Natalie Byfield

Bib: 36475 F JM

Masters

0:00

0:00

/ mi

Masters

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Overall

#0 / 59786

Gender (Female)

#0 / 26115

Masters (Masters Women)

#0 / 11371

Division (F50-54)

#0 / 2342

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

11:17/mi

35:02

↑ 49 ft↓ 125 ft0.5% grade

54 ft elev

10K· 6.21 mi

11:19/mi

1:10:09

↑ 50 ft↓ 81 ft0.2% grade

24 ft elev

15K· 9.32 mi

11:34/mi

1:46:05

↑ 44 ft↓ 51 ft

18 ft elev

20K· 12.43 mi

11:17/mi

2:21:08

↑ 67 ft↓ 40 ft0.2% grade

45 ft elev

Half· 13.10 mi

12:23/mi

2:29:26

↓ 27 ft0.6% grade

25 ft elev

25K· 15.53 mi

12:04/mi

2:58:49

↑ 50 ft↓ 63 ft0.1% grade

12 ft elev

30K· 18.64 mi

11:50/mi

3:35:33

↑ 69 ft↓ 46 ft0.1% grade

35 ft elev

35K· 21.75 mi

12:41/mi

4:14:56

↑ 87 ft↓ 88 ft

34 ft elev

40K· 24.85 mi

11:35/mi

4:50:54

↑ 58 ft↓ 75 ft0.1% grade

17 ft elev

Finish· 26.22 mi

12:08/mi

5:07:26

↑ 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

2:29:2611:25 /mi⚡ faster

2nd Half

2:38:0012:03 /mi+5.7%

Positive split — 5.7% slower in the second half

AI Race Performance Report

Natalie'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	35:02	11:17	3.11 mi	35:02	11:17	-
10K	1:10:09	11:18	3.10 mi	35:07	11:19	+0:02
15K	1:46:05	11:23	3.11 mi	35:56	11:34	+0:15
20K	2:21:08	11:22	3.11 mi	35:03	11:17	-0:17
Half(13.10 mi)	2:29:26	11:25	0.67 mi	8:18	12:23	+1:06
25K	2:58:49	11:31	2.43 mi	29:23	12:04	-0:19
30K	3:35:33	11:34	3.11 mi	36:44	11:50	-0:14
35K	4:14:56	11:44	3.11 mi	39:23	12:41	+0:51
40K	4:50:54	11:43	3.10 mi	35:58	11:35	-1:06
Finish(26.22 mi)	5:07:26	11:45	1.37 mi	16:32	12:08	+0:33

Trend:

Faster pace

Steady pace

Slower pace

More below

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Checkpoints & Pacing

Pace Line

Fastest Pace

11:17 /mi

Average Pace

11:44 /mi

Slowest Pace

12:41 /mi

Loading chart...

Fastest

Middle

Slowest

Average

Segments

Time at Faster Pace

4:28:03

87% of race

Time at Steady Pace

39:23

13% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 11:44 /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	F50-54	Seg. Overall	Seg. Females	Seg. F50-54
5K	3.11 mi	50347	19475	19475	45816	16802	16802
10K	3.10 mi	49016+1331	18656+819	18656+819	47821	17926	17926
15K	3.11 mi	47763+1253	17912+744	17912+744	45816	16802	16802
20K	3.11 mi	46570+1193	17295+617	17295+617	43762	15916	15916
Half(13.10 mi)	0.67 mi	46622-52	17349-54	17349-54	47509	18372	18372
25K	2.43 mi	45904+718	17021+328	17021+328	43317	16081	16081
30K	3.11 mi	44318+1586	16242+779	16242+779	37968	13714	13714
35K	3.11 mi	43439+879	15965+277	15965+277	38975	14849	14849
40K	3.10 mi	42135+1304	15423+542	15423+542	32335	12056	12056
Finish(26.22 mi)	1.37 mi	42020+115	15417+6	15417+6	40669	15956	15956

15956

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