The phrase "a series of switchbacks" is correct and usable in written English.
It can be used to describe a road or path that has many sharp turns, often found in mountainous areas.
Example: "The hike was challenging, as we had to navigate a series of switchbacks to reach the summit."
Alternatives: "a sequence of hairpin turns" or "a set of zigzag paths".
Ascending ever higher on a series of switchbacks, we stopped to admire the views -- and catch our breath.
A series of switchbacks means I find myself looking back on the ground I've covered, and it's satisfying to see how quickly I'm gaining altitude.
The road from Sichuan is not as high, but also not as smooth: a series of switchbacks, often blocked by rock slides, with rain, snow and lorries posing additional hazards.
A series of switchbacks led us through a forest of sisal plant with monstrous flower spikes, and as the vertiginous and very narrow path curled up the sheer cliffs, the views grew more astounding.
A mandatory walk beckons from the edge of the harbor and follows a paved road through a series of switchbacks to the top of Monte da Guia, one of the twin peaks that guard the harbor.
The road winds through dense forest, up a series of "switchbacks" (hairpin bends) to an incredible viewing point where you can see into Canada and, on a clear day, the snow-topped Mount Baker volcano visible in the distance.
Just before reaching the lot, turn right into a wooded area and then right onto North Road, which descends a series of switchback curves through mixed hardwoods, white pine, dogwood and scrubby brush.
Halfway round the Freeminer Trail, I stopped at the top of a series of tight switchbacks.
A series of punishing switchbacks, and I can see daylight on both sides.
We continued to the town of Kalbajar, ascending a 6,500-foot 6,500-foota a series of steeplateauhbacks.
As we crept up a series of steep switchbacks, a bull elk, with five points on each side of his massive antlers, stepped out of the lodgepole pines near the top of the pass.
