Paddle across Biscayne Bay on a guided moonlight canoe tour, which includes a stop at Chicken Key. A Deering Estate staff member will tell attendees ecological tidbits about the bay over a campfire and snacks. 7-11 p.m. Deering Estate at Cutler, 16701 SW 72 Ave., Palmetto Bay. $40. Details: (305) 235-1668 or www.deeringestate.org.
FLORA AND FAUNA
Walk through Miami-Dade County's second-oldest park with a naturalist on hand to share tales about local history, flora and fauna. 2-3 p.m. Greynolds Park, 17530 W Dixie Highway, North Miami. $3. Details: (305) 949-1741 or www.miamidade.gov/parks/parks/greynolds.asp.
ALL ABOUT OWLS
Learn about native nocturnal wildlife, hike a paved nature trail with guides and swap stories fireside at A.D. Barnes Park. Bring your own hotdogs, chocolate and graham crackers — the marshmallows are provided. 7-9 p.m. A.D. Barnes Park, 3401 SW 72 Ave., Miami. $6. Details: (305) 666-5883 or www.miamidade.gov/parks/parks/ad'barnes.asp.
Catch an up-close glimpse of wading birds and other wildlife on a guided kayak exploration of the Oleta River and its mangrove-lined creeks. Also included is an opportunity to visit an archeological site where Tequesta Indians lived more than 2,000 years ago. 10 a.m.-1 p.m. East Greynolds Northeast Regional Dog Park, 16700 Biscayne Blvd., North Miami Beach. $25. Details: (305) 945-3425 or www.miamidade.gov/parks/greynolds.asp.
VIZCAYA BY NIGHT
Sip wine and enjoy live music before taking a tour of Vizcaya's gardens at night. 6:30-9 p.m. Also held on Wednesday. Vizcaya Museum and Gardens, 3521 S Miami Ave., Coconut Grove. $15. Details: www.vizcayamuseum.org.
The 2010 ING Miami Marathon and Half Marathon is aiming to break its participation records of past years, seeking 18,000 participants for this year's 26.2 mile and 13.1 mile courses through the streets of Miami and Miami Beach. The run has been named one of the "Top 10 Races to Do" by Runner's World magazine. 6 a.m. Starts at American Airlines Arena, 601 Biscayne Blvd., Miami. $60-$125 Details: (305) 278-8668 or www.ingmiamimarathon.com.