Jack Cosby

Bib: 51351 M GB

0:00

0:00

/ mi

Be the first to cheer!

Overall

#0 / 59786

Top 7%

Gender (Male)

#0 / 33594

Top 11%

Division (M18-39)

#0 / 16712

Top 14%

Race Day Weather

56°/46°F

overcast clouds

Race Timeline

Ribbon color based on

FasterSteadySlower· vs. your average pace

Start

0:00

Race begins

131 ft elev

5K· 3.11 mi

7:15/mi

22:31

↑ 49 ft↓ 125 ft0.5% grade

54 ft elev

10K· 6.21 mi

7:10/mi

44:44

↑ 50 ft↓ 81 ft0.2% grade

24 ft elev

15K· 9.32 mi

7:27/mi

1:07:50

↑ 44 ft↓ 51 ft

18 ft elev

20K· 12.43 mi

6:54/mi

1:29:16

↑ 67 ft↓ 40 ft0.2% grade

45 ft elev

Half· 13.10 mi

6:58/mi

1:33:56

↓ 27 ft0.6% grade

25 ft elev

25K· 15.53 mi

7:00/mi

1:50:57

↑ 50 ft↓ 63 ft0.1% grade

12 ft elev

30K· 18.64 mi

7:08/mi

2:13:05

↑ 69 ft↓ 46 ft0.1% grade

35 ft elev

35K· 21.75 mi

7:10/mi

2:35:19

↑ 87 ft↓ 88 ft

34 ft elev

40K· 24.85 mi

7:01/mi

2:57:05

↑ 58 ft↓ 75 ft0.1% grade

17 ft elev

Finish· 26.22 mi

6:54/mi

3:06:29

↑ 14 ft↓ 18 ft

19 ft elev

Course Elevation

503ft

Total climb

166ft

Range

6 to 172 ft

613ft

Total descent

About the height of the Statue of Liberty

See every mile of your race

Claim this result to add your watch's GPX and unlock per-mile pace, heart rate, and grade — mile by mile on this timeline.

Works with Garmin, Apple Watch, Strava, COROS, Suunto & more.

The Course

Half Splits

1st Half· via Half

1:33:567:11 /mi+1.5%

2nd Half

1:32:337:04 /mi✓ faster

Negative split — 1.5% faster in the second half

AI Race Performance Report

Jack's race, broken down like a coach

The full Race Story, performance analysis, segment & passing breakdowns, and where the race turned. Free to unlock — for anyone.

Free account · no payment

Checkpoint Splits

Checkpoint	Time	Avg Pace	Segment Length	Segment Time	Segment Pace	Diff
5K	22:31	7:15	3.11 mi	22:31	7:15	-
10K	44:44	7:12	3.10 mi	22:13	7:10	-0:05
15K	1:07:50	7:17	3.11 mi	23:06	7:27	+0:17
20K	1:29:16	7:11	3.11 mi	21:26	6:54	-0:33
Half(13.10 mi)	1:33:56	7:11	0.67 mi	4:40	6:58	+0:04
25K	1:50:57	7:09	2.43 mi	17:01	7:00	+0:02
30K	2:13:05	7:09	3.11 mi	22:08	7:08	+0:08
35K	2:35:19	7:09	3.11 mi	22:14	7:10	+0:02
40K	2:57:05	7:08	3.10 mi	21:46	7:01	-0:09
Finish(26.22 mi)	3:06:29	7:08	1.37 mi	9:24	6:54	-0:07

Trend:

Faster pace

Steady pace

Slower pace

More below

See the rest of Jack's race

Checkpoint splits, rankings, passing analysis and qualifying. One free sign-in reveals them here — and on every race you look up.

Checkpoints & Pacing

Pace Line

Fastest Pace

6:54 /mi

Average Pace

7:07 /mi

Slowest Pace

7:27 /mi

Loading chart...

Fastest

Middle

Slowest

Average

Segments

Time at Faster Pace

2:20:52

76% of race

Time at Steady Pace

45:37

24% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:07 /mi

Loading chart...

Faster pace (< avg)

Steady pace (≈ avg)

Slower pace (> avg)

Heatmap

0mi6.6mi13.1mi19.7mi26.2mi

Pace:

Faster

Steady

Slower

Checkpoint and Segment Rankings

Checkpoint	Seg. Dist	Overall	Males	M18-39	Seg. Overall	Seg. Males	Seg. M18-39
5K	3.11 mi	7165	6148	6148	6811	5874	5874
10K	3.10 mi	6643+522	5771+377	5771+377	6262	5493	5493
15K	3.11 mi	6695-52	5802-31	5802-31	6811	5874	5874
20K	3.11 mi	6167+528	5419+383	5419+383	4882	4438	4438
Half(13.10 mi)	0.67 mi	6058+109	5336+83	5336+83	4097	3779	3779
25K	2.43 mi	5779+279	5123+213	5123+213	4678	4240	4240
30K	3.11 mi	5396+383	4809+314	4809+314	4286	3886	3886
35K	3.11 mi	4960+436	4430+379	4430+379	3725	3363	3363
40K	3.10 mi	4475+485	4001+429	4001+429	2762	2506	2506
Finish(26.22 mi)	1.37 mi	4267+208	3822+179	3822+179	2430	2183	2183

2183

Passing Analysis

No position changes recorded for this athlete.

All Results

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support

Public Race Data

Enhanced athlete results built from publicly available data.

Race managed by

London Marathon Events

Race timed by

Mika Timing