Strolling along the riverside on the Upper West Side has turned into hell on wheels.

The city is months behind on repairing a shuttered stretch of bike path on the Hudson River Greenway, forcing the thousands of cyclists who pedal along it every day to weave and swerve around dog walkers and joggers on the route’s pedestrian path.

“There are people who are biking out here like maniacs, like they’re in the Tour de France. It’s crazy,” said a 36-year-old woman who gave only her first name, Bianca. “They’re all suited up and serious, while there are people out here taking a stroll or just relaxing.

“It’s definitely not safe.”

Upper West Side cyclist Danielle Summers, 32, agreed.

“It’s been chaos down here. The nice weather has brought out so many people and dogs it’s turned this into an obstacle course,” she said, after swerving her hot-pink bicycle to avoid a German shepherd, then narrowly missing a bench.

“It’s only a matter of time before someone gets really hurt. Someone probably already has.”

The city Parks Department closed the bike lane from 59th to 72nd streets in late November to grade and repave it. Bikers had to detour on the pedestrian path.

The agency said in December that the section would reopen in “the next few weeks” but now says it won’t wrap up until next month.

Now the pedestrian path is poised to get even more dangerous as spring heats up and brings out even more cyclists and walkers with their dogs.

The Parks Department says construction was bogged down because such work can be done only on consecutive days when the weather is dry and at least 40 degrees.

Last May, some 5,000 riders used the bike lane every weekday, and the number shot up to more than 7,500 in July, according to city data.

On a recent weekday morning, The Post counted 72 cyclists on the pedestrian path in the space of 10 minutes — and many near-misses.

Dog walkers were carrying their pups to keep them safe.

“I’ve had to really keep my eye out for Sadie,” Ian McGillivray, 28, said, referring to his collie mix, whom he walks daily along the Hudson.

Retirees Andy and May Chang found the traffic distracted from their tai chi exercises near the walkway last week.

“It definitely isn’t conducive to the calm moment we’re trying to have here,” said May, 66.

Andy, 67, added: “They’ve been working on this thing for months . . . How long does it take to pave a bike lane?”