Swimming at the 1987 Pan American Games – Women's 400 metre freestyle  The women's 400 metre freestyle competition of the swimming events at the 1987 Pan American Games took place on 11 August at the Indiana University Natatorium. The last Pan American Games champion was Tiffany Cohen of US. This race consisted of eight lengths of the pool, with all eight being in the freestyle stroke. All times are in minutes and seconds. The final was held on August 11.