Sian Fern

Bib: 66273 F GB

0:00

0:00

/ mi

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Overall

#0 / 59786

Gender (Female)

#0 / 26115

Division (F18-39)

#0 / 14744

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

9:26/mi

29:17

↑ 49 ft↓ 125 ft0.5% grade

54 ft elev

10K· 6.21 mi

10:21/mi

1:01:24

↑ 50 ft↓ 81 ft0.2% grade

24 ft elev

15K· 9.32 mi

11:17/mi

1:36:25

↑ 44 ft↓ 51 ft

18 ft elev

20K· 12.43 mi

13:50/mi

2:19:21

↑ 67 ft↓ 40 ft0.2% grade

45 ft elev

Half· 13.10 mi

12:00/mi

2:27:24

↓ 27 ft0.6% grade

25 ft elev

25K· 15.53 mi

11:58/mi

2:56:31

↑ 50 ft↓ 63 ft0.1% grade

12 ft elev

30K· 18.64 mi

13:46/mi

3:39:16

↑ 69 ft↓ 46 ft0.1% grade

35 ft elev

35K· 21.75 mi

13:46/mi

4:22:01

↑ 87 ft↓ 88 ft

34 ft elev

40K· 24.85 mi

12:50/mi

5:01:53

↑ 58 ft↓ 75 ft0.1% grade

17 ft elev

Finish· 26.22 mi

12:05/mi

5:18:21

↑ 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

2:27:2411:16 /mi⚡ faster

2nd Half

2:50:5713:02 /mi+16.0%

Positive split — 16.0% slower in the second half

AI Race Performance Report

Sian'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	29:17	9:26	3.11 mi	29:17	9:26	-
10K	1:01:24	9:53	3.10 mi	32:07	10:21	+0:55
15K	1:36:25	10:21	3.11 mi	35:01	11:17	+0:56
20K	2:19:21	11:13	3.11 mi	42:56	13:50	+2:33
Half(13.10 mi)	2:27:24	11:16	0.67 mi	8:03	12:00	-1:50
25K	2:56:31	11:22	2.43 mi	29:07	11:58	-0:02
30K	3:39:16	11:46	3.11 mi	42:45	13:46	+1:48
35K	4:22:01	12:03	3.11 mi	42:45	13:46	0:00
40K	5:01:53	12:09	3.10 mi	39:52	12:50	-0:56
Finish(26.22 mi)	5:18:21	12:10	1.37 mi	16:28	12:05	-0:45

Trend:

Faster pace

Steady pace

Slower pace

Est.Checkpoint not recorded (estimated)

~Segment time uses estimated prior

More below

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Checkpoints & Pacing

Pace Line

Fastest Pace

9:26 /mi

Average Pace

12:09 /mi

Slowest Pace

13:50 /mi

Loading chart...

Fastest

Middle

Slowest

Average

Segments

Time at Faster Pace

1:36:25

30% of race

Time at Steady Pace

53:38

17% of race

Time at Slower Pace

2:48:18

53% of race

Average Pace: 12:08 /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	Females	F18-39	Seg. Overall	Seg. Females	Seg. F18-39
5K	3.11 mi	32498	9823	9823	43752	15596	15596
10K	3.10 mi	36220-3722	11519-1696	11519-1696	39755	13325	13325
15K	3.11 mi	39041-2821	12957-1438	12957-1438	43752	15596	15596
20K	3.11 mi	45534-6493	16635-3678	16635-3678	54321	22426	22426
Half(13.10 mi)	0.67 mi	45546-12	16682-47	16682-47	45774	17356	17356
25K	2.43 mi	44899+647	16428+254	16428+254	42808	15799	15799
30K	3.11 mi	45627-728	16992-564	16992-564	48043	19090	19090
35K	3.11 mi	45517+110	17113-121	17113-121	44956	17893	17893
40K	3.10 mi	44995+522	16972+141	16972+141	41290	16328	16328
Finish(26.22 mi)	1.37 mi	44730+265	16877+95	16877+95	40330	15803	15803

15803

Passing Analysis

No position changes recorded for this athlete.

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