Cycling at Altitude in Colombia: How to Acclimatise

Almost every rider who joins us arrives from close to sea level and rides their first Colombian kilometre somewhere above 2,500 metres. That transition is the single biggest variable in how much you enjoy the first three days. It is also, with a little planning, the easiest one to manage.

What follows is what we have learned from guiding riders through it, not medical advice. If you have a cardiovascular or respiratory condition, or you are on medication, talk to your doctor before the trip — and tell us, so we can plan around it.

01 — The ground floorYou land already high

Bogotá sits at about 2,640 metres. That is your starting point, not your destination. From there the traverse works through the altiplano cundiboyacense and climbs toward the high country around Lago de Tota, with stages running roughly between 2,500 and 3,100 metres and páramo sections above that.

For context: many European cyclists have never ridden above 2,000 metres outside of a summer camp. Here, 2,600 metres is where breakfast happens.

02 — What actually happens to youThe first 72 hours

Above roughly 2,500 metres, the reduced partial pressure of oxygen means each breath delivers less oxygen to your blood. Your body responds immediately — faster breathing, higher heart rate at any given effort — and then more slowly over days and weeks by producing more red blood cells. You will not complete that second process during a ten-day tour. What you will get is the early adaptation, and it is enough.

Common and normal in the first days: breathlessness on mild efforts, a higher resting heart rate, broken sleep, a mild headache, and less appetite than usual. Not normal, and worth telling a guide immediately: a headache that does not respond to rest and fluids, nausea and vomiting, confusion, unusual clumsiness, or breathlessness at rest. Those are the warning signs of acute mountain sickness, and the correct response is to descend, not to push on.

Altitude is not something to conquer on day one. It is something to spend the first three days negotiating with.

03 — What to do before you arriveThe week that helps

• Arrive rested. Turning up sleep-deprived from a long flight compounds every altitude symptom.
• Do not taper into nothing. Keep riding easily in the week before; arriving detrained does not help.
• Check your iron. Red-cell production needs iron. If you know you run low, raise it with your doctor well in advance — not the week before.
• Ask your doctor about acetazolamide. It is commonly prescribed for altitude prophylaxis, it has side effects worth knowing about, and it is a conversation for a physician who knows your history — not for a travel blog.
• Plan extra days if the calendar allows. Two or three additional nights on the altiplano before the tour is the single most effective thing you can do.

04 — What to do once you are hereThe daily habits

• Drink more than you want to. The air is dry and you lose water through breathing far faster than at home. Pale urine is the simplest useful indicator.
• Go easy on alcohol in the first 48 hours. The altitude will already be affecting your sleep; you do not need help.
• Eat carbohydrate, and eat it often. Appetite drops at altitude exactly when you need fuel most. Eat on a schedule rather than on hunger.
• Ride the first days deliberately slowly. If you can hold a conversation, you are doing it correctly.
• Protect your skin and eyes. UV intensity rises sharply with altitude and Boyacá sits close to the equator. Sunscreen and proper lenses are not optional.
• Layer for the páramo. A sunny 3,200-metre morning becomes a cold, wet afternoon with very little warning.

05 — How we sequence the traverseThe itinerary is the acclimatisation plan

The stage order is not an aesthetic choice. We open with the lower valley stages — Guatavita to Sopó, then Puente de Boyacá toward Ráquira — where the riding is genuinely enjoyable at an effort your body can afford while it adapts. The Villa de Leyva desert loop adds distance without adding much altitude. Only then do we move into the high country around Tota for the queen stage.

By the time race day arrives at the Gran Fondo Boyacá Mundial, you have had more than a week on the altiplano. That is the difference between riding the event and surviving it.

The support van is at the back of every stage, every day, for exactly this reason. Riders occasionally need a lift on day two and then ride every remaining stage in full. That is a good outcome, not a compromised one.