Nickajack Bat Cave paddle: Today, 6-9 p.m.; $35, includes equipment and guides; reservations required. Email tiffany@outdoorchattanooga.com or call 842-6629.
South Cumberland State Park hike: Friday, 3 p.m. CDT, moderate 5-miler from Foster Falls parking area, with information on how wild animals and plants prepare for winter. See www.friendsofscsra.org.
Tennessee Wild hike: Saturday, very strenuous 11.2-mile hike on Big Frog Trail. See tnwild.org or call Jeff Hunter at 322-7866.
Wilderness Adventure Challenge: Saturday, Ocoee River area; team event. Email Derrick Mason at wildernessadventurechallenge@gmail.com.
7 Hills 3 Rivers Adventure Race: Saturday, Rome, Ga.; run 5 miles, bike 12 miles, paddle 4 miles; Family Challenge option with 1-mile run, 1-mile paddle, 4-mile bike and cross-river swim for ages 7-14 along with parents/guardians (7-9 & 10-14 divisions). Contact Joe Cook at jcook@coosa.org or 706-232-2724 or Sarah Husser at shusser@coosa.org or 706-296-7103.
Ride the Bend historical ride: Sunday, 9:30 a.m., beginning at Outdoor Chattanooga, Coolidge Park. To reserve a bike, email ruth@outdoorchattanooga.cm or call 643-6888.
Adaptive ride at Tennessee Riverpark: Monday, 6 p.m., from Hubert Fry Center; volunteers needed to ride with people with various disabilities. Call Elaine Adams at 697-1345 to reserve equipment. Also, free ride for ages 55-older; email kassi@outdoorchattanooga.com or call 643-7880.
Rapid Learning Whitewater Club roll practice: Tuesday, 5:30 p.m., Greenway Farm; first visit free, then $5. Email terri@outdoorchattanooga.com or call 842-6629.
Wacky Paddler Olympics: Sept. 30, 5:30 p.m.; canoe jousting, playboat racing, boat float; part of RiverRocks. See www.outdoorchattanooga.com/2692.htm.
StumpJump 50k & 11-mile trail races: Oct. 1; part of Rock/Creek Trail Series. See "trail series" at www.rockcreek.com.
South Chickamauga canoe trip: Oct. 3, 5:30 p.m.; part of RiverRocks; $8, includes guides and gear, reservation required. See www.outdoorchattanooga.com/2694.htm.
Rapid Learning roll practice: Oct. 4, 5:30 p.m., Greenway Farm; $5. See www.outdoorchattanooga.com/2696.htm.
Beginning mountain bike clinic: Oct. 5, 5:30 p.m.; learn basics of singletrack riding; $8, reservation required; part of RiverRocks. See www.outdoorchattanooga.com/2698.htm.
ETPDA AKC-licensed field trial: Oct. 7-9, Gun Dog Development Grounds, Spring City, beginning 7:30 a.m.; open and amateur puppy, derby, limited gun dog and gun dog stakes, open to all AKC-registered pointing breeds; fees $30-$40 per stake; deadline Oct. 4, 5 p.m.; drawing Oct. 5, 7 p.m. Contact Bill Barber at williambarber.1945@yahoo.com or 423-365-6652.
Swim the Suck: Oct. 8, Tennessee River. See www.swimthesuck10mile.com.
Chattanooga Head Race: Oct. 8, rowing competition in Tennessee River. See www.chattanoogaheadrace.com.
Triple Crown bouldering competition: Oct. 8, Stone Fort. See www.triplecrownbouldering.org.
Urban Nature 10k: Oct. 8. Sign up at www.ultrasignup.com/register.aspx?did=14344.
Local Tenn. Ornithological Society meeting: Oct. 13, 7 p.m., Ascension Lutheran Church, 720 S. Germantown Road. Contact David Stone at rockyturf@comcast.net or 238-4234.