temperature is below 32 F. 7:15 a.m. Saturdays, Corinth Baptist Church, 3590 Thompson Bridge Road, Gainesville. Free. 678-231-0417.

Hall County Farmers Market, Gainesville. 6 a.m. Tuesdays and 7 a.m. Saturdays, corner of East Crescent Drive and Jesse Jewell Parkway, near U.S. 985 Exit 24, Gainesville. $10 to join market, $5 per day to sell. 770-531-6988.

Hoschton Farmers Market, Hoschton. 8 a.m. to 2 p.m. Saturdays, Towne Center Shopping Center, Hoschton. Dan Graves, 770-861-7232.

Dahlonega Farmers Market, Dahlonega. 7 a.m.-3 p.m. Tuesdays and Saturdays through Nov. 7, Hancock Park off the downtown Dahlonega square. 706-864-6133.