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 would roll and slide when the competitors stepped on them.
American Ninja Warrior 8
In qualifying, this obstacle proved to be a minor threat, as only a few competitors such as Steven Brickhouse failed it. During the Atlanta finals, the middle block was removed. While it didn't take out any competitors, many competitors did stumble on the obstacle.
American Ninja Warrior 9
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. This time, the obstacle took out several notable competitors, including Brian Kretsch, Ben Melick, Selena Laniel, and Travis Brewer. In the end, it wiped out 13 competitors. However, no competitor failed it in the city finals.
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.
American Ninja Warrior 10
American Ninja Warrior 10's Block Run in Indianapolis
On American Ninja Warrior 10, the Block Run appeared as fourth obstacle in Indianapolis, and the obstacle remained unchanged from the previous season. Being featured in Indianapolis, it coincidentally shared the qualifying course with Cannonball Drop (qualifiers) and the Fly Wheels (city finals), both of which were used in Los Angeles last season.
During Indianapolis qualifiers, the obstacle eliminated several top competitors once again, including Jody Avila, Brandon Mears, and Josh Butler, and quickly became more dangerous than during the past two American Ninja Warrior seasons, as 19 competitors failed on it. Although he was able to clear the obstacle with ease, the first American Ninja Warrior champion, Isaac Caldiero, notably had to take a breath before attempting the obstacle.