In the women's half, Molly Huddle and Jordan Hasay take on US soil record holder Mary Wacera (66:29) and Edith Chelimo (65:52). Alex Korio Oloitiptit (58:51) leads a men's half field with Olympic silver medalist Feyisa Lelisa, Callum Hawkins, Stephen Sambu, Diego Estrada, Sam Chelanga, Luke Puskedra, and Bernard Lagat. In the men's marathon, defending champ Dominic Ondoro takes on Bazu Worku (2:05:25) while last year's women's half winner Veronicah Nyaruai Wanjiru makes her marathon debut against Mamitu Daska (2:21:59).

The men's field is lead by World steeple 5th placer Stanley Kebenei and Boilermaker 15K champ Silas Kipruto while Diriba will face World Half bronze medalist Mary Wacera in the women's race.

The men's field is lead by World steeple 5th placer Stanley Kebenei and Boilermaker champ Silas Kipruto while Diriba will face World Half bronze medalist Mary Wacera in the women's race.

In our preview, we focus much of our attention on American hopefuls Scott Fauble and Luke Puskedra, both of whom took fourth at the Olympic Trials last year.

Two-time World Half Champs medallist Mary Wacera headlines the field, which also includes Kellyn Taylor, Aliphine Tuliamuk, Sara Hall and Jordan Hasay.

Salel won in 1:03:13 and Wacera 1:10:19 as both had some interesting post-race quotes with Salel saying he loves Boston so much he should look for an apartment there and Wacera talking about latching on to a sub-elite male runner to help her with the pace.

Salel will face Silas Kipruto (59:39) and Daniel Chebii (59:49) while the women's race has Diane Nukuri (69:12).

They'll face a deep field which includes Atsede Baysa, Mary Wacera, Edna Kiplagat and Kim Smith. On the men's side, Geoffrey Mutai will face Dathan Ritzenhein, Abdi Abdirahman and Daniel Salel.

Laura Thweatt is the top American while the men's field is lead by NYC Half runner-up Wilson Chebet, NZ's Zane Robertson with Scott Bauhs leading the US charge.

Kenya put up a historic 1-5 sweep two years ago. Can they do it again in Cardiff? Which Kenyan stud will be the winner? Can the US snag the bronze led by Olympic Trials top 6 placers, Kellyn Taylor and Janet Bawcom?

What a week. In the WTW, we give Ryan Hall some more praise, introduce you to Sammy Wanjiru's wife, who just ran one of the greatest races ever on US soil, tell you why Jenny Simpson's and Matthew Centrowitz's gold medal dreams just took a hit, and break down the fast and slow half marathons for Puskedra and Estrada.

Mary Wacera was the women's winner in 66:29 as Sara Hall was the top American in 70:07 for 5th. Ethiopians Gebo Burka (2:10:54) and Biruktayit Degefa (2:26:07) were the winners in the full.

$30,000 for both of them for a little over an hour's work.

Stephen Sambu was 2nd 12-seconds back as Leonard Korir took 3rd and Geoffrey Mutai was back in 7th (28:53). Wacera won over Edna Kiplagat by 8-seconds. *Results

Leonard Korir and Abdi Abdirahman are also in the field. The women are led by Joyce Chepkirui who faces Mamitu Daska, Mary Wacera, Gladys Cherono and Gemma Steel.

Sambu finished 8-seconds ahead of runner-up Jacob Riley and other top Americans included Girma Mecheso (5th), Jared Ward (10th) and Luke Puskedra (12th). For the women, Wacera was given the same time as runner-up Cynthia Limo while Wichita State alum Aliphine Tuliamuk-Bolton was a distant 3rd. Serena Burla was the top American in 6th while Megan Goethals and Juliet Bottorff were 8th and 9th. Jen Rhines was the top master in 16th.
*MB: Cherry Blossom 15K The course was short as it had to be changed at the last minute due to a car accident.

On the men's side Desisa will be up against Stephen Sambu, Leonard Korir and last year's runner-up Daniel Salel. Huddle faces BAA 10K champ Mamitu Daska, Betsy Saina, Linet Masai and 1:07:44 runner Mary Wacera.