The Canal & River Trust was in Preston last week as part of its care of the city's local waterways.
The group, which runs Towpath Taskforce in the Preston area every month, descended upon the Lancaster Canal in Cadley last Tuesday.
David Tremble, craft operative at the Trust, said: “The canal is a beautiful place and we know that people who visit are healthier and happier.
"Our staff and wonderful volunteers spend a lot of time to keep it that way for local people to use and enjoy, so it’s a real shame when people don’t take responsibility for their rubbish."
Most of the rubbish found was discarded cans and plastic bottles as well as food packaging - and even an abandoned scooter.
David added: "Litter is not only an eyesore but could be harmful for waterway wildlife, so please keep hold of your rubbish until you come to a bin or get back home.
"It will make a huge difference for everyone who uses the canal and towpath and allow us to spend more time improving the area by doing things like repairing towpaths, painting locks and planting flowers.”
New volunteers are always welcome in the Towpath Taskforce activities across Lancashire, and there are many jobs to get involved in. Find out more and sign up at https://canalrivertrust.org.uk/volunteer