Rebecca Chaffelson

Bib: 55617 F GB

Masters

0:00

0:00

/ mi

Masters

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Overall

#0 / 59786

Top 46%

Gender (Female)

#0 / 26115

Top 33%

Masters (Masters Women)

#0 / 11371

Top 31%

Division (F40-44)

#0 / 3355

Top 37%

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

9:25/mi

29:14

↑ 49 ft↓ 125 ft0.5% grade

54 ft elev

10K· 6.21 mi

9:29/mi

58:40

↑ 50 ft↓ 81 ft0.2% grade

24 ft elev

15K· 9.32 mi

9:45/mi

1:28:56

↑ 44 ft↓ 51 ft

18 ft elev

20K· 12.43 mi

9:39/mi

1:58:53

↑ 67 ft↓ 40 ft0.2% grade

45 ft elev

Half· 13.10 mi

10:03/mi

2:05:37

↓ 27 ft0.6% grade

25 ft elev

25K· 15.53 mi

9:45/mi

2:29:20

↑ 50 ft↓ 63 ft0.1% grade

12 ft elev

30K· 18.64 mi

10:13/mi

3:01:03

↑ 69 ft↓ 46 ft0.1% grade

35 ft elev

35K· 21.75 mi

11:02/mi

3:35:19

↑ 87 ft↓ 88 ft

34 ft elev

40K· 24.85 mi

10:28/mi

4:07:49

↑ 58 ft↓ 75 ft0.1% grade

17 ft elev

Finish· 26.22 mi

10:05/mi

4:21:34

↑ 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

2:05:379:36 /mi⚡ faster

2nd Half

2:15:5710:22 /mi+8.2%

Positive split — 8.2% slower in the second half

AI Race Performance Report

Rebecca's race, broken down like a coach

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Checkpoint Splits

Checkpoint	Time	Avg Pace	Segment Length	Segment Time	Segment Pace	Diff
5K	29:14	9:25	3.11 mi	29:14	9:25	-
10K	58:40	9:27	3.10 mi	29:26	9:29	+0:04
15K	1:28:56	9:33	3.11 mi	30:16	9:45	+0:16
20K	1:58:53	9:34	3.11 mi	29:57	9:39	-0:06
Half(13.10 mi)	2:05:37	9:36	0.67 mi	6:44	10:03	+0:24
25K	2:29:20	9:37	2.43 mi	23:43	9:45	-0:18
30K	3:01:03	9:43	3.11 mi	31:43	10:13	+0:28
35K	3:35:19	9:55	3.11 mi	34:16	11:02	+0:49
40K	4:07:49	9:59	3.10 mi	32:30	10:28	-0:34
Finish(26.22 mi)	4:21:34	10:00	1.37 mi	13:45	10:05	-0:23

Trend:

Faster pace

Steady pace

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Checkpoints & Pacing

Pace Line

Fastest Pace

9:25 /mi

Average Pace

9:59 /mi

Slowest Pace

11:02 /mi

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Fastest

Middle

Slowest

Average

Segments

Time at Faster Pace

3:14:48

74% of race

Time at Steady Pace

1:06:46

26% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:59 /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	F40-44	Seg. Overall	Seg. Females	Seg. F40-44
5K	3.11 mi	32294	9726	9726	30411	8995	8995
10K	3.10 mi	31672+622	9492+234	9492+234	31196	9330	9330
15K	3.11 mi	31160+512	9289+203	9289+203	30411	8995	8995
20K	3.11 mi	30789+371	9178+111	9178+111	30298	9071	9071
Half(13.10 mi)	0.67 mi	30724+65	9166+12	9166+12	30845	9438	9438
25K	2.43 mi	29884+840	8905+261	8905+261	27367	8156	8156
30K	3.11 mi	29007+877	8710+195	8710+195	27037	8419	8419
35K	3.11 mi	28657+350	8811-101	8811-101	28570	9784	9784
40K	3.10 mi	27775+882	8685+126	8685+126	24063	8296	8296
Finish(26.22 mi)	1.37 mi	27397+378	8609+76	8609+76	23789	8172	8172

8172

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