Here’s your traffic guide for the Rock ‘n’ Roll marathon this weekend

Unless you're wearing running shoes or support somebody who does, you probably won't want to be anywhere near the Las Vegas Strip on Sunday afternoon and evening.

The two-day, four-race Rock 'n' roll Las Vegas Marathon and Half Marathon, sponsored by Geico, makes its 2015 appearance this weekend with three race events Sunday and one Saturday night along the renowned resort corridor.

It will result in the largest series of street closures for a private event in Southern Nevada.

"For our runners, this is a unique experience, running when the sun goes down and the lights of the Strip are coming up," said Dan Cruz, a spokesman for the Rock 'n' Roll Marathon Series.

Cruz said 45,000 people are registered to run in the four races, including 34,000 for Sunday's marathon.

The event annually generates an estimated $165 million in economic impact on Southern Nevada.

Since 2009, more than $20 million has been raised by the Crohn's & Colitis Foundation of America at the Las Vegas event.

On Sunday, a 10-kilometer race begins at 4 p.m., while the marathon and half-marathon start at 4:30 p.m. Those events will be preceded by a pre-race concert by five-time Grammy nominee Kid Rock at 3 p.m.

During Sunday's featured events, the 26.2-mile marathon and 13.1-mile half-marathon, there will be rolling closures on various streets, including Las Vegas Boulevard, from 2:30 p.m. to 11:30 p.m.

Traffic won't be allowed to cross the boulevard until runners have cleared the area and Regional Transportation Commission buses serving the Strip will be detoured during the race.

The races will affect other streets in Las Vegas and a small portion of North Las Vegas and some freeway exits will be closed when runners are in the vicinity.

The marathon and half-marathon will begin in front of Mandalay Bay and the finish line will be in front of The Mirage. There will be a five-hour time limit for the marathon and a four-hour limit for the half. Top marathon runners are expected to arrive at the finish line by 7 p.m., with half-marathon finishers getting there by 6.

Las Vegas Boulevard will be closed from Mandalay Bay to Ogden Avenue at various times. A detailed list of the times of closures and interactive maps and guides for how to access Strip and downtown resort properties are available at the event's website, runrocknroll.com.

Several Interstate 15 freeway ramps will be affected Sunday: 

• The northbound and southbound I-15 ramps to eastbound Spring Mountain Road will be closed 2:30-9:30 p.m.
• The southbound I-15 ramp to eastbound Sahara Avenue will be closed 2:30-10:30 p.m.
• The northbound I-15 ramp to eastbound Charleston Boulevard will be closed 2:30-10 p.m.
• The northbound and southbound I-15 offramps to eastbound Tropicana Avenue will be closed 3:30-8 p.m.
•  The northbound and southbound U.S. Highway 95 ramps from Martin Luther King Boulevard will be closed 4-9:30 p.m.
• The southbound I-15 ramp from Martin Luther King will be closed 4-9:30 p.m.

Routes for two races will be altered from last year's courses. The marathon and half-marathon routes will use only a small portion of Fremont Street, which should maintain better access to downtown hotels during the race. Downtown business owners complained that their properties were blocked when the 2014 races were run.

The other route change will occur with Saturday's 5-kilometer race sponsored by the SLS Las Vegas. Instead of blocking a lane of Las Vegas Boulevard, the entire race will be run on the Rock in Rio Festival grounds and on portions of South Industrial Road and South Bridge Lane.

Northbound Industrial, from Sahara Avenue to Echelon Resort Drive, and eastbound Bridge Lane from Industrial to Sahara, will be closed Saturday at 5:30 p.m., and reopened at 8 p.m. The 10K race Saturday begins at 6 p.m.

The marathon route and time might also affect patron traffic leaving the Smith Center for the Performing Arts. The musical "God Lives in Glass" begins in Reynolds Hall at 3 p.m. By the time the event ends, marathon runners should be in the vicinity of the Smith Center.

Organizers of the races are encouraging spectators to use the Las Vegas Monorail to access different locations on the course. They've also developed a partnership with the ride-hailing company Lyft for discounted rides around the route area.

Pedestrians viewing the race are being told to use the seven pedestrian walkways over the Strip.

Contact Richard N. Velotta at rvelotta@reviewjournal.com or 702-477-3893. Find him on Twitter: @RickVelotta