河床AC

On March 1, 1946, A group of students from "Ginásio Leão XIII", at the time directed by professor Antilhon Ribeiro Soares, met to discuss the founding of a sports club that would take the name of River Atlético Clube.

The club's first game was played on February 15, 1948, a match against Amarantino. River's first goal was scored by Antônio Freire (Freirinho). The game was held in the city of Amarante, and River won 4-3. Almost a month later, on March 12, 1948, there was the so-called 'reorganization' of the club, led by Afrânio Messias Alves Nunes (River's most successful president - 11 titles). In 1948, River disputed the state championship and won it for their first major title. From 1950 to 1963, River won thirteen state titles, with the exception of the 1957 state championship.

In 1977, the club competed in the Brazilian Championship for the first time, finishing in the 41st place. The club competed in the championship again in 1978, finishing in the 69th place, in 1979, finishing in the 83rd place, in 1981, finishing in the 39th place, and in 1982, finishing in the 44th place.

In 2000, River competed in the Copa João Havelange, which was the competition that replaced the Brazilian Championship in that year. The club was in the yellow module (which was that season's equivalent to the second level), and was eliminated in the first stage.

In 2015, the club made the finals of Serie D, played against Botafogo-SP. River lost the first leg 3-2. In the second leg, 40,000 fans were in attendance, which was by far the largest attended match in the league, as both teams played to a 0-0 draw which gave Botafogo the title. Despite losing the finals, River earned a spot in the 2016 Série C.

In the 2016 Serie C, River had a poor campaign, finishing last with only 2/18 wins and being immediately relegated to Serie D.