Chelsea Siddall

Bib: 15492 F GB

0:00

0:00

/ mi

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Overall

#0 / 59786

Top 31%

Gender (Female)

#0 / 26115

Top 20%

Division (F18-39)

#0 / 14744

Top 21%

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

9:05/mi

28:12

↑ 49 ft↓ 125 ft0.5% grade

54 ft elev

10K· 6.21 mi

9:04/mi

56:20

↑ 50 ft↓ 81 ft0.2% grade

24 ft elev

15K· 9.32 mi

9:15/mi

1:25:02

↑ 44 ft↓ 51 ft

18 ft elev

20K· 12.43 mi

8:58/mi

1:52:51

↑ 67 ft↓ 40 ft0.2% grade

45 ft elev

Half· 13.10 mi

9:07/mi

1:58:58

↓ 27 ft0.6% grade

25 ft elev

25K· 15.53 mi

8:51/mi

2:20:31

↑ 50 ft↓ 63 ft0.1% grade

12 ft elev

30K· 18.64 mi

8:53/mi

2:48:04

↑ 69 ft↓ 46 ft0.1% grade

35 ft elev

35K· 21.75 mi

8:58/mi

3:15:55

↑ 87 ft↓ 88 ft

34 ft elev

40K· 24.85 mi

8:58/mi

3:43:45

↑ 58 ft↓ 75 ft0.1% grade

17 ft elev

Finish· 26.22 mi

8:43/mi

3:55:38

↑ 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

1:58:589:05 /mi+1.9%

2nd Half

1:56:408:54 /mi✓ faster

Negative split — 1.9% faster in the second half

AI Race Performance Report

Chelsea'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	28:12	9:05	3.11 mi	28:12	9:05	-
10K	56:20	9:04	3.10 mi	28:08	9:04	-0:01
15K	1:25:02	9:08	3.11 mi	28:42	9:15	+0:11
20K	1:52:51	9:05	3.11 mi	27:49	8:58	-0:17
Half(13.10 mi)	1:58:58	9:05	0.67 mi	6:07	9:07	+0:09
25K	2:20:31	9:03	2.43 mi	21:33	8:51	-0:16
30K	2:48:04	9:01	3.11 mi	27:33	8:53	+0:02
35K	3:15:55	9:01	3.11 mi	27:51	8:58	+0:05
40K	3:43:45	9:01	3.10 mi	27:50	8:58	0:00
Finish(26.22 mi)	3:55:38	9:00	1.37 mi	11:53	8:43	-0:15

Trend:

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Checkpoints & Pacing

Pace Line

Fastest Pace

8:43 /mi

Average Pace

9:00 /mi

Slowest Pace

9:15 /mi

Loading chart...

Fastest

Middle

Slowest

Average

Segments

Time at Faster Pace

3:26:56

88% of race

Time at Steady Pace

28:42

12% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:59 /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	27945	8060	8060	24376	6673	6673
10K	3.10 mi	26462+1483	7495+565	7495+565	25300	7087	7087
15K	3.11 mi	25635+827	7164+331	7164+331	24376	6673	6673
20K	3.11 mi	24792+843	6854+310	6854+310	23010	6244	6244
Half(13.10 mi)	0.67 mi	24575+217	6782+72	6782+72	21868	5922	5922
25K	2.43 mi	23368+1207	6400+382	6400+382	19037	5035	5035
30K	3.11 mi	21688+1680	5918+482	5918+482	16157	4232	4232
35K	3.11 mi	20060+1628	5518+400	5518+400	14091	3841	3841
40K	3.10 mi	18833+1227	5229+289	5229+289	13215	3875	3875
Finish(26.22 mi)	1.37 mi	18363+470	5114+115	5114+115	12543	3699	3699

3699

Passing Analysis

No position changes recorded for this athlete.

All Results

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Public Race Data

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Race managed by

London Marathon Events

Race timed by

Mika Timing