I plan to get a P3 advanced this spring. I want to use it in the mountains. I'm often at 9000ft+ How will this drone perform at altitude? Are there any other concerns I should be aware of?

I always fly above 6,000 ft and occasionally above 7,000 ft. Everything works fine.

I flew a P3P at 9,500'MSL this summer in the Colorado Rockies. Temperature was around 70 degrees F. It flew beautifully (to my surprise, actually)!

Look at the specs .... it says ...
Max Service Ceiling Above Sea Level        6000 m

labroides@yahoo Posted at 2015-11-29 16:44
Look at the specs .... it says ...
Max Service Ceiling Above Sea Level        6000 m

And for those in the US, that's 19,685 feet.

Geebax Posted at 2015-11-29 16:20
And for those in the US, that's 19,685 feet.

Thanks guys.
I saw the 5000M max in the specs. I am also quite aware that manufacturers often exaggerate their specs.
I was thinking more about density altitude and stability issues. Especially in wind shear conditions typically encountered at altitude in the mountains.  I'm in Montana and our mountains aren't that different than Colorado. So.... I guess I have no real concerns. Not being a professional with an operating budget, I was just worried about sending all that $$$$ out over the edge where I could never go to retrieve it!
The replies are appreciated.

Mutterranch Posted at 2015-11-30 09:49
Thanks guys.
I saw the 5000M max in the specs. I am also quite aware that manufacturers often exa ...

Density altitude could be a risk, as with most rotorcraft, however I think the Phantoms have sufficient reserve power to cope with it at the sort of elevations you would find in most places in the world. But I would definitely be scared of wind shear, especially if combined with altitude.

In the aviation world, service ceiling is the maximum altitude where it can maintain 100 feet per minute of climb.  I don't know if that crosses over here or not, but I suspect it does.  Your biggest worry will be keeping temperature in your battery at altitude.  Also, the charge life at altitude will probably be shorter, because of more power required to generate lift.  The quad is not like an airplane that generates lift by forward motion.  The higher you go, the more RPM will be required to keep it there.  Be sure to set your battery warning high and head directly home as soon as you get the warning.  Should you lose battery before you get back, it will land (at critical point), or if it is cold, might shut down completely, as has been reported by many others lately in this forum.

Hi ,Mutterranch
The maximum service altitude we claim is 6000 meters . It should meets your need but there's one more thing you need to take care --Low Temperature . And you can check this thread about that .http://forum.dji.com/thread-35249-1-1.html   

DJI-Patrick Posted at 2015-11-30 15:47
Hi ,Mutterranch
The maximum service altitude we claim is 6000 meters . It should meets your need but ...

My Phantom came the other day Updating the firmware was a problem but I finally got it done
Today was it's maiden flight. Outside temp + 15F. Take off altitude 4500ft. Wind 10 - 15 MPH. It flew really well and I got some pretty good video despite my lack of experience. Flight time was about 15 min on a full battery. I can live with that.
Thanks for all the input.

Mutterranch Posted at 2015-12-25 10:55
My Phantom came the other day  Updating the firmware was a problem but I finally got it done
T ...

Nice to hear that ! Looking forward to seeing your videos .