13,855 ft · Monte Rosa Massif, Italy/Switzerland
Castor
Castor is a 13,855 ft peak in the Monte Rosa Massif, Italy/Switzerland. The standard route is the Normal Route via SE Ridge: 10 mi, 6,050 ft of gain, PD.
Castor at a glance
- Elevation13,855 ft4,223 m
- RouteNormal Route via SE RidgePD
- Distance10 mi6,050 ft gain
- Time2–3 daysVery Hard effort
- SeasonJul–Sep
- RangeMonte Rosa MassifItaly/Switzerland
Climbing the Normal Route via SE Ridge
From Zermatt, Switzerland, or the Italian side above Champoluc, approach the Quintino Sella Hut, then summit by the SE ridge (PD), the more elegant of the twin Castor and Pollux and a genuinely popular objective in its own right. The ridge is a classic corniced snow crest, narrow enough to demand steady footwork but never technical. The summit ridge cornices heavily, so stay well back from the eastern edge, and rope up for the crevassed glacier below. It is often combined with Pollux over two days from the same hut; budget 2 to 3 days.
Gear and hazards
What to bring
Backpack (25–35 L)
Mountaineering Boots
Crampons
Ice Axe
Helmet
Harness
Rope
Carabiners
Belay Device- Prusik Cord
- Ice Screw
Base Layer
Midlayer
Insulated Jacket
Hardshell Jacket
Hardshell Pants
Warm Hat
Buff
Midweight Gloves
Glacier Glasses
Sunscreen
Headlamp
GPS Device
Satellite Communicator
Water
First-Aid Kit
Emergency Bivy
Offline Maps
Power Bank
Heavyweight Gloves
What to watch for
- Glacier travel
- Crevasses
- High altitude
- Altitude sickness
- Cornices
- Steep exposure
- Extreme cold
- High winds
- Storms
- Low visibility
- Rapid weather shifts
Quests with Castor
Alpine 4,000ersPeaks near Castor
Frequently asked questions
How tall is Castor?
Castor is 13,855 feet (4,223 m) tall. It is in the Monte Rosa Massif, Italy/Switzerland.
How does Castor rank among the Alpine 4,000ers?
At 13,855 feet, Castor is the 27th highest of the 82 Alpine 4,000ers. The highest is Mont Blanc.
How hard is it to climb Castor?
The Normal Route via SE Ridge is graded PD on the alpine scale, meaning slightly difficult: some scrambling, steeper snow or simple glacier travel. Yak rates the overall effort very hard: 10 miles with 6,050 feet of elevation gain.
How many days does it take to climb Castor?
Most climbers plan 2–3 days for the Normal Route via SE Ridge, with at least one night on the mountain.
Is Castor dangerous to climb?
It has real risks: avalanche and icefall danger, crevasses on the glacier and exposed sections where a fall would be serious. Teams rope up for glacier travel, and many first-timers climb with a guide.
Do you need crampons and an ice axe for Castor?
Plan on it. Crampons and an ice axe are on the gear list for the Normal Route via SE Ridge for the snow and ice on the upper mountain, along with mountaineering boots that take crampons. Glacier travel also means a rope, harness and crevasse rescue skills. Conditions vary through the season, so check recent reports before you go.
Do you need to acclimatize to climb Castor?
Most people feel the altitude above 8,000 feet, and Castor reaches 13,855 feet. Spend a night or two at elevation first, drink plenty of water and turn back if a headache, nausea or dizziness gets worse.
When is the best time to climb Castor?
The usual climbing window is July to September. Outside it, expect snow, storms or closed access, and check the summit forecast before you go.
Climb Castor with Yak
Plan your route on a topo map, check the summit forecast, then log your climb and see what is left on your list