State selection time trials will again provide a prelude to the main program at Ballarat Rowing Association's regatta on Lake Wendouree on Saturday.
Pairs and scullers will race against the clock over 2000 metres from 8am.
Melbourne University, Mercantile and Brighton Grammar School have the bigger representations.
The regatta has attracted 318 entries, with 413 athletes to fill 821 seats in a mix of 1000m and 2000m events
Association administrator Rick Blanchfield said entries were pleasing, being similar to last year with a strong mix of schools and clubs.
He said numbers were always impacted at this time of year by training camps, especially among schools.
Ballarat City Rowing Club has entered 11 boats, including male and female eights.
The Wendouree Ballarat club also has 11 entries.
St Patrick's College, Damascus College and Ballarat High School will represent Ballarat's school community.
While relatively early in the season, the division 1 school fours will generate plenty of interest as crews begin to gauge strengths.
The schoolboys' coxed four division one will see seven crews on the water over 2000m.
Damascus will have three boats, and St Pat's and Brighton Grammar School two each.
The schoolgirls' coxed four division one will go down the course alongside two eights from St Catherine's.
The fours include two Ballarat High and two Damascus crews.
The regatta is scheduled to finish about 4pm after sharing the lake with a Victorian sailing championship.