The Flattest and Fastest Ironman and 70.3 Bike Courses

What makes a bike course fast

Ironman (180 km bike) — 19 flat courses

• Ironman Florida — Panama City Beach, United States, 7 November 2026 — One flat, fast lap from Panama City Beach into Pine Log State Forest.
• Ironman Cozumel — Cozumel, Mexico, 22 November 2026 — Three laps of the island of Cozumel: fast ocean-side roads and the hotel zone.
• Ironman Valdivia — Valdivia, Chile, 29 November 2026 — Chile's first full-distance IRONMAN, in the river city of Valdivia.
• Ironman Western Australia — Busselton, Australia, 6 December 2026 — Two fast, flat laps from Busselton along the coast and through the Tuart Forest.
• Ironman Penghu — Penghu, Taiwan, 11 April 2027 — The windswept islands of Penghu, in the Taiwan Strait.
• Ironman Texas — The Woodlands, United States, 24 April 2027 — Two loops on the Hardy Toll Road from The Woodlands: fast, flat and closed to traffic.
• Ironman Vietnam — Da Nang, Vietnam, 9 May 2027 — Full distance on the flat coast of Da Nang, in central Vietnam.
• Ironman Jacksonville — Jacksonville, United States, 16 May 2027 — Flat north Florida roads around Jacksonville.
• Ironman Hamburg — Hamburg, Germany, 6 June 2027 — Two loops from Hamburg's centre past the Speicherstadt into the Vier- und Marschlande.
• Ironman Tallinn — Tallinn, Estonia, 7 August 2027 — Fast city and countryside roads south of Tallinn, from Lake Raku: two laps.
• Ironman Canada-Ottawa — Ottawa, Canada, 8 August 2027 — The Ottawa valley: a flat full-distance bike course in Canada's capital region.
• Ironman Kalmar-Sweden — Kalmar, Sweden, 21 August 2027 — Flat roads from Kalmar over the Öland Bridge onto the island of Öland.
• Ironman Copenhagen — Copenhagen, Denmark, 22 August 2027 — From Amager Strandpark through Copenhagen and north along the Øresund coast.
• Ironman Italy Emilia Romagna — Cervia, Italy, 18 September 2027 — Two loops from Cervia through the Romagna countryside and the Salt Pans, up to Bertinoro.
• Ironman Maryland — Cambridge, United States, 18 September 2027 — Truly flat, windy roads of Maryland's Eastern Shore and the Blackwater refuge, from Cambridge.
• Ironman Calella-Barcelona — Calella, Spain, 3 October 2027 — Flat and fast along the Maresme coast from Calella: a course where sub-8-hour times have been set.
• Ironman California — Sacramento, United States, 24 October 2027 — Flat Sacramento Valley roads, after a swim in the American River.
• Ironman San Juan — San Juan, Argentina, date to be confirmed — Full distance in San Juan, Argentina, on the dry plain below the Andes.
• Ironman Tours Loire Valley — Tours, France, date to be confirmed — A completely flat, fast course through the Loire Valley vineyards, past the Château d'Ussé.

IRONMAN 70.3 (90 km bike) — 59 flat courses

• Ironman Campeche 70.3 — Campeche, Mexico, 8 November 2026 — Two flat loops along Campeche's Malecón and the Mérida highway.
• Ironman Melbourne 70.3 — St. Kilda, Australia, 8 November 2026 — Melbourne's bayside: a flat, fast course from St Kilda.
• Ironman Phu Quoc 70.3 — Phu Quoc, Vietnam, 15 November 2026 — Phu Quoc's southern coast: an incredibly fast 15 km straight and a crossing to Sun World Hon Thom.
• Ironman Cartagena 70.3 — Cartagena, Colombia, 29 November 2026 — Fast and mostly flat along the Vía al Mar from Cartagena towards Barranquilla, by beaches and mangroves.
• Ironman Sergipe 70.3 — Aracaju, Brazil, 29 November 2026 — Three mostly flat laps by the coast of Aracaju, in north-eastern Brazil.
• Ironman Valdivia 70.3 — Valdivia, Chile, 29 November 2026 — Southern Chile's river city: a flat course around Valdivia, with a run past its bridges.
• Ironman La Quinta 70.3 — La Quinta, United States, 6 December 2026 — Flat and fast in the Coachella Valley, with a lap of the Thermal Raceway.
• Ironman Veracruz 70.3 — Veracruz, Mexico, 6 December 2026 — Flat coastal roads of Veracruz, on the Gulf of Mexico.
• Ironman Western Australia 70.3 — Busselton, Australia, 6 December 2026 — One fast, flat lap from Busselton along the coast and through the Tuart Forest.
• Ironman Bahrain 70.3 — Manama, Bahrain, 11 December 2026 — A flat, fast 90 km in Bahrain that takes in part of the Bahrain International Circuit.
• Ironman Florida 70.3 — Haines City, United States, 13 December 2026 — Very fast rural roads of Polk County, Florida, past orange groves and lakes.
• Ironman Panama 70.3 — Panama City, Panama, 28 February 2027 — Three laps of Panama City: the Amador Causeway, the Cinta Costera, Casco Viejo and Panamá Viejo.
• Ironman Punta del Este 70.3 — Punta del Este, Uruguay, 7 March 2027 — Two loops along the coast of Punta del Este to the Punta Ballena hill, past Casapueblo.
• Ironman Hengqin 70.3 — Hengqin, China, 14 March 2027 — Two laps from Hengqin through the Dahengqin Mountain Tunnel to the sea road of Huandao South.
• Ironman Texas 70.3 — Galveston Island, United States, 4 April 2027 — Dead flat on Galveston Island, by the Gulf of Mexico, with the wind as the only climb.
• Ironman San Juan 70.3 — San Juan, Argentina, 11 April 2027 — San Juan's Andean foothills in Argentina: a fast bike course at around 700 m.
• Ironman Brasilia 70.3 — Brazil, 18 April 2027 — Two flat laps of Brasília's wide avenues, past the capital's landmarks, at about 1,100 m.
• Ironman Valencia 70.3 — Valencia, Spain, 18 April 2027 — The orchards and coast of Valencia: a flat to gently rolling bike course.
• Ironman Venice-Jesolo 70.3 — Jesolo, Italy, 24 April 2027 — One fast, flat loop of long straights around the Venetian lagoon, over the bridge of boats.
• Ironman Peru 70.3 — Lima, Peru, 25 April 2027 — Lima's Pacific coast: a flat, fast bike course on the Costa Verde.
• Ironman Western Sydney 70.3 — Penrith, Australia, 2 May 2027 — Two laps from Penrith's regatta centre through the countryside below the Blue Mountains.
• Ironman Gulf Coast 70.3 — Panama City Beach, United States, 8 May 2027 — Flat and fast from Panama City Beach into Pine Log State Forest, with a headwind home.
• Ironman Da Nang 70.3 — Danang, Vietnam, 9 May 2027 — Flat roads along the coast of Da Nang, in central Vietnam.
• Ironman Davao Philippines 70.3 — Davao City, Philippines, 13 June 2027 — A flat out-and-back on Davao City's Coastal Road, between the bay and the mountains.
• Ironman Eagleman 70.3 — Cambridge, United States, 13 June 2027 — Truly flat, but windy: one loop through Maryland's Blackwater National Wildlife Refuge.
• Ironman Rockford 70.3 — Rockford, United States, 13 June 2027 — The rolling farm roads of northern Illinois around Rockford.
• Ironman Westfriesland 70.3 — Hoorn, Netherlands, 20 June 2027 — One loop from Hoorn's old harbour through the Westfriesland polders and windmill villages.
• Ironman Elsinore 70.3 — Elsinore, Denmark, 27 June 2027 — North Zealand's coast and countryside around Elsinore, home of Kronborg Castle.
• Ironman Muncie 70.3 — Muncie, United States, 10 July 2027 — Very flat and fast: an out-and-back on closed highways through rural Indiana.
• Ironman Musselman 70.3 — Geneva, United States, 11 July 2027 — Seneca Lake and the vineyards of the Finger Lakes, from Geneva, New York.
• Ironman Ohio 70.3 — Sandusky, United States, 18 July 2027 — One flat loop through the farmland of Erie and Sandusky counties: about 820 ft of climbing.
• Ironman Oregon 70.3 — Salem, United States, 18 July 2027 — Fast and flat, out and back along the Willamette River valley from Salem.
• Ironman Lapu-Lapu 70.3 — Lapu Lapu City, Philippines, 8 August 2027 — Mactan and Cebu: a flat bike course from Lapu-Lapu City in the Philippines.
• Ironman Leipzig 70.3 — Leipzig, Germany, 8 August 2027 — One loop of Leipzig's New Lake District, from lake to lake: fast, with technical sections.
• Ironman Rio de Janeiro 70.3 — Rio de Janeiro, Brazil, 8 August 2027 — From Copacabana through Botafogo and Flamengo to downtown Rio, two laps of the city's waterfront.
• Ironman Tallinn 70.3 — Tallinn, Estonia, 8 August 2027 — The flat roads of northern Estonia around Tallinn, by the Baltic.
• Ironman Colombo 70.3 — Colombo, Sri Lanka, 22 August 2027 — Sri Lanka's capital at sea level: a flat bike course after a swim off Galle Face.
• Ironman Duisburg 70.3 — Duisburg, Germany, 29 August 2027 — Two flat, fast loops over the Rhine on the Bridge of Solidarity, towards Moers.
• Ironman Erkner 70.3 — Erkner, Germany, 12 September 2027 — Two flat, fast loops on smooth roads along the Spree, into the forests and lakes of Brandenburg.
• Ironman Emilia Romagna 70.3 — Cervia, Italy, 19 September 2027 — One 90 km loop from Cervia through the Romagna countryside and the Salt Pans park, home of pink flamingos.
• Ironman Cozumel 70.3 — Cozumel, Mexico, 26 September 2027 — The flat roads of the island of Cozumel, in Caribbean heat and wind.
• Ironman North Carolina 70.3 — Wilmington, United States, 16 October 2027 — Point to point from Wrightsville Beach through the countryside, over the Cape Fear River to Wilmington.
• Ironman Málaga 70.3 — Malaga, Spain, 31 October 2027 — The Costa del Sol around Málaga, on flat coastal roads.
• Ironman Waco 70.3 — Waco, United States, 14 November 2027 — One fast loop through the Heart of Texas countryside, past silos and longhorns.
• Ironman Baku 70.3 — Baku, Azerbaijan, date to be confirmed — A flat, fast course south of Baku, through the city's historic oil fields, beside the Caspian.
• Ironman Belgrade 70.3 — Belgrade, Serbia, date to be confirmed — Two loops of the straight avenues of Belgrade, out to the suburbs and back by Lake Sava.
• Ironman Buenos Aires Palermo 70.3 — Buenos Aires, Argentina, date to be confirmed — Three flat, fast laps on a Buenos Aires highway after a swim in Palermo.
• Ironman Cap Cana 70.3 — Cap Cana, Dominican Republic, date to be confirmed — One flat 90 km loop, mostly on the national highway beside the Caribbean resort of Cap Cana.
• Ironman Dali 70.3 — Dali, China, date to be confirmed — Three almost flat laps beside Erhai Lake, in Yunnan, on smooth roads at altitude.
• Ironman Dhofar 70.3 — Salalah, Oman, date to be confirmed — Out and back along the Indian Ocean coast from Salalah towards Mirbat: rolling and fast.
• Ironman Encarnacion 70.3 — Encarnacion, Paraguay, date to be confirmed — Two loops on Encarnación's Costanera road, by the Paraná river: mostly flat with a few rolling hills.
• Ironman Knokke-Heist 70.3 — Knokke-Heist, Belgium, date to be confirmed — The flat Belgian coast and polders around Knokke-Heist, now home to a full-distance IRONMAN.
• Ironman Monterrey 70.3 — Monterrey, Mexico, date to be confirmed — Two fast laps on the express lanes of Monterrey's Constitución freeway.
• Ironman New York 70.3 — Jones Beach, United States, date to be confirmed — A once-in-a-lifetime ride on the closed Wantagh Parkway, from Jones Beach.
• Ironman Poznan 70.3 — Poznan, Poland, date to be confirmed — Flat roads of Greater Poland from the lakes of Poznań.
• Ironman Shanghai Chongming 70.3 — Shanghai, China, date to be confirmed — Out-and-backs on the flat Beiyan Highway of Chongming Island, at the mouth of the Yangtze.
• Ironman Sharm El-Sheikh 70.3 — Sharm El-Sheikh, Egypt, date to be confirmed — Desert roads between the Red Sea and the mountains of South Sinai, at Sharm El-Sheikh.
• Ironman Türkiye 70.3 — Belek, Türkiye, date to be confirmed — Two flat loops on Belek's multi-lane roads: about 80 m of climbing, only over bridges.
• Ironman Warsaw 70.3 — Warsaw, Poland, date to be confirmed — Flat roads around Warsaw, by the Vistula.

How to train for a flat course

• How to train for the bike leg