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BOSTON MARATHON 2024

Belle Zelazny

Bib: 15620•F

NY

0:00
0:00
/ mi
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Overall
#0 / 25550
Gender (Female)
#0 / 10924
Division (F18-39)
#0 / 4660
Race Day Weather
55°/45°F
scattered clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
29:17
Rank: #21515
Start → 5K
9:26/mi
29:17 split
10K· 6.21 mi
59:21
Rank: #21691 (-176)
5K → 10K
9:41/mi
30:04 split
15K· 9.32 mi
1:29:33
Rank: #21529 (+162)
10K → 15K
9:43/mi
30:12 split
20K· 12.43 mi
2:00:49
Rank: #21251 (+278)
15K → 20K
10:04/mi
31:16 split
Half· 13.11 mi
2:07:33
Rank: #21250 (+1)
20K → Half
9:52/mi
6:44 split
25K· 15.53 mi
2:32:22
Rank: #20969 (+281)
Half → 25K
10:14/mi
24:49 split
30K· 18.64 mi
3:05:42
Rank: #20668 (+301)
25K → 30K
10:44/mi
33:20 split
20M
3:20:21
Rank: #20495 (+173)
30K → 20M
10:47/mi
14:39 split
21M
3:31:36
Rank: #20321 (+174)
20M → 21M
11:15/mi
11:15 split
35K· 21.75 mi
3:39:20
Rank: #20231 (+90)
21M → 35K
10:20/mi
7:44 split
23M
3:52:59
Rank: #20109 (+122)
35K → 23M
10:54/mi
13:39 split
24M
4:04:06
Rank: #20055 (+54)
23M → 24M
11:07/mi
11:07 split
40K· 24.85 mi
4:13:46
Rank: #20023 (+32)
24M → 40K
11:18/mi
9:40 split
25.2M
4:17:40
Rank: #19939 (+84)
40K → 25.2M
11:19/mi
3:54 split
Finish· 26.22 mi
4:27:30
Rank: #19829 (+110)
25.2M → Finish
9:39/mi
9:50 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:07:33
Pace9:44 /mi
2nd Half
Distance13.11 mi
Time2:19:57
Pace10:41 /mi
📊Positive Split: 9.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:00:3429:179:2629:17
9:26
-
10K
6.21 mi11:30:3859:219:3330:04
9:41
+0:15
15K
9.32 mi12:00:501:29:339:3630:12
9:43
+0:02
20K
12.43 mi12:32:062:00:499:4331:16
10:04
+0:21
Half
13.11 mi12:38:502:07:339:446:44
9:52
-0:12
25K
15.53 mi13:03:392:32:229:4924:49
10:14
+0:22
30K
18.64 mi13:36:593:05:429:5833:20
10:44
+0:30
20M
20.00 mi13:51:383:20:2110:0114:39
10:47
+0:03
21M
21.00 mi14:02:533:31:3610:0511:15
11:15
+0:28
35K
21.75 mi14:10:373:39:2010:057:44
10:20
-0:55
23M
23.00 mi14:24:163:52:5910:0813:39
10:54
+0:34
24M
24.00 mi14:35:234:04:0610:1011:07
11:07
+0:13
40K
24.85 mi14:45:034:13:4610:139:40
11:18
+0:11
25.2M
25.20 mi14:48:574:17:4010:133:54
11:19
+0:01
Finish
26.22 mi14:58:474:27:3010:139:50
9:39
-1:40

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

9:26 /mi

Average Pace

10:13 /mi

Slowest Pace

11:19 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:49:56

64% of race

Time at Steady Pace

1:12:45

27% of race

Time at Slower Pace

24:49

9% of race

Average Pace: 10:12 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

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

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:00:3429:179:2629:17
9:26
#21515
10K
6.21 mi11:30:3859:219:3330:04
9:41
#21691
15K
9.32 mi12:00:501:29:339:3630:12
9:43
#21529
20K
12.43 mi12:32:062:00:499:4331:16
10:04
#21251
Half
13.11 mi12:38:502:07:339:446:44
9:52
#21250
25K
15.53 mi13:03:392:32:229:4924:49
10:14
#20969
30K
18.64 mi13:36:593:05:429:5833:20
10:44
#20668
20M
20.00 mi13:51:383:20:2110:0114:39
10:47
#20495
21M
21.00 mi14:02:533:31:3610:0511:15
11:15
#20321
35K
21.75 mi14:10:373:39:2010:057:44
10:20
#20231
23M
23.00 mi14:24:163:52:5910:0813:39
10:54
#20109
24M
24.00 mi14:35:234:04:0610:1011:07
11:07
#20055
40K
24.85 mi14:45:034:13:4610:139:40
11:18
#20023
25.2M
25.20 mi14:48:574:17:4010:133:54
11:19
#19939
Finish
26.22 mi14:58:474:27:3010:139:50
9:39
#19829
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi215158677867721236(Top 83%)8455(Top 77%)8455(Top 181%)
10K6.21 mi3.10 mi21691-1768750-738750-7321799(Top 85%)8798(Top 81%)8798(Top 189%)
15K9.32 mi3.11 mi21529+1628648+1028648+10221236(Top 83%)8455(Top 77%)8455(Top 181%)
20K12.43 mi3.11 mi21251+2788487+1618487+16120721(Top 81%)8200(Top 75%)8200(Top 176%)
Half13.11 mi0.68 mi21250+18487848721133(Top 83%)8471(Top 78%)8471(Top 182%)
25K15.53 mi2.42 mi20969+2818361+1268361+12619755(Top 77%)7792(Top 71%)7792(Top 167%)
30K18.64 mi3.11 mi20668+3018242+1198242+11919357(Top 76%)7767(Top 71%)7767(Top 167%)
20M20.00 mi1.36 mi20495+1738187+558187+5518753(Top 73%)7596(Top 70%)7596(Top 163%)
21M21.00 mi1.00 mi20321+1748117+708117+7017023(Top 67%)6872(Top 63%)6872(Top 147%)
35K21.75 mi0.75 mi20231+908091+268091+2618142(Top 71%)7407(Top 68%)7407(Top 159%)
23M23.00 mi1.25 mi20109+1228050+418050+4118162(Top 71%)7485(Top 69%)7485(Top 161%)
24M24.00 mi1.00 mi20055+548039+118039+1119548(Top 77%)8225(Top 75%)8225(Top 177%)
40K24.85 mi0.85 mi20023+328040-18040-118880(Top 74%)7953(Top 73%)7953(Top 171%)
25.2M25.20 mi0.35 mi19939+847999+417999+4115558(Top 61%)6330(Top 58%)6330(Top 136%)
Finish26.22 mi1.02 mi19829+1107959+407959+4017170(Top 67%)7102(Top 65%)7102(Top 152%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 83%
×21story building
+97ft-345ft

Overall

21236

Females

8455

F18-39

8455

5K→10K

3.1 - 6.2 mi

Top 85%
×5story building
+79ft-138ft

Overall

21799

Females

8798

F18-39

8798

10K→15K

6.2 - 9.3 mi

Top 83%
×3story building
+67ft-78ft

Overall

21236

Females

8455

F18-39

8455

15K→20K

9.3 - 12.4 mi

Top 81%
×5story building
+106ft-86ft

Overall

20721

Females

8200

F18-39

8200

20K→Half

12.4 - 13.1 mi

Top 83%
×2story building
+19ft-37ft

Overall

21133

Females

8471

F18-39

8471

Half→25K

13.1 - 15.5 mi

Top 77%
×4story building
+66ft-88ft

Overall

19755

Females

7792

F18-39

7792

25K→30K

15.5 - 18.6 mi

Top 76%
×9story building
+181ft-148ft

Overall

19357

Females

7767

F18-39

7767

30K→20M

18.6 - 20.0 mi

Top 73%
×5story building
+64ft-50ft

Overall

18753

Females

7596

F18-39

7596

20M→21M

20.0 - 21.0 mi

Top 67%
×8story building
+106ft-24ft

Overall

17023

Females

6872

F18-39

6872

21M→35K

21.0 - 21.8 mi

Top 71%
×7story building
+17ft-86ft

Overall

18142

Females

7407

F18-39

7407

35K→23M

21.8 - 23.0 mi

Top 71%
×5story building
+23ft-63ft

Overall

18162

Females

7485

F18-39

7485

23M→24M

23.0 - 24.0 mi

Top 77%
×6story building
+12ft-82ft

Overall

19548

Females

8225

F18-39

8225

24M→40K

24.0 - 24.9 mi

Top 74%
×1story
+6ft-20ft

Overall

18880

Females

7953

F18-39

7953

40K→25.2M

24.9 - 25.2 mi

Top 61%
×1story
+13ft-16ft

Overall

15558

Females

6330

F18-39

6330

25.2M→Finish

25.2 - 26.2 mi

Top 67%
×2story building
+22ft-21ft

Overall

17170

Females

7102

F18-39

7102

Passing Analysis

Category:
Athletes Passed
2444
Passed By
758
Net Change
+1686
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21515
5K → 10K165341-176#21515#21691
10K → 15K270108+162#21691#21529
15K → 20K33860+278#21529#21251
20K → Half2928+1#21251#21250
Half → 25K30827+281#21250#20969
25K → 30K34241+301#20969#20668
30K → 20M18714+173#20668#20495
20M → 21M1828+174#20495#20321
21M → 35K999+90#20321#20231
35K → 23M15129+122#20231#20109
23M → 24M9642+54#20109#20055
24M → 40K7341+32#20055#20023
40K → 25.2M873+84#20023#19939
25.2M → Finish1177+110#19939#19829
TOTALS2444758+1686
📊

Passing Visuals

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

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing