Bradford City footballer Matty Foulds will kick off the home kart racing event at 11am while activities continue until the early evening.
The free event, commissioned and sponsored by the Bradford Business Improvement District (BID), is expected to draw crowds of around 20,000.
The thrilling race will see more than 20 teams race past the crowds.
But what is the full Bradford Super Soapbox Challenge route and where can you watch it?
Bradford Super Soapbox Challenge Full Course
The team ‘pits’ will be based at the bottom of Westgate and races will start from a ramp on Kirkgate, near the Bradford Mechanics Institute.
The route skirts Kirkgate before turning right into Bank Street, then right again into Tyrrel Street before finishing at the bottom of Ivegate.
The entire course will have safety fencing and hay bales to protect participants and spectators.
Where are the pits?
The team pits will be based at the bottom of Westgate.
Road closures due to Bradford Super Soapbox Challenge
Certain roads in the city center will be closed to vehicles from 11 a.m. on Saturday April 30 to 11 p.m. on Sunday May 1.
These road closures include the full lengths of Ivegate, Upper Millergate, Kirkgate, Queensgate, Hustlergate and Piece Hall Yard; Westgate, from its junction with Godwin Street to its junction with Kirkgate; Bank Street from its junction with Darley Street to its junction with Market Street; and Darley Street, from its junction with Godwin Street to its junction with Bank Street.