http://www.ultrarunning.com/featured/coping-with-altitude/?utm_source=Weekly+Newsletter&utm_campaign=5d84e58dd1-Weekly+Newsletter&utm_medium=email&utm_term=0_1577fa00f6-5d84e58dd1-96635349 http://semi-rad.com/2014/06/the-lost-art-of-dreaming-over-maps/ http://mrtrailsafety.blogspot.com/2011/07/so-you-want-to-pace.html?q=so+you+want+to+pace http://www.leadvilleraceseries.com/2014/06/dispatches-from-leadville-climbing-tips/ http://leadvilletoday.com/2014/06/19/latest-news-june-20-fri/ http://www.wser.org/how-it-all-began/ http://www.backpacker.com/may_2005_feature_scott_williamson/articles/8846