Highest airport you’ve landed a Skymaster?

[CO_Skymaster]

Telluride - 9069 Feet
7100 foot runway
Normal Aspirated Engine
Pilot and 2 passengers (2 men, 1 woman)
October timeframe - Fall, Windy, Afternoon, and temp was I believe in high 70's.

Had the aircraft configured for 1/3 flaps during first take off attempt. I was running out of runway and was uncomfortable with how I was taking off. Aborted the first attempt.

Tried a second time with no flaps. Was able to take of with about 2/3rds of runway length.

Karl