Feb. 5: The Sierra Club meeting will feature Rebekah Walker Szivak and Kim Counts of the S.C. Department of Natural Resources speaking on "Stormwater Management: Raingardens and Other Landscaping Techniques." 7 p.m. at Baruch Auditorium, 284 Calhoun St., Charleston. Free.

Feb. 7: Seventh Save the Light Half-Marathon and 5K. 8:30 a.m. Folly Beach. www.actioncarolina.com.

Feb. 7: Fourth Winter Challenge Off-Road Triathlon. 10:30 a.m. Springfield (near Orangeburg) 7-mile trail run, 10-mile bike, 6-mile kayak. Chris Williams, 803-823-2044 or chris@winterchallenge.com. www.winterchallenge.com.

Feb. 7: Carolina Youth Development Center's second annual "Shuckin' for Shelter" Oyster Roast. 5:30-8:30 p.m. Goldbug Island. Includes Sticky Fingers barbecue and live music from Stoneking. $30 per person or $50 per couple. www.cydc.org.

Feb. 7: Francis Marion National Forest and Palmetto Pride Cleanup Day. 8 a.m. Meet at Sewee Visitor and Environmental Education Center, 5821 U.S. Highway 17. Volunteers needed. 877-725-7733.

Feb. 7: Seventh Hilton Head Island Half-Marathon, 10K and 5K. 8 a.m. www.bearfootsports.com.

FEB 7: U.S. Tennis Association USA Tennis Free for All. 10-11 a.m. Mount Pleasant Tennis Complex. Free event. www.townofmountpleasant.com. 856-2162.

Feb. 7: Guided Birding Trip to Bull's Island. 8 a.m. Meeting at Garris Landing, Awendaw. Ferry departs at 8:30 a.m. Naturalist will focus on migratory waterfowl and shore birds. Minimum of 12 and maximum of 43. $30 per person. Registration required at Coastal Expeditions, 884-7684. www.coastalexpeditions.com.

Feb. 7: Dynamic Mushroom Workshop. 9-11 a.m. 101 Duckett Hall Biology Auditorium, The Citadel. Free. Tradd Cotter, owner of Mushroom Mountain and project manager for Earth Design Environmental Landscape Architecture, talks about the benefits of native fungi in your garden and how to create high-energy compost to increase planting yields. www.mushroommountain.com.

FEB. 11: PADI Discover Scuba Diving. 6-10 p.m. R.L. Jones Center Pool. $45/resident, $52/nonresidents. Ages 10 and up. Contact Jeff Garrard at 884-2528 or visit www.townofmountpleasant.com.

Feb. 13-16: 12th annual Great Backyard Bird Count. www.bird count.org or contact Ann Shahid at 462-2150 or ashahid@audubon.org.

Feb. 13-15: Southeastern Wildlife Exposition. A weekend of wildlife art, exhibitions and demonstrations at various locations around Charleston. www.sewe.com.

FEB. 13: Valentine's Day Party/Parents' Night Out. Ages 6-13. 6-9 p.m. R.L. Jones Center Pool, Mount Pleasant. Sign up by Feb. 6. $8/person. Swimming, basketball, karaoke, movies and water games are just a few of the activities that will be going on during the night. Pizza and snacks will be served. Jeff Garrard at 884-2528 or visit www.townofmountpleasant.com.

Feb 14: We (heart) Maurice. A 5K Fun Run to benefit Maurice Davis, who is recovering from a stroke. 10 a.m. Hampton Park, Charleston. $15. On-site registration only at 9:30 a.m. the day of the race. Contact Jennifer Smock at 469-3886 or 569-3507.

Feb. 14: A Walk in the Woods, Waterfowl of Tibwin Plantation. 8:30 a.m. Meet at South Tibwin trailhead and join Mark Danaher, biologist for the Francis Marion National Forest, as he guides a walk along the trails of Tibwin, which is managed for migratory waterfowl. Registration is required by Feb. 13. Limit 20. To register, call 928-3368. Free.

Feb. 14: Sullivan's Island Fire and Rescue Squad Winter Oyster Roast. 5-8 p.m. Sullivan's Island fish-fry shack near Fort Moultrie. $20 in advance and $25 at the event. Advance tickets are available at the Sullivan's Island Fire Station, Town Hall, Piggly Wiggly at Sea Island Shopping Center, Simmons Seafood and Exit Realty.

Feb. 20-22: "Yoga and Vegetarianism." Book release party, music, yoga classes with Sharon Gannon and David Life. www.jivamukti yogasc.com.

FEB. 20: Family Fun Night. 7-8:30 p.m. Park West Pool, Mount Pleasant. Free. A night of swimming fun and games. Families may unwind in the pool after a hectic week of work and school. Floats and water toys are welcome.

Feb. 21: Sixth Master of Environmental Studies Student Association 8K for H2O. 9 a.m. Folly Beach. Sarah Mooney at sugarmooni@hotmail.com or 410-703-4916.

FEB. 28: Jim Ryckman Basketball Tournament. 9 a.m. Park West Gym, Mount Pleasant. $45 early registration; $55 after Feb. 21. An annual 3-on-3 half-court basketball tournament open to any interested team with players ages 50 and older. Age divisions will be 50+, 55+, 60+ and 65+. 856-2166.