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LONDON MARATHON MASS 2026

Chloe Byrom

Bib: 73296 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
5K· 3.11 mi
10:16/mi
31:53
↑ 49↓ 125
10K· 6.21 mi
10:26/mi
1:04:16
↑ 50↓ 81
15K· 9.32 mi
10:52/mi
1:38:00
↑ 44↓ 51
20K· 12.43 mi
10:41/mi
2:11:11
↑ 67↓ 40
Half· 13.10 mi
11:08/mi
2:18:39
↓ 27
25K· 15.53 mi
11:52/mi
2:47:32
↑ 50↓ 63
30K· 18.64 mi
12:41/mi
3:26:56
↑ 69↓ 46
35K· 21.75 mi
14:05/mi
4:10:40
↑ 87↓ 88
40K· 24.85 mi
12:32/mi
4:49:36
↑ 58↓ 75
Finish· 26.22 mi
13:15/mi
5:07:40
↑ 14↓ 18
Course Elevation
6–172 ft
≈
×14story building
•▲ 503 ft climb · ▼ 613 ft descent

The Course

Half Splits

1st Half· via Half
2:18:3910:36 /mi⚡ faster
2nd Half
2:49:0112:53 /mi+21.9%
Positive split — 21.9% slower in the second half
Is this your race?

Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointTimeAvg PaceSegment LengthSegment TimeSegment PaceTrendDiff
5K
31:5310:163.11 mi31:53
10:16
-
10K
1:04:1610:213.10 mi32:23
10:26
+0:10
15K
1:38:0010:313.11 mi33:44
10:52
+0:26
20K
2:11:1110:343.11 mi33:11
10:41
-0:11
Half(13.10 mi)
2:18:3910:360.67 mi7:28
11:08
+0:27
25K
2:47:3210:482.43 mi28:53
11:52
+0:44
30K
3:26:5611:073.11 mi39:24
12:41
+0:49
35K
4:10:4011:323.11 mi43:44
14:05
+1:24
40K
4:49:3611:403.10 mi38:56
12:32
-1:33
Finish(26.22 mi)
5:07:4011:451.37 mi18:04
13:15
+0:43
Trend:
Faster pace
Steady pace
Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

10:16 /mi

Average Pace

11:45 /mi

Slowest Pace

14:05 /mi

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Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

2:18:39

45% of race

Time at Steady Pace

28:53

9% of race

Time at Slower Pace

2:20:08

46% of race

Average Pace: 11:44 /mi

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Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

Heatmap

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0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Checkpoint and Segment Rankings

CheckpointSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi415781426414264404841379013790
10K3.10 mi40937+64113913+35113913+351406091379413794
15K3.11 mi40637+30013790+12313790+123404841379013790
20K3.11 mi40135+50213609+18113609+181393311348013480
Half(13.10 mi)0.67 mi40074+6113606+313606+3400781410914109
25K2.43 mi40463-38913959-35313959-353422851549715497
30K3.11 mi40900-43714379-42014379-420427801620516205
35K3.11 mi42053-115315221-84215221-842464921872118721
40K3.10 mi41771+28215242-2115242-21392211536115361
Finish(26.22 mi)1.37 mi42076-30515453-21115453-211478361960419604

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 68%
×10story building
+49ft-125ft

Overall

40484

Females

13790

F18-39

13790

5K→10K

3.1 - 6.2 mi

Top 68%
×4story building
+50ft-81ft

Overall

40609

Females

13794

F18-39

13794

10K→15K

6.2 - 9.3 mi

Top 68%
×1story
+44ft-51ft

Overall

40484

Females

13790

F18-39

13790

15K→20K

9.3 - 12.4 mi

Top 66%
×3story building
+67ft-40ft

Overall

39331

Females

13480

F18-39

13480

20K→Half

12.4 - 13.1 mi

Top 67%
×2story building
+8ft-27ft

Overall

40078

Females

14109

F18-39

14109

Half→25K

13.1 - 15.5 mi

Top 71%
×2story building
+50ft-63ft

Overall

42285

Females

15497

F18-39

15497

25K→30K

15.5 - 18.6 mi

Top 72%
×2story building
+69ft-46ft

Overall

42780

Females

16205

F18-39

16205

30K→35K

18.6 - 21.8 mi

Top 78%
×2story building
+87ft-88ft

Overall

46492

Females

18721

F18-39

18721

35K→40K

21.8 - 24.9 mi

Top 66%
×3story building
+58ft-75ft

Overall

39221

Females

15361

F18-39

15361

40K→Finish

24.9 - 26.2 mi

Top 80%
×1story
+14ft-18ft

Overall

47836

Females

19604

F18-39

19604

Passing Analysis

Category:
▼Net Change
0
0 passed by0 passed
SegmentMovementRank
Start → 5K-#41578
5K → 10K
4711112+641
#41578 → #40937
10K → 15K
425725+300
#40937 → #40637
15K → 20K
270772+502
#40637 → #40135
20K → Half
107168+61
#40135 → #40074
Half → 25K
774385-389
#40074 → #40463
25K → 30K
849412-437
#40463 → #40900
30K → 35K
1385232-1153
#40900 → #42053
35K → 40K
257539+282
#42053 → #41771
40K → Finish
38883-305
#41771 → #42076
TOTALS
49264428-498
#41578 → #42076

Passing Visualized

Category:
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Passing Circle

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Position Flow

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Race Lanes

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Public Race Data

London Marathon Events

London Marathon Events

Mika Timing

Mika Timing