This year Lisa Hathaway and The Enormocast's Chris Kalous took the mics at Psicobloc as the returning champions went head to head and climbed fast, fast, fast.

Related:

• Video: Bouldering Nationals 2017 Commentary Highlights
• Video: Making Psicobloc Great Again (Commentary Highlights)
• Video: 2016 USA Sport/Speed Nationals Commentary Highlights
• Video: Legends Only Comp 2016 Commentary Highlights
• Video: 2016 USA Bouldering Nationals: Commentary Highlights