BERGEN COUNTY, N.J. — Bergen County officials are investigating a half marathon that sent runners through waist-high floodwaters Sunday morning, with the race taking place on the second day of Rosh Hashanah.

The Racefaster Half Marathon began at 8 a.m. and took runners through portions of Saddle River County Park as more than 5 inches of rain fell in parts of the region over several hours.

Videos posted to social media showed runners wading through deep, fast-moving water beneath an overpass. Footage credited to runner Zac Clark appeared to show water reaching runners' waists, with some runners holding onto railings as they made their way through the flooded section.

Bergen County was not an organizer or sponsor of the race.

The county had issued Paramus-based Racefaster a permit to use portions of the park, but county officials said they advised the organizer to use an alternate route to avoid the flooding.

Multiple runners nevertheless used the original route.

Some participants told News 12 they were unaware an alternate route had been established and questioned why the race continued despite the heavy rain and flooding.

The county is now investigating whether Racefaster complied with the conditions of its permit and whether runners entered restricted areas.

Racefaster has been placed on probation by the Bergen County Park Department's permitting office and will not be permitted to hold races in Bergen County parks for at least one year.

"The County issued a permit allowing the organizer to use portions of the park, but responsibility for the planning, management, and operation of the race rested with the private organizer," county spokesperson Derek Sands said.

Sands said county parks personnel advised Racefaster to use an alternate route.

The county will also review the conduct of race participants who "entered county park ponds and other restricted areas," according to Sands.

Racefaster did not respond to requests for comment as of Tuesday morning.

The investigation comes after a weekend of severe weather that caused widespread flooding across Bergen County and North Jersey.