Princeton finished in 6:31.2, followed by Virginia at 6:36.3 and Radcliffe at 6:37.5.
The Radcliffe heavyweights will also face a tough field. Currently No. 6 in the country, the Black-and-White will face a group that includes the five crews ahead of them.
No. 1 Washington, No. 2 California, No. 3 Brown, No. 4 Princeton and No. 5 Virginia are all among the teams competing in the first varsity races.
Princeton, Brown and California each received seeds and were separated from each other in the three heats.
The Black-and-White have fallen to both Brown and Princeton this season, although the races were early in the year.
The Bears rowed to a 6:29.9 while Radcliffe stroked to a 6:34.6 on April 3.
The next week, Princeton edged Radcliffe, 6:40.8 to 6:41.5.
In the EAWRC Sprints, the Crimson placed fourth, well behind Brown, Princeton and Virginia.
Radcliffe's heat will contain Princeton, No. 8 Michigan, No. 10 Michigan St., No. 11 Boston University and No. 12 Oregon St.
The Radcliffe second varsity eight will row in a heat that includes Princeton, Washington, California and Michigan. Washington is seeded in the race.
The varsity fours will face Washington, California, Virginia and Wisconsin. Washington is again the seed in the race.
The races begin today and will run through Sunday.