Zugspitze

The Zugspitze is Germany's highest mountain — 2,962 metres above sea level, right on the border between Bavaria and the Austrian Tyrol. It's not the Himalayas. But at that altitude you're breathing 70% of the oxygen available at sea level, and after ten hours of hiking, your body notices.

Unlike many Alpine peaks at similar elevations, the Zugspitze doesn't require technical climbing gear for the standard route. You need legs, endurance, and the ability to handle 2,250 metres of vertical gain in a day. The final section is a short via ferrata — difficulty A/B. Nothing extreme, but not a stroll either.

The Reintal route is one of the longest approaches in the northeastern Alps: 21 km of trail, starting almost from the valley floor and ending between the antenna towers of Germany's highest weather station. It's a route with history. The first documented ascent was made in 1820.

Technical Details

The Route

The trail starts at the Olympia-Skistadion in Garmisch-Partenkirchen (720m) and heads toward the Partnachklamm — a limestone gorge with a small entrance fee (around €4). From there you enter the Reintal valley: long, occasionally monotonous, but progressively wilder as you gain altitude.

About halfway up you'll reach the Reintalangerhütte (1,366m) — the only hut on the route, and a mandatory overnight stop if you're splitting the climb over two days. If you're going for the summit in one push, you need to leave by 5:00 AM. No exceptions.

The final 500 metres of elevation take you above the treeline. The via ferrata — short, well-equipped — connects the last plateau to the summit cross. It's not the hardest part of the route. The hardest part is kilometre nine, when your legs have already done most of the work.

Oxygen and Acclimatization

At 2,962m the partial pressure of oxygen is 70% of sea level. That's not enough to cause serious AMS in most people — the risk here is low. But expect some noticeable extra effort in the final hours of climbing, especially if you're not used to altitude.

Arterial oxygen saturation (SpO2) at the summit typically drops to 88–92% for healthy adults ascending from the valley in a day. You've already lost 4–5 points of SpO2 compared to home. Not dangerous for most — but if your baseline SpO2 runs low, use your personal values as a reference.

Mild headache on the final ascent? Possible. Nausea? Rare at this altitude with a gradual approach through the Reintal. Ataxia or confusion? Never normal — if you notice either, descend.

Resting heart rate near the summit can rise 10–15 bpm above your usual values. That's a normal physiological response to mild hypoxia. It settles down within 30–60 minutes of rest or descent.

Preparation

Essential gear

• Rigid hiking boots with good grip (long trail plus exposed via ferrata)
• Light gloves and waterproof jacket — above 2,000m the weather can shift in 30 minutes
• At least 2 litres of water (fountains available in the lower Reintal section)
• Headlamp if you're starting before dawn
• Basic first aid kit

Physical fitness Let's be straight: 2,250m of vertical gain in a day over 21 km is a long, demanding day. If you don't already have a few 1,000m+ elevation days in your legs, consider breaking it into two days with a night at the Reintalangerhütte. It's not giving up — it's a smarter plan.

Best time to go July and August give you the most reliable conditions. In June, residual snow on the via ferrata section can make it slippery. From October onward, winter conditions arrive fast — check the Zugspitze weather station for current conditions before heading out.

Frequently Asked Questions

Can you get altitude sickness on the Zugspitze?

Yes, though the risk is low. Acute mountain sickness (AMS) is possible but unusual at 2,962m for people ascending gradually from the valley. The main risk factors are climbing too fast and not drinking enough. If you've had AMS at similar altitudes in the past, take that as a signal — consider the two-day plan.

How long does the Reintal route take?

From the Olympia-Skistadion, expect 8–11 hours of ascent. The trail is long, not technically difficult. Strong hikers typically arrive in 8 hours; a steady pace gets you there in 10–11 hours. Factor in the descent: another 7–9 hours, and your knees will thank you for trekking poles.

Do you need climbing gear?

No, for the standard Reintal route. The final via ferrata (A/B) only requires free hands and comfort with exposed terrain. If there's residual snow on the ferrata (common in June), lightweight gaiters and trekking poles help. Crampons and ice axe are not needed under normal summer conditions.

What does 70% oxygen actually feel like?

It's noticeable — though most people don't recognize it until they stop moving. At rest near the summit you'll breathe slightly deeper or faster than usual. During the final push, your aerobic capacity is lower than at sea level: what felt like a comfortable pace lower down starts to feel harder. Three minutes of rest recover you more than you'd expect. That's altitude doing its thing.