From San Isidro de El General (2,303 ft / 702 m) to the highest point of the Pan-American Highway on Cerro de la Muerte (10,974 ft / 3,345 m) it is 27.6 miles (44.4 km) at an average of 6% with about 8,690 ft (2,650 m) of climbing. It is one of the hardest climbs in Costa Rica and a classic of the Vuelta a Costa Rica: you go from the heat of the El General valley to the páramo of the Talamanca range, next to Cerro Buenavista (11,453 ft / 3,491 m).
What the climb is like
- San Isidro to La Georgina (24.5 miles / 39.4 km, 6%). A long, steady climb on the Pan-American Highway (Route 2). The grade rarely goes past 8%, with tight bends and a few potholed stretches. Around km 40 (mile 25) is La Georgina, a false summit with a restaurant.
- The finish (3.1 miles / 5 km, 5.7%). After a short descent of a little over 0.6 miles (1 km), the road climbs again to the highest point of the Pan-American.
The segment profile figures are the ones the 2024 Vuelta a Costa Rica published (39.4 km at 6% and another 5 km at 5.7%). PJAMM gives 28.9 miles (46.5 km) at 5.3% with about 8,200 ft (2,500 m) of gain, and La Nación counts about 24.9 miles (40 km) from downtown San Isidro to La Georgina. Wikipedia puts the highest point of the road at about 10,974 ft (3,345 m); other reports give 10,945 ft (3,336 m).
Its history
Before the highway, crossing these mountains took three or four days on foot or horseback, and tradition says the cold and rain killed many farmers: hence the name, Mountain of Death. Today it is the big climb of the Vuelta a Costa Rica, which often climbs it from Pérez Zeledón (the canton San Isidro belongs to) on the way to Cartago or San José. In 2024 the women’s race climbed it from San Isidro for the first time.
When to go, weather, water and traffic
The dry season, December to April, is best; from May to November it rains a lot and fog hides the views. It is cold at the top for the tropics: between 34 and 55 °F (1 and 13 °C), compared with about 68 °F (20 °C) in San Isidro. At 10,974 ft (3,345 m) the air holds about a third less oxygen than at sea level.
Traffic is the main danger: it is the country’s main road to the south, with buses and trucks, almost no shoulder and tight bends where vehicles pass close. Use a rear light even in daytime. The only reliable place for water and food on the climb is the restaurant at La Georgina, around km 40 (mile 25).
What gearing to use
The grade is moderate and steady: a 34x28 gets you up at 3 W/kg (watts per kilogram of body weight); on 6% you ride about 8.7 mph (14 km/h) at 91 rpm, and a 34x30 or 34x32 gives you some margin for the final hours. Compare options in the gear calculator.
Tips
- Start very early: fog and rain usually arrive after midday.
- Carry food for three hours; do not count on anything until La Georgina.
- Keep a warm layer in your pocket: descending from 10,800 ft (3,300 m) in wet clothes is dangerous.
Frequently asked questions
How long does it take to climb Cerro de la Muerte?
A 159 lb (72 kg) rider on a 21 lb (9.5 kg) bike takes about 3 hr 10 min at 3 W/kg (216 W), 3 hr 44 min at 2.5 W/kg and 2 hr 27 min at 4 W/kg. Work out your own time with your weight and power in the calculator on this page.
Why is it called Cerro de la Muerte?
The name means Mountain of Death. Before the highway it was a trail that took three or four days on foot or horseback, and according to tradition the cold and rain killed many farmers crossing it.
What is the weather like on Cerro de la Muerte?
Cold for the tropics: up high the temperature ranges from 34 to 55 °F (1 to 13 °C), and fog and rain are common all year. Down in San Isidro it is around 68 °F (20 °C). Bring a jacket, gloves and lights.