Gemma Jackson

Bib: 46434 F GB

0:00

0:00

/ mi

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Overall

#0 / 59786

Top 28%

Gender (Female)

#0 / 26115

Top 17%

Division (F18-39)

#0 / 14744

Top 19%

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

8:16/mi

25:41

↑ 49 ft↓ 125 ft0.5% grade

54 ft elev

10K· 6.21 mi

8:26/mi

51:53

↑ 50 ft↓ 81 ft0.2% grade

24 ft elev

15K· 9.32 mi

8:29/mi

1:18:13

↑ 44 ft↓ 51 ft

18 ft elev

20K· 12.43 mi

8:26/mi

1:44:25

↑ 67 ft↓ 40 ft0.2% grade

45 ft elev

Half· 13.10 mi

8:52/mi

1:50:22

↓ 27 ft0.6% grade

25 ft elev

25K· 15.53 mi

8:46/mi

2:11:41

↑ 50 ft↓ 63 ft0.1% grade

12 ft elev

30K· 18.64 mi

9:16/mi

2:40:26

↑ 69 ft↓ 46 ft0.1% grade

35 ft elev

35K· 21.75 mi

9:42/mi

3:10:33

↑ 87 ft↓ 88 ft

34 ft elev

40K· 24.85 mi

9:12/mi

3:39:06

↑ 58 ft↓ 75 ft0.1% grade

17 ft elev

Finish· 26.22 mi

8:54/mi

3:51:13

↑ 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

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The Course

Half Splits

1st Half· via Half

1:50:228:26 /mi⚡ faster

2nd Half

2:00:519:13 /mi+9.5%

Positive split — 9.5% slower in the second half

AI Race Performance Report

Gemma'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.

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Checkpoint Splits

Checkpoint	Time	Avg Pace	Segment Length	Segment Time	Segment Pace	Diff
5K	25:41	8:16	3.11 mi	25:41	8:16	-
10K	51:53	8:21	3.10 mi	26:12	8:26	+0:10
15K	1:18:13	8:24	3.11 mi	26:20	8:29	+0:03
20K	1:44:25	8:25	3.11 mi	26:12	8:26	-0:03
Half(13.10 mi)	1:50:22	8:26	0.67 mi	5:57	8:52	+0:26
25K	2:11:41	8:29	2.43 mi	21:19	8:46	-0:06
30K	2:40:26	8:37	3.11 mi	28:45	9:16	+0:30
35K	3:10:33	8:46	3.11 mi	30:07	9:42	+0:26
40K	3:39:06	8:49	3.10 mi	28:33	9:12	-0:30
Finish(26.22 mi)	3:51:13	8:50	1.37 mi	12:07	8:54	-0:18

Trend:

Faster pace

Steady pace

Slower pace

More below

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Checkpoints & Pacing

Pace Line

Fastest Pace

8:16 /mi

Average Pace

8:50 /mi

Slowest Pace

9:42 /mi

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Fastest

Middle

Slowest

Average

Segments

Time at Faster Pace

2:23:48

62% of race

Time at Steady Pace

1:27:25

38% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:49 /mi

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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	Females	F18-39	Seg. Overall	Seg. Females	Seg. F18-39
5K	3.11 mi	17173	4243	4243	16070	3870	3870
10K	3.10 mi	17377-204	4323-80	4323-80	17694	4434	4434
15K	3.11 mi	16869+508	4137+186	4137+186	16070	3870	3870
20K	3.11 mi	16911-42	4183-46	4183-46	17346	4349	4349
Half(13.10 mi)	0.67 mi	17017-106	4225-42	4225-42	19272	5026	5026
25K	2.43 mi	17108-91	4281-56	4281-56	18063	4687	4687
30K	3.11 mi	17415-307	4457-176	4457-176	19698	5511	5511
35K	3.11 mi	17617-202	4644-187	4644-187	19725	5979	5979
40K	3.10 mi	16991+626	4573+71	4573+71	15007	4595	4595
Finish(26.22 mi)	1.37 mi	16743+248	4532+41	4532+41	13988	4276	4276

4276

Passing Analysis

Category:

▲Net Change

0 passed by0* passed

Segment	Movement	Rank
Start → 5K	-	#17173
5K → 10K	200200-204	#17173 → #17377
10K → 15K	93601*+508	#17377 → #16869
15K → 20K	200200-42	#16869 → #16911
20K → Half	13226-106	#16911 → #17017
Half → 25K	200200-91	#17017 → #17108
25K → 30K	617310-307	#17108 → #17415
30K → 35K	200200-202	#17415 → #17617
35K → 40K	124750*+626	#17617 → #16991
40K → Finish	52300*+248	#16991 → #16743
TOTALS	18182787*+430	#17173 → #16743

* Includes athletes who did not complete a segment (DNF/DNQ).

Passing Visualized

Category:

Passing Circle

Position Flow

Race Lanes

All Results

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Public Race Data

Enhanced athlete results built from publicly available data.

Race managed by

London Marathon Events

Race timed by

Mika Timing