What is "screwing your shoes"?

It’s inserting short, hex head screws into the lugs in the outsole (ie, the bottom) of the shoe For an excellent write up on how to do this, read Matt Carpenter's webpage, "The Screwed Shoe".

Hawk Hundred - 100/50/26.2 - 2012

Skyline Shuffle 2018

Hawks Ridgeline aid station Heartland100

Trail Hawks Halloween 2010