Key Biscayne
The Cape Florida lighthouse, first built in 1825 and rebuilt in 1846 after an attack, is the county's oldest standing structure, and the island around it is two state parks with a village between them, reached by a causeway that charges a toll. Cycle its full length, swim on the Atlantic side, and understand the appeal: a mangrove and beach island inside a metropolitan area of six million.
Why go
A barrier island inside a metropolis — two state parks and a village, six kilometres from downtown Miami. Cape Florida lighthouse — 1825, the oldest standing structure in the county, at the island's southern tip. Calm, shallow water — the bay side is flat enough for beginners on a paddleboard all year. Crandon Park — a beach with a coral reef offshore and picnic grounds under Australian pines.
The character
Key Biscayne is the northernmost of the Florida Keys, joined to Miami by the Rickenbacker Causeway of 1947, and roughly two-thirds of it is protected: Crandon Park at the north end, Bill Baggs Cape Florida State Park at the south, and a village of about fourteen thousand between them. It was a coconut plantation until the 1940s, and the Matheson family, who owned it, gave much of the land to the county on condition that it stay parkland.
That condition is why the island works. It has the density of a suburb rather than a resort strip, the mangroves and dunes are intact, and the lighthouse at the southern point has stood since 1825 — attacked and burned during the Second Seminole War in 1836, rebuilt in 1846, and now the oldest building in Miami-Dade County. Richard Nixon kept a winter White House here in the 1970s. What a visitor gets is the rarest thing in south Florida: a natural barrier island with a skyline in view across the bay.
Places of character
Bill Baggs Cape Florida State Park — the lighthouse, a mile of beach and a restored keeper's cottage. Crandon Park — the north beach with a sandbar offshore, and a nature centre in the mangroves. The Rickenbacker Causeway — cycle it at dawn for the Miami skyline from the water; it is the city's own training ride. Hobie Island and Virginia Key — kitesurfing and windsurfing flats on the way in from the mainland. Village Green and the shops — a small, entirely local commercial centre with no resort feel at all. Stiltsville — seven houses on stilts in Biscayne Bay, visible from boats, built between the 1930s and 1960s.
The way to do it
Cycle: the causeway and the island are flat and the cycle path is continuous from Miami. Climb the lighthouse — tours are limited and free with park entry. Swim on the ocean side and paddle on the bay side. And take a boat toward Stiltsville if you can; those houses explain more about old Miami than any museum.
One perfect day
Cycle out over the Rickenbacker at sunrise with the skyline behind and the bay flat. Coffee in the village. Morning at Cape Florida: the lighthouse tour, then the beach at the point where two waters meet. Cuban lunch in the village — this is Miami, and the food is not island food. Afternoon paddleboarding on the bay side or snorkelling the sandbar off Crandon. Late light at the north end looking back at downtown. Dinner outside, then the ride back over the causeway with the city lit ahead.
Grand hotels
Ritz-Carlton Key Biscayne — the island's only large resort, on Crandon's beach with a spa and a tennis history. The Perry Hotel, Key West — for the other end of the Keys, if the drive south is on the plan.
When to go
Best expression: December to April — dry, warm, low humidity and the water clear. Consider: late March for the Miami Open, held on the island until 2018 and still a local season. Avoid if possible: August and September, humid and in the peak of hurricane season.
The frame
Ideal stay 2 nights · Minimum a day from Miami · Best arrival by bicycle or car over the causeway · Airport MIA, 20 km · Walkability the village yes; the island by bicycle · Best without a car yes, by bicycle