NASCAR Denver street race concept.

NASCAR Cup Series: Denver Grand Prix, Laps, 100/220 miles (354.056 km).
NASCAR Xfinity Series: Denver 350, laps, 350/400 miles.
IMSA Michelin Pilot Challenge: Denver sports car classic, laps 75/60 miles.
the founding partners for the race are Pepsi, Wells Fargo, Verizon, and Xfinity.

With NASCAR considering cities for future street races, a circuit in Denver was a option.
20 years after Champ Car visited the Pepsi Center in Denver, motorsport returns to Colorado for a NASCAR street race, on a refreshed circuit at the now Bell Center. The famous back stretch and subsequent hairpin have been retained and now become the front stretch on a challenging course with varied corners.
The lap begins with a flat left hand kink before a heavy braking zone for the super wide Turn 1 hairpin. Pull the car to the left hand side for the tricky T2 with a slightly curved braking zone. Turn 3 is retained from the old layout, and narrows on exit for the long straight along Auraria Parkway.
The most difficult section awaits at T4-7: braking will be incredibly difficult with the kink to the right at Turn 4, then hug the wall through T6 and go all the way to the outside to make Turn 7 as fast as possible. A precise line is essential to get a good run down the longest straight and towards the double left hander at T9-10. T10 narrows on exit before another long straight brings you to the wide Turn 12 hairpin.
Then comes a start stop section crossing the river twice before the final four corners changing direction constantly. Sacrifice is needed to ensure a good run through the open radius Turn 20 and onto the front straight.