Sergio Alfonso

SpainSpainActive
Born
Mar 9, 2001 (25 years old)
Events
10 Kilometres Road · Half Marathon

Sergio Alfonso is a Spain long-distance runner, born on March 9, 2001. He competes primarily in the 3000m, 10000m and Semi.

His personal bests include 8:52.75 in the 3000m, 31:27.73 in the 10000m, 1:08:26 in the Semi, 14:54 in the 5Kilometre and 8:52.75 in the 3000m-short-track. He is currently active on the international athletics circuit, representing Spain.

Personal best · 10 Kilometres Road30:37
2026 season best30:37Jan 11, 2026 · Valencia
2026 season best
Personal best · Half Marathon1:08:26
Last competitionSpanish Road Running Championships - Mile, 5km and Half MarathonApr 12, 2026 · 15:25
Spanish Road Running Championships - Mile, 5km and Half Marathon

As of Nov 13, 2026: 10 Kilometres Road 30:37, Half Marathon 1:08:26, 2026 season best 30:37 (Jan 11, 2026, Valencia (ESP)) · Last competition: Spanish Road Running Championships - Mile, 5km and Half Marathon, Apr 12, 2026, 15:25 · 25 years old

Personal bests

WA points calculator →
DisciplineResultAll-time
3000mIndoorValencia 20248:52.75786 pts–
10000mBurjassot 2023Spain 10 000 m all-time list31:27.73835 pts–
SemiValencia 2025Spain Half Marathon all-time list1:08:26871 pts–
5KilometrePollensa 202514:54–
3000m-short-trackIndoorValencia 20248:52.75786 pts–
3000m-short-track20218:57.39762 pts–

Progression

SeasonDisciplineResultWindDateCompetitions
20265Kilometre 15:25–Apr 12, 2026Spanish Road Running Championships - Mile, 5km and Half Marathon
202610Kilometr 30:37–Jan 11, 202610K Valencia Ibercaja by Kiprun
2026Semi 1:09:43–Jan 25, 2026Medio Maraton Sevilla
20255Kilometre 14:54–May 17, 2025Spanish Road Running Championships - Mile, 5km and Half Marathon
2025CrossCount 22:45–Nov 23, 2025Cross Internacional de Atapuerca, Centro de Arqueologia Experimental, Atapuerca - XC 6.821km
202510Kilometr 31:22–Jan 12, 202510K Valencia Ibercaja by Kiprun, Valencia
2025Semi 1:08:26–Oct 26, 2025Medio Marathon Valencia Trinidad Alfonso Zurich
20243000m Indoor8:52.75–Feb 3, 2024Valencia Indoor Championships, Velódromo Luis Puig, Valencia (i)
FAQ

Frequently asked questions

Sergio Alfonso's 10 Kilometres Road personal best is 30:37, set on Jan 11, 2026 in Valencia (ESP).

Sergio Alfonso competes in the 10 Kilometres Road and Half Marathon.

2026 season best: 30:37, set on Jan 11, 2026 in Valencia (ESP). Last competition: Spanish Road Running Championships - Mile, 5km and Half Marathon on Apr 12, 2026, 15:25.