Iztaccihuatl — Ascent to the Refuge of the 100 (4,780 m): A High-Altitude Day from Mexico City
Difficulty
challenging
Duration
24 hours (full day or overnight)
Fitness Level
Good aerobic fitness with prior high-altitude experience recommended; able to hike 6–10 hours with elevation gain.
Overview
A high-altitude day (or overnight) on Iztaccíhuatl takes you up volcanic ridgelines to the Refugio de los Cien, where views of Popocatépetl and Pico de Orizaba reward careful pacing. This route mixes loose volcanic sand, steep benches, and thin air — ideal for climbers ready to test their acclimatization and planning.
Iztaccihuatl — Ascent to the Refuge of the 100 (4,780 m): A High-Altitude Day from Mexico City
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You leave Mexico City before dawn and the urban glow loosens its grip as the road climbs into the Izta-Popo National Park. By the time the bus stops at the parking area — the shoulders of the “Sleeping Woman” — the air has sharpened; winds push at the trees and the first light strips the valley into hard detail.
Adventure Photos
Adventure Tips
Acclimate before you go
Spend at least one day at altitude (Mexico City or Amecameca) before attempting the climb to reduce acute mountain sickness risk.
Start before sunrise
Begin early to use firmer morning snow and avoid afternoon storms common in the highlands.
Footwork over speed
Sections of sandy volcanic scree can sap energy; use short steps and a steady rhythm to conserve breath.
Bring extra water and snacks
Cold suppresses thirst but not dehydration—carry insulated bottles and high-calorie, easily eaten snacks.
Local Insights
Wildlife
- Mexican volcano rabbit (rarefied and elusive)
- Golden eagle or raptors riding thermal currents
History
Iztaccíhuatl has a long place in Nahua legend as the ‘sleeping woman’ beside Popocatépetl and has been a target for climbers since the 19th century during scientific and exploratory expeditions.
Conservation
Visitor numbers are moderated in Izta-Popo National Park; follow Leave No Trace, stick to established trails, and carry out waste to protect fragile alpine soils.
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Adventure Hotspots in Mexico City
Frequently Asked Questions
Recommended Gear
Mountaineering boots
Stiff, supportive boots handle scree and rocky terrain while protecting ankles at high altitude.
Layered insulation + waterproof shell
Temperatures swing widely; pack breathable insulating layers and a windproof, waterproof outer layer.
Crampons & ice axe
Necessary for icy or hard-packed snow above 4,500 m during cold months.
winter specific
Insulated water bottle & high-energy snacks
Prevents freezing and provides calories for sustained effort at altitude.