BEAT THE HEAT
Keep cool canoeing or kayaking Oleta River State Park's calm waters. Choose from open water or mangrove trails. 8 a.m.-8 p.m. Any day. Oleta River State Park, 3400 NE 163rd St., North Miami. $2-$6. Details: (305) 919-1844 or www.floridastateparks.org.
MAKE A SPLASH
At Amelia Earhart Park, mountain bike a 5.5-mile trail with challenging slopes and runs or practice a variety of water sports at the 91-acre lake. Learn to wakeboard with experienced coaches from the Miami Wakeboard Cable Complex. 7 a.m.-8 p.m. Amelia Earhart Park, 401 E 65th St., Hialeah. $6 parking fee. Fees vary. Details: (305) 685-8389 or www.miamidade.gov/parks.
SUNSET BOAT TOUR
HistoryMiami offers a sunset eco boat tour of Oleta River. Look for dolphins, manatees and herons on an open boat sunset tour with HistoryMiami's eco-historian, Frank Schena. The tour passes the islands of Biscayne Bay to Bal Harbour, Bay Harbor Islands and Sunny Isles Beach to Oleta River. 4-6 p.m. Pelican Harbor Marina, 1275 NE 79th St. Causeway, North Bay Village. $12 for children under 12. $30 HistoryMiami members. $40 others. RSVP required. Details: (305) 375-1621 or email@example.com or www.historymiami.org.
Explore North Miami's Greynolds Park, Miami-Dade County's second-oldest park, with a naturalist guide describing the area's flora, fauna and history. 9 a.m. Greynolds Park, 17530 W Dixie Highway, North Miami Beach. $3. Reservations recommended. Details: (305) 949-1741 or www.miamidade.gov/parks/parks/greynolds.asp.
KAYAK THE KEY
Happen upon great blue herons, upside down jellyfish and spotted eagle rays by kayak on a guided tour of the forgotten natural side of Key Biscayne. 1:30-4 p.m. Crandon Park Visitors and Nature Center, 6767 Crandon Blvd., Key Biscayne. $44. Details: (305) 365-3018 or www.miamidade.gov/parks.
Explore Key Biscayne on a three-hour, 10-mile guided bicycle tour. Highlights include views of Stiltsville, white-sand beaches facing the open ocean, the remote lighthouse outpost, which is one of Miami-Dade County's oldest structures, and the quiet beauty of Biscayne Nature Center. 9:30 a.m. Bill Baggs Cape Florida State Park, 1200 Crandon Blvd., Key Biscayne. $65. Details: (305) 774-9019 or firstname.lastname@example.org or www.dragonflyexpeditions.com.
PADDLE THE GABLES
Take in The City Beautiful's memorable sites by water on a Historic Coral Gables Waterway Canoe Adventure. 9 a.m.-noon. A.D. Barnes Park, 3401 SW 72nd Ave., Coral Terrace. $33. Details: (305) 365-3018 or www.miamidade.gov/parks.
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. 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.