Edenhope College class of 1994 reunited 20 years after finishing school.

Former student and Edenhope Cup treasurer Sara McDonnell said everyone who was in the year level from prep to year 12 was invited.

The class was the first year 12 class of Edenhope P-12 College following the amalgamation of Edenhope Consolidated School and Edenhope Secondary College in 1994.

The reunion included a day at the races, dinner and a tour of the school.

"It was great to catch up with everyone," Mrs McDonnell said.

"A few teachers came as well which was good."

Mrs McDonnell said social media helped get in touch with everyone.

"There were a few people we had to chase up but through Facebook it was easier," she said.

"Most people were in touch with others. There were a few who didn't have Facebook, but were in contact with someone who did."

People travelled from across the country for the reunion.

"One of the organisers was from Queensland," Mrs McDonnell said.

"A few came from Adelaide, some from Melbourne, Mt Gambier, Hamilton and Naracoorte."

It was the first time the class had reunited since 1994.

"We never had a 10-year reunion so it was great to see everyone again," Mrs McDonnell said.

"Being a long weekend helped as well because more people could come."

She said they chose the Edenhope Cup to celebrate because it was such an ideal location.

"It's a great spot we were able to have our own marquee, so there was plenty of space for people to come and have a chat," she said.

Mrs McDonnell said she believed it would be the first of many reunions.

The class isn't the only one celebrating 20 years, with Edenhope College celebrating the amalgamation of Edenhope Consolidated School and Edenhope Secondary College.

The celebration will be at the college on March 28 from 4.30pm.

It will include stalls, memorabilia, games and music.

Organisers said tickets were $20 each for families or $5 each for individuals.