This Week: Nextel All-Star Challenge (Non-points event)

Where: Lowe's Speedway

SERIES: Nextel Cup

When: 7:30 p.m., Saturday

Track dimensions: 1.5-mile quadoval with 24-degree banking in the corners.

Broadcast: Television FX at 7 p.m.; Radio Motor Racing Network at 7:30 p.m.

Last year's winner: Jimmie Johnson.

Race Format: Open to race winners from 2003 and 2004 season, former series champions and former all-star race winners, plus at least one qualifier from the Nextel Open support race to guarantee at least 20 entries. The race involves three segments: The first lasts 40 laps with the top 20 moving to the second segment of 30 laps. The top 14 then move to the 20-lap finale that determines the winner.

Companion events and schedule: Friday Tailgate 200 (NASCAR Craftsman Truck Series) at 8:30 p.m. (Speed).

Other races: Saturday Hooters 250 (USAR Hooters Pro Cup Series) at Music City Motorplex (7 p.m.); Sunday Goulds Pumps ITT Industries 200 (NASCAR Busch Series) at Nazareth (Pa.) Speedway (1 p.m., FX); 6 Heures du Circuit Mont-Tremlant (Grand Am Road Racing Series) at Quebec, Canada (11 a.m.); Grand Prix of Monaco (Formula One) at Monaco (7:30 a.m., Speed); Monterrey Grand Prix (CART Champ Car Series) at Fundidora Park, Monterrey, Mexico (4 p.m., Spike); Tuesday-- O'Reilly Summer Nationals (NHRA POWERade Drag Racing Series) at Topeka, Kan. (3:30 p.m., ESPN2).