Some great middle distance races with Leo Manzano, Kyle Merber, Donn Cabral, Marielle Hall, Amanda Eccleston, Ashley Higginson and more competing.

Ashley Higginson was 2nd in 4:28.

Ashley Higginson and Rebecca Tracy lead the women's field.

Coburn remains the queen of the steeple in the US but Courtney Frerichs (9:20.92) and Colleen Quigley (9:21.29) both came up big and PR'd in the most important race of their lives to punch their tickets to Rio.

Barring an act of God, Coburn will be on the US team. The question is, who will be joining her on the plane to Rio?

Friday Highlights: In a deep men’s 800 field, Nike pro Wesley Vazquez ran 1:44.75 in the 800 to beat out Florida’s Andres Arroyo (1:45.78) and Penn State’s Isaiah Harris and Brannon Kidder. Chanelle Price won the women’s 800 in 2:01.72 over Cory McGee (2:02.73). Virginia’s NCAA indoor mile champion Henry Wynne kept the momentum rolling in the 1500 here as he got the win in 3:38.35 over Mississippi’s Craig Engels (3:38.82). Ashley Higginson won the women’s race in 4:12.81. *MB: 3:38 1500 at Florida Relays! *MB: Insanely fast 800 at Florida Relays

Friday winners included GB's Lynsey Sharp (800 - 2:00.30), Amanda Eccleson (mile - 4:26.88) as the top-4 broke 4:30, Christina Melian (5000 - 15:48) and Jessica O'Connell running 8:56 in the 3000 to beat Ashley Higginson and Emma Bates. Saturday winners included Amed Bile (7:51), Joel Hubbard (3:58) and Drew Piazza (2:21.97 - 1000).

Two Americans crack the top 10. *LRC Coburn: "In general, [I was happy with 2015]. I wish I could have run a PR; that was a goal that I really wanted."

Alexi Pappas and Ashley Higginson head women's field.

Cabral won the steeple and Mackey the 1500. Robby Andrews and Chanelle Price were both runner-ups in the 800.

Bolas won over Ford Palmer (3:59.30) and Ashley Schneider beat out Heather Wilson (4:33.04) and Ashley Higginson (4:34.32).

Men's field is led by Jordan McNamara, Pat Casey and Mac Fleet while the women's has Heather Kampf, Gabe Grunewald and Ashley Higginson.

The final two sections of the men's 1500 and the men's and women's 5,000s were all cancelled due to a thunderstorm, which meant no races for Robby Andrews, Galen Rupp or Kara Goucher. Manzano won a slow 1500 in 3:38.96 over Wheating (3:39.56), while Rowbury (1500) and Symmonds (800) both had runners go down directly in front of them, messing up their races.

Mark Wetmore's two biggest stars will make their season debuts - Jenny Simpson (800) and Emma Coburn (1,500) - while Kara Goucher (5,000) will run her first track race since 2013 and Mary Cain will look to regain her "teen phenom" label.

Stephanie Charnigo won the mile in 4:31.78 over Ashley Higginson (4:32.31). John Travers won the men's race in 3:59.62.

Emma Coburn was fantastic all season long and nabs the #2 spot in the world.

Coburn ran a very impressive 9:19 in 84-degree heat and now owns three of the top six times in the world this year. Ashley Higginson ran a big PR of 9:27 for second.

Highlights/victories included Harvard's Maksim Korolev (7:51.52) over Darthmouth's Will Geoghegan (7:51.57) in the 3K, BU's Rich Peters in the mile (3:57.27),  Harvard's James Leakos in the 5K (13:51). Highlights from day 1 include Oiselle’s Amanda Winslow running the #3 time in 2014 in the mile with 4:26.28 (field also included World Championships steepler Ashley Higginson in 5th – 4:39) and Providence’s Emily Sisson winning the 3K in 9:00.76.