I'm going to be in 8000 feet to 11000 feet for the next week backpacking. I'm thinking about taking some acid and a few capsules of dmt. I'm not planning on eating pharmahuasca so I was wondering if blasting off (smoking) is going to be any different up in the mountains?

Hmm this could be interesting, only thing I can think of is to be sure to acclimate before dropping the acid and/or blasting off. Look forward to hearing how it goes.

To clarify I'm probably at sea level right now and I'm going to be spending a week in 8000-11000 feet high conditions.

...in which case you'll definitely want to acclimate for a few days; hopefully you're already doing cardiovascular workouts because that will be a big difference in oxygen concentrations.

If it helps, I was at altitude once (15,000ft) for a couple of weeks and it felt like a really bad hangover from about 6000ft onwards. Constant headache, constantly felt sick, night and day. As soon as I started to descend after the trip, the pain went away completely and I felt like I had double the stamina I would at sea level and felt great.