Canoe tour from Biscayne Bay to Chicken Key Island. 18 years and older. 7-11 p.m. at Deering Estate at Cutler, 16701 SW 7Second Ave., Miami. $35. Details: (305) 235-1668.
American Heart Association's annual Miami-Dade County Heart Walk. 8 a.m. at Peacock Park, 2820 McFarlane Rd., Coconut Grove. Details: (305) 856-1449 or www.americanheart.org/miamidadewalk.
Heritage Horse Show. Through Sunday. 8 a.m.-7 p.m. at Tropical Park Equestrian Center, 7900 SW 40th St., Miami. Free. Details: (305) 554-7334.
Canoe tour of Lignum Vitae Key. 8 a.m.-6 p.m. Meet at A.D. Barnes Sense of Wonder Nature Center, 3401 SW 7Second Ave., Miami. RSVP required. $45. Details: (305) 365-3018.
Oleta River canoe trip. 10 a.m.-1 p.m. Meet at East Greynolds Park, NE 167th St. and Biscayne Blvd., North Miami Beach. RSVP required. $15-$15-25. Details: (305) 365-3018.
SUNDAYS AT CRANDON
Crandon Park Visitors and Nature Center hosts Sundays "til Sundown the second Sunday of each month with live music and more. 4 p.m. until sundown at 6767 Crandon Blvd., Key Biscayne. Details: (305) 361-6767.
Learn about the haunting past of Arch Creek Park. 7-8:30 p.m. at Arch Creek Park Museum, 1855 NE 135th St., North Miami. RSVP required. $5. Details: (305) 944-6111.
Learn about bats and other creatures of the night at Greynolds Park. 7:30 p.m. Greynolds Park, 17530 W. Dixie Highway. RSVP required. $5. Details: (305) 948-2891.
The Leukemia and Lymphoma Society presents Light the Night Walk, a nationwide event to raise funds for research and patient services.
6-9 p.m. at Bayfront Park, 301 North Biscayne Blvd., Miami. RSVP required. Details: (305) 937-7444 or www.lightthenight.org.