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BOSTON MARATHON 2024

Keri Nakajima

Bib: 14678•F

VA

0:00
0:00
/ mi
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Overall
#0 / 25550
Top 45%
Gender (Female)
#0 / 10924
Top 32%
Division (F18-39)
#0 / 4660
Top 49%
Race Day Weather
55°/45°F
scattered clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
7:16/mi
22:36
↑ 97↓ 3451.5%
10K· 6.21 mi
7:24/mi
45:35
↑ 79↓ 1380.4%
15K· 9.32 mi
7:36/mi
1:09:13
↑ 67↓ 78
20K· 12.43 mi
8:00/mi
1:34:04
↑ 106↓ 860.1%
Half· 13.11 mi
8:17/mi
1:39:43
↑ 19↓ 370.5%
25K· 15.53 mi
8:35/mi
2:00:32
↑ 66↓ 880.2%
30K· 18.64 mi
8:30/mi
2:26:55
↑ 181↓ 1480.2%
20M
9:00/mi
2:39:09
↑ 64↓ 500.2%
21M
9:36/mi
2:48:45
↑ 106↓ 241.6%
35K· 21.75 mi
9:01/mi
2:55:30
↑ 17↓ 861.7%
23M
9:35/mi
3:07:30
↑ 23↓ 630.6%
24M
9:49/mi
3:17:19
↓ 821.3%
40K· 24.85 mi
9:56/mi
3:25:49
↓ 200.3%
25.2M
10:47/mi
3:29:32
↑ 13↓ 160.2%
Finish· 26.22 mi
8:50/mi
3:38:32
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:39:43
Pace7:36 /mi
2nd Half
Distance13.11 mi
Time1:58:49
Pace9:04 /mi
📊Positive Split: 19.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:54:3822:367:1622:36
7:16
-
10K
6.21 mi11:17:3745:357:2022:59
7:24
+0:08
15K
9.32 mi11:41:151:09:137:2623:38
7:36
+0:12
20K
12.43 mi12:06:061:34:047:3424:51
8:00
+0:24
Half
13.11 mi12:11:451:39:437:365:39
8:17
+0:17
25K
15.53 mi12:32:342:00:327:4620:49
8:35
+0:18
30K
18.64 mi12:58:572:26:557:5326:23
8:30
-0:05
20M
20.00 mi13:11:112:39:097:5712:14
9:00
+0:30
21M
21.00 mi13:20:472:48:458:029:36
9:36
+0:36
35K
21.75 mi13:27:322:55:308:046:45
9:01
-0:35
23M
23.00 mi13:39:323:07:308:0912:00
9:35
+0:34
24M
24.00 mi13:49:213:17:198:139:49
9:49
+0:14
40K
24.85 mi13:57:513:25:498:178:30
9:56
+0:07
25.2M
25.20 mi14:01:343:29:328:193:43
10:47
+0:51
Finish
26.22 mi14:10:343:38:328:209:00
8:50
-1:57

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

7:16 /mi

Average Pace

8:20 /mi

Slowest Pace

10:47 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:39:43

46% of race

Time at Steady Pace

1:15:11

34% of race

Time at Slower Pace

43:38

20% of race

Average Pace: 8:20 /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 mi10:54:3822:367:1622:36
7:16
#8998
10K
6.21 mi11:17:3745:357:2022:59
7:24
#9174
15K
9.32 mi11:41:151:09:137:2623:38
7:36
#9548
20K
12.43 mi12:06:061:34:047:3424:51
8:00
#10176
Half
13.11 mi12:11:451:39:437:365:39
8:17
#10398
25K
15.53 mi12:32:342:00:327:4620:49
8:35
#11008
30K
18.64 mi12:58:572:26:557:5326:23
8:30
#10818
20M
20.00 mi13:11:112:39:097:5712:14
9:00
#10877
21M
21.00 mi13:20:472:48:458:029:36
9:36
#10836
35K
21.75 mi13:27:322:55:308:046:45
9:01
#10937
23M
23.00 mi13:39:323:07:308:0912:00
9:35
#11151
24M
24.00 mi13:49:213:17:198:139:49
9:49
#11387
40K
24.85 mi13:57:513:25:498:178:30
9:56
#11529
25.2M
25.20 mi14:01:343:29:328:193:43
10:47
#11580
Finish
26.22 mi14:10:343:38:328:209:00
8:50
#11624
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi89981583158310489(Top 41%)2424(Top 22%)2424(Top 52%)
10K6.21 mi3.10 mi9174-1761690-1071690-1079425(Top 37%)1849(Top 17%)1849(Top 40%)
15K9.32 mi3.11 mi9548-3741881-1911881-19110489(Top 41%)2424(Top 22%)2424(Top 52%)
20K12.43 mi3.11 mi10176-6282246-3652246-36511819(Top 46%)3225(Top 30%)3225(Top 69%)
Half13.11 mi0.68 mi10398-2222365-1192365-11914492(Top 57%)4737(Top 43%)4737(Top 102%)
25K15.53 mi2.42 mi11008-6102727-3622727-36213504(Top 53%)4318(Top 40%)4318(Top 93%)
30K18.64 mi3.11 mi10818+1902728-12728-110634(Top 42%)3007(Top 28%)3007(Top 65%)
20M20.00 mi1.36 mi10877-592817-892817-8912152(Top 48%)4104(Top 38%)4104(Top 88%)
21M21.00 mi1.00 mi10836+412862-452862-4511308(Top 44%)3897(Top 36%)3897(Top 84%)
35K21.75 mi0.75 mi10937-1012945-832945-8313419(Top 53%)5012(Top 46%)5012(Top 108%)
23M23.00 mi1.25 mi11151-2143117-1723117-17213862(Top 54%)5336(Top 49%)5336(Top 115%)
24M24.00 mi1.00 mi11387-2363302-1853302-18515699(Top 61%)6289(Top 58%)6289(Top 135%)
40K24.85 mi0.85 mi11529-1423409-1073409-10714798(Top 58%)5917(Top 54%)5917(Top 127%)
25.2M25.20 mi0.35 mi11580-513458-493458-4913772(Top 54%)5433(Top 50%)5433(Top 117%)
Finish26.22 mi1.02 mi11624-443528-703528-7013350(Top 52%)5141(Top 47%)5141(Top 110%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 41%
×21story building
+97ft-345ft

Overall

10489

Females

2424

F18-39

2424

5K→10K

3.1 - 6.2 mi

Top 37%
×5story building
+79ft-138ft

Overall

9425

Females

1849

F18-39

1849

10K→15K

6.2 - 9.3 mi

Top 41%
×3story building
+67ft-78ft

Overall

10489

Females

2424

F18-39

2424

15K→20K

9.3 - 12.4 mi

Top 46%
×5story building
+106ft-86ft

Overall

11819

Females

3225

F18-39

3225

20K→Half

12.4 - 13.1 mi

Top 57%
×2story building
+19ft-37ft

Overall

14492

Females

4737

F18-39

4737

Half→25K

13.1 - 15.5 mi

Top 53%
×4story building
+66ft-88ft

Overall

13504

Females

4318

F18-39

4318

25K→30K

15.5 - 18.6 mi

Top 42%
×9story building
+181ft-148ft

Overall

10634

Females

3007

F18-39

3007

30K→20M

18.6 - 20.0 mi

Top 48%
×5story building
+64ft-50ft

Overall

12152

Females

4104

F18-39

4104

20M→21M

20.0 - 21.0 mi

Top 44%
×8story building
+106ft-24ft

Overall

11308

Females

3897

F18-39

3897

21M→35K

21.0 - 21.8 mi

Top 53%
×7story building
+17ft-86ft

Overall

13419

Females

5012

F18-39

5012

35K→23M

21.8 - 23.0 mi

Top 54%
×5story building
+23ft-63ft

Overall

13862

Females

5336

F18-39

5336

23M→24M

23.0 - 24.0 mi

Top 61%
×6story building
+12ft-82ft

Overall

15699

Females

6289

F18-39

6289

24M→40K

24.0 - 24.9 mi

Top 58%
×1story
+6ft-20ft

Overall

14798

Females

5917

F18-39

5917

40K→25.2M

24.9 - 25.2 mi

Top 54%
×1story
+13ft-16ft

Overall

13772

Females

5433

F18-39

5433

25.2M→Finish

25.2 - 26.2 mi

Top 52%
×2story building
+22ft-21ft

Overall

13350

Females

5141

F18-39

5141

Passing Analysis

Category:
Athletes Passed
1477
Passed By
4101
Net Change
-2626
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8998
5K → 10K174350-176#8998#9174
10K → 15K92466-374#9174#9548
15K → 20K90716-628#9548#10176
20K → Half7229-222#10176#10398
Half → 25K86696-610#10398#11008
25K → 30K380190+190#11008#10818
30K → 20M123182-59#10818#10877
20M → 21M163122+41#10877#10836
21M → 35K56157-101#10836#10937
35K → 23M80294-214#10937#11151
23M → 24M59295-236#11151#11387
24M → 40K56198-142#11387#11529
40K → 25.2M3081-51#11529#11580
25.2M → Finish81125-44#11580#11624
TOTALS14774101-2626
📊

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