A pod of 60 dolphins swimming and jumping out of the Piako River between Ngatea and Kerepehi made an impressive sight for some council workers on Monday.
Waikato Regional Council works supervisor Ian Sara spotted the dolphins upstream on the Piako River near Kerepehi about 7am as he was driving to a job.
Others spotted them from over bridges at Pipiroa and Ngatea.
Sara estimated the pod had about 60 dolphins heading upstream and travelling at "great pace" before returning around just past Ngatea and heading back to the Firth of Thames.