She described the find as "shocking" and implored people to clean up after themselves, rather than relying on others to be good enough to do the job for them.
"My first reaction was it's meant to be a hangout spot, but why don't you take your rubbish with you when you go?
"It's just a total lack of respect for the environment and the community."
Mountain Biking North Otago president Andrew Milne had no issue with people using the area as a gathering point, but was disappointed by the amount of rubbish being left behind.
"The sofa doesn't bother me at all, but the rubbish is obviously a concern . . . but it's pretty hard to police.
"It's frustrating because it's often volunteers from our club who are cleaning it up."
Waitaki District Council recreation manager Erik van der Spek said questions needed to be asked as to why the couch was there and who was responsible for it.
There were no rubbish bins in the car-park area or on the track, he said.
Mr Milne said the issue did not directly affect the track itself and no similar issues had been noted at Mountain Biking North Otago's other tracks.