If this race doesn't get you fired up as a running fan, it's hard to imagine what else would. The half marathon WR holder (Yalemzerf Yehualaw) is racing the 5,000/10,000 WR holder (Letesenbet Gidey) on Sunday in Valencia. Rhonex Kipruto (57:49 pb), 5k world champ Muktar Edris, and Kenyan XC champ Rodgers Kwemoi headline the men's race which saw four men break the WR last year. *MB: Set your alarm clocks now (2:30 am ET Sunday). The women are going for the WR in Valencia. Will we see a 62 minute half?

21-year old Ethiopians Yalemzerf Yehualaw (64:46) and Amedework Walelegn (59:52) both picked up $37,000 wins in event record time today at the Airtel Delhi Half Marathon as Yehualaw ran the second-fastest record-eligible half in history. Muktar Edris ran great in his half debut as well. *MB: Official 2020 Delhi Half Marathon discussion thread

We know Selemon Barega ran 12:43 but in the end decided you can't really be World #1 if you failed to medal at World U20s and the African champs.

2017 is almost over and it's time to look back at the year that was in running. We reflect on the most exciting races of 2017, including history from Emma Coburn and Courtney Frerichs, major marathon wins from Shalane Flanagan and Galen Rupp, the brilliance of Eliud Kipchoge and much more.

With $100,000 on the line per event, Thursday's action should be spectacular.

Little at the 2017 Worlds has been going according to form, except Mo Farah's winning has continued. Will his dominance continue in the 5000 final or will we see another wacky result?

Geoffrey Kamworor is looking to become the 1st man since 2006 to successfully defend his world cross country crown. Can he do it? If he falters, who is likely to win? Can the Americans possibly pick up their first individual medal since Alberto Salazar's silver in 1982? They've certainly got a good chance, particularly if Olympic 5000 silver medallist Paul Chelimo, who is in Uganda ready to race the 10k (but currently only on the 4 x 2k relay), ends up running.

Farah's presence at the top of the podium in Rio was no surprise, but few envisioned Chelimo, who was just 11th at USAs last year, winning America's first Olympic medal in the 5,000 since 1964 and two other Americans cracking the world top 10. *MB: What a year for Team USA! Three American men make our World Top 10 in our 3000/5000 rankings.

Farah cemented his place in Olympic history by joining Lasse Viren as the only man in history to pull off the 5K/10K double at two Olympic Games. Behind him, three DQs saw 41-year-old Bernard Lagat almost win Olympic bronze, but two reinstatements later he was relegated to 5th as USA's Paul Chelimo was the shock silver medalist and Ethiopia's Hagos Gebrhiwet got the bronze.  

Farah looks like a lock for gold after winning the 10k, but with no Kenyans in the final for the first time since 1980, the question is who earns the other medals?

The last Diamond League meet before a month long break features some great mid-d events. In the men's 800, Rudisha faces Pierre-Ambroise Bosse, Ferguson Cheruiyot and Adam Kszczot while Dawit Seyaum is entered in the women's 1500 against Laura Muir and Hellen Obiri. Plus Keni Harrison (100H), Christian Taylor (TJ), Renaud Lavillenie vs. Shawn Barber (PV) & Brittney Reese vs. Tianna Bartoletta (LJ).

Jake Shelley pinch hits for LRC this week. In his preview, he covers Kiprop facing Elijah Manangoi, Taoufik Makhloufi and Nick Willis, who is looking to break John Walker's 34-year-old Kiwi record of 3:49.08, Kiyeng and Kipyegon's WR chances and Norwegian phenom Jakob Ingebrigtsen in the 1500.

The Prefontaine Classic is loaded once again. Meets are much more enjoyable if you know what you are watching, so give us 15-20 minutes and read this 5,000+ word preview. In addition to the world's best from Africa, the meet features US grudge matches of  Jenny Simpson vs. Shannon Rowbury and Drew Hunter vs. Alan Webb.