The Jiri route is harder than the standard Everest Base Camp trek, mainly because of the extra days and the repeated climbs between about 1,500 m and 3,500 m. The altitude stays moderate for the first week, so the main challenge is stamina, not height.
Stamina first
Expect six to eight hours of walking on most days, and long ups and downs that add up to thousands of metres of climbing. By the time you reach Lukla you will be fitter, but you will also be tired. Build fitness well before you leave.
Altitude
The altitude stays below about 3,600 m until you reach the Khumbu. After Namche the trip follows the usual profile and the usual altitude rules: sleep low, rest every third night and watch for symptoms.
Terrain
Trails are earthen, rocky and steep in places. Rain makes them slippery, and leeches can be present in the lower sections in the monsoon. Good boots and trekking poles help a lot.
Health and safety
There are fewer clinics on the walk-in than in the Khumbu. Carry a basic medical kit, keep up your water intake, and tell your guide about any problem early.
Who should avoid it
Trekkers who are short on time, or who are not used to long days, should consider the Lukla route instead.
How to train for ridge days
Train with long hill walks and stairs, carrying a small pack. Practise going downhill, because descents hurt knees on a route like this. Trekking poles help a great deal.
Packing for two climates
You will go from warm, humid hills to cold high valleys. Bring layers, a rain jacket, sun protection for the lower days and a warm jacket for Gorak Shep and Kala Patthar.
Plan it
See the Jiri versus Lukla comparison and the itinerary.
