ANW8 Block Run

American Ninja Warrior 8's Block Run in Atlanta

The Block Run is an obstacle, firstly introduced as the third obstacle on American Ninja Warrior 8 in Atlanta. Competitors must run across 5 tilted cubes on a horizontal pole that roll and slide under the competitors' feet.

During Atlanta finals, the middle block was removed. While it didn't take out any competitors, many competitors did stumble on the obstacle. 

ANW9 Block Run

American Ninja Warrior 9's Block Run in Los Angeles

The Block Run returned on American Ninja Warrior 9, as the fourth obstacle in Los Angeles. However, the number of blocks was increased to 6, and each block varied in size. Although only 13 competitors failed on this obstacle during Los Angeles qualifiers, it eliminated 4 top competitors: Brian KretschBen Melick, Selena Laniel, and Travis Brewer.

CNW Block Run

The Block Run during Celebrity Ninja Warrior: Red Nose Day

This version of the Block Run was attempted early during Celebrity Ninja Warrior: Red Nose Day. Among the 9 celebrity competitors who attempted it, only Natalie Morales and Nikki Glaser failed.