Colliers Way stretches 18 miles (29km) from Bath to Frome
Bumps and holes along a section of cycle path near Radstock in Somerset have been smoothed out using a £12,500 grant from Natural England.
The first quarter-mile of Colliers Way, part of the National Cycle Network, has a loose stone surface.
Sustrans Area Manager Rupert Crosbee said: "This bumpy section can make cyclists feel as though they are shaking their teeth out.
"By smoothing this section we hope to encourage more people to enjoy riding."
Eugene Kertzman, of Somer Valley Wheels, which runs four regular rides each week and has more than 120 participants, said: "This is great news for our riders because this rough, downhill stretch is the first one they have to tackle.
"Smoothing the surface will make it much less daunting."
The Colliers Way stretches 18 miles (29km) from Bath to Frome via the Dundas Aqueduct and will eventually form part of a continuous 81 mile-long (130km) cycle route from Bath to Southampton.