altitude
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![Picture of Hal Koerner ready for the Hardrock 100](http://trailandultrarunning.com/wp-content/uploads/2012/07/hal-koerner-hardrock-100-2012.jpg)
Hardrock Hal: Pre-Race Interview with Hal Koerner
This Friday at 6am, the 19th running of the Hardrock
![](http://trailandultrarunning.com/wp-content/uploads/2012/06/IMG_0588.jpg)
Race Report: Big Horn 100
I was incredibly excited to attend this years Big Horn Trail Races in Sheridan,
![](http://trailandultrarunning.com/wp-content/uploads/2012/06/Kickin-Ass-on-Hope-Pass-071.jpg)
Kickin’ Ass on Hope Pass: Leadville 100 Ultramarathon Training
At about mile 40 in the Leadville Trail 100 mile ultramarathon, runners hit a
![](http://trailandultrarunning.com/wp-content/uploads/2012/05/15000Basecamp.jpg)
Ultrarunning High: Hypoxico Altitude Training: Part 2
I’ve been sleeping above 10,000ft for two weeks now. Each night, I turn
![](http://trailandultrarunning.com/wp-content/uploads/2012/05/Screen-Shot-2012-05-23-at-5.30.47-PM.png)
The Chemistry of High-Altitude Running
Ever wondered why you breathe harder and faster when you’re working out at
![](http://trailandultrarunning.com/wp-content/uploads/2012/05/IMG_0360.jpg)
Sleeping at 15,000ft: Hypoxico Altitude Training: Part 1
I write these words from an altitude of 15,360 ft. The air is thin here. I am