World Road Running Championships Half Marathon 2023: American Results

Varies by edition

Explore recorded American finishes and follow each runner's race history. 6 recorded results have linked sources. These records do not establish a complete elite field or official American finishing order.

Riga 2023: Grabill and Simbassa lead the U.S. half-marathon team

Molly Grabill finished 13th in a personal-best 1:09:53, according to USATF’s championship report. Biya Simbassa led the American men in 25th in 1:01:28; Futsum Zienasellassie was 33rd in 1:01:49. The half marathon was one of several distances contested in Riga, so these performances should be compared within their own event.

USATF’s Riga 2023 championship report

AI-assisted recap · Checked against the linked sources on 2026-10-21

World Road Running Championships Half Marathon: race context

The World Road Running Championships include races at several distances. These pages cover the half marathon only: the 2023 edition was in Riga and the 2026 edition was in Copenhagen. Mile and 5K performances are excluded from these tables.

Race information and sources · USATF’s Riga 2023 report

U.S. men's recorded results

Recorded U.S. athlete results ordered by time within this site's athlete subset; not official finishing positions
Subset order	Athlete	Time	Race	Date	Evidence
1	Abbabiya Simbassa	1:01:28	World Athletics Road Running Championships	Oct 1, 2023	Result source for Abbabiya Simbassa
2	Futsum Zienasellassie	1:01:49	World Athletics Road Running Championships	Oct 1, 2023	Result source for Futsum Zienasellassie
3	Jacob Thomson	1:02:26	World Athletics Road Running Championships	Oct 1, 2023	Result source for Jacob Thomson
4	Reed Fischer	1:03:56	World Athletics Road Running Championships	Oct 1, 2023	Result source for Reed Fischer

U.S. women's recorded results

Recorded U.S. athlete results ordered by time within this site's athlete subset; not official finishing positions
Subset order	Athlete	Time	Race	Date	Evidence
1	Molly Grabill	1:09:53	World Athletics Road Running Championships	Oct 1, 2023	Result source for Molly Grabill
2	Amber Zimmerman	1:12:26	World Athletics Road Running Championships	Oct 1, 2023	Result source for Amber Zimmerman

These are recorded results for the marathoners covered by this site, including historical athletes outside the current rankings. Marathon and half-marathon results are kept separate. This is a view of our recorded athlete histories, not the complete race field. Table order compares the recorded times within each sex; it is not official race placing or an exhaustive American ranking. Gun and chip times may appear together; chip times are labeled. Read the coverage and timing methodology.

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