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Zachary Siviglia

M · Age 43 · Roseville, CA

Runner Index

63.8

Local Competitive

Average of your best 3 races in the past 3 years (any distance, by age-graded performance).

#1

California International Marathon

Marathon · 2024-12-08

64.8% AG

#2

Run Rocklin

10K · 2026-04-12

63.9% AG

#3

Run Rocklin

Half Marathon · 2025-03-30

62.8% AG

Predicted Times

Based on your Runner Index — the average of your three best age-graded performances in the last 3 years. Times reflect your peak level, not a typical race day.

5K

21:40

10K

43:57

Half Marathon

01:35:49

Marathon

03:18:05

Races

4

Total Distance

115.5 km

Best Age-Graded

64.8%

Best Distance

Marathon

Overall Podiums

0

Overall Wins

0

AG Podiums

1

AG Wins

1

Trophy Case

🏆

Best Overall Finish

10th Overall at Run Rocklin · 2025-03-30

🥇

Best Age-Graded

64.8%Local Competitive
⚡

Fastest Times

10K: 43:54Half Marathon: 01:36:37Marathon: 03:13:27

Zachary Siviglia

Roseville, CA · Age 43

Runner Index

63.8

Local Competitive

Total Races

4

Total KM

115.5 km

Career Podiums

1

Favorite Distance

10K

PB at Favorite

43:54

Best Year

2025 (2 races)

runclax — Community Local Athletes Index

Personal Bests

10K

43:54

Run Rocklin

2026-04-12

63.9% AG

Half Marathon

01:36:37

Run Rocklin

2025-03-30

62.8% AG

Marathon

03:13:27

California International Marathon

2024-12-08

64.8% AG

Age-Graded Trend

Year by Year

YearRacesBest Age-GradedBest TimeDistance
2024164.8%03:13:2742.2 km
2025262.8%01:36:3763.3 km
2026163.9%43:5410.0 km

Your peers

Runners close to you in age and ability, so you can line up your own little race series.

Race History

RaceDateDistanceTimeOverallAG PlaceAge-Graded
Run Rocklin2026-04-1210K43:5418563.9%
California International Marathon2025-12-07Marathon03:23:41279462.1%
Run Rocklin2025-03-30Half Marathon01:36:3710162.8%
California International Marathon2024-12-08Marathon03:13:27198864.8%