I think you'll be just fine. The High Passes trek isn't difficult and by starting at Jiri you are actually helping the acclimatisation process rather than beginning at Luka. This trip is also good for acclimatisation as it goes high, then low, then high, etc. The elevation gain towards the first high pass, the Kongma La, is gradual and you will spend at least two nights at Namche to get used to the 3,000m+ atmosphere. Drink heaps (water and tea), and then more (until your pee is gin clear). If you don't remain hydrated you will get an oedema. But if you remain hydrated, nourished and healthy you should be fine. After you have completed the first high pass you'll have loads more red blood cells to carry the oxygen through the system and you should find that the trek to EBC (if you are popping in for a look), the Cho La and the Renjo La are easy and enjoyable. Once your body is used to the height things get much easier (I once ran from near Island Peak Base Camp down to Namche in seven hours which normally takes four or five days on the way up). But this high altitude thing can bring people unstuck who want to show off and try to be the quickest etc - it is better to be the last into camp each day (within reason), for instance marathon runners tend to pop at altitude and can suffer from potential life threatening issues. So if you try to stroll along on the way up, have lots of stops to take photos and drink you'll be fine plus you've probably seen that the days aren't very long on this trek so there is no need to rush anyway. Normally you'll get into the village in the early arvo, have some lunch, then do a slow acclimatising walk up a nearby hill. It's all very relaxing really. Also don't train too hard in the weeks leading up to the trip, and make sure you have a bit of fat on you before you go to altitude (I've lost up to 20kg on some of these trips). Hill walking is probably the best training. If you need any further info PM me. Good luck and enjoy.
Moondog55 wrote:Might be an idea to spend some time at one or other of the ski resorts too, it's only 1500 meters but it helps
No need. It won't assist in any way. Plus Kathmandu is about that height anyway.