Brandon;
Was alcohol involved in this ‘trick’ 😉
Living where you do and having easy access to higher altitude training is good and you should definitely try to do a few of your weekly runs at 10,000+ feet especially the long ones. Spending hours there will definitely help on race day. Sleeping a bit lower should allow you to recover well from the higher training days.

Pure speed will not be such an important quality to train so the fact that you will be moving much slower at 12k on these training days is not going to coast you on race day.

Scott

AT skiing is great general training but running puts a whole new load on the legs due to the eccentric contraction with each foot strike. It is easy for skiers who are coming off a big ski season very fit to get injured when they jump into running to long to early. You need to get some miles in those legs over the next few weeks. But doing a long ski day 1x/week is fine.

Scott

Brandon,
This would be a situation where a hypoxic tent would help you acclimate to these (relatively) moderate altitudes of your race compared to your living/training elevation. That said, you also have access to plenty of altitude right around you too.

You should do anything that requires any kind of intensity at lower elevations for quality of workout. Long duration/low intensity (such as the skis) are perfect times to go up high in the mountains around the roaring fork.

Here’s the article about the normobaric hypoxic tents

Training, Oxygen Systems, and Hypoxic Tents

good luck,
Steve