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BOSTON MARATHON 2024

Naoko Ku

Bib: 17164•F

IL

0:00
0:00
/ mi
Masters
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Overall
#0 / 25550
Gender (Female)
#0 / 10924
Masters (Masters Women)
#0 / 6263
Division (F50-54)
#0 / 1187
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
8:20/mi
25:53
↑ 97↓ 3451.5%
10K· 6.21 mi
8:23/mi
51:57
↑ 79↓ 1380.4%
15K· 9.32 mi
8:29/mi
1:18:17
↑ 67↓ 78
20K· 12.43 mi
9:45/mi
1:48:33
↑ 106↓ 860.1%
Half· 13.11 mi
8:36/mi
1:54:25
↑ 19↓ 370.5%
25K· 15.53 mi
10:15/mi
2:19:15
↑ 66↓ 880.2%
30K· 18.64 mi
11:28/mi
2:54:51
↑ 181↓ 1480.2%
20M
12:52/mi
3:12:20
↑ 64↓ 500.2%
21M
12:52/mi
3:25:12
↑ 106↓ 241.6%
35K· 21.75 mi
12:08/mi
3:34:17
↑ 17↓ 861.7%
23M
9:45/mi
3:46:30
↑ 23↓ 630.6%
24M
10:24/mi
3:56:54
↓ 821.3%
40K· 24.85 mi
9:32/mi
4:05:03
↓ 200.3%
25.2M
12:14/mi
4:09:16
↑ 13↓ 160.2%
Finish· 26.22 mi
9:13/mi
4:18:40
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:54:25
Pace8:44 /mi
2nd Half
Distance13.11 mi
Time2:24:15
Pace11:00 /mi
📊Positive Split: 26.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:3925:538:2025:53
8:20
-
10K
6.21 mi11:42:4351:578:2226:04
8:23
+0:03
15K
9.32 mi12:09:031:18:178:2426:20
8:29
+0:06
20K
12.43 mi12:39:191:48:338:4430:16
9:45
+1:16
Half
13.11 mi12:45:111:54:258:445:52
8:36
-1:09
25K
15.53 mi13:10:012:19:158:5824:50
10:15
+1:39
30K
18.64 mi13:45:372:54:519:2335:36
11:28
+1:13
20M
20.00 mi14:03:063:12:209:3717:29
12:52
+1:24
21M
21.00 mi14:15:583:25:129:4612:52
12:52
0:00
35K
21.75 mi14:25:033:34:179:519:05
12:08
-0:44
23M
23.00 mi14:37:163:46:309:5112:13
9:45
-2:23
24M
24.00 mi14:47:403:56:549:5210:24
10:24
+0:39
40K
24.85 mi14:55:494:05:039:528:09
9:32
-0:52
25.2M
25.20 mi15:00:024:09:169:534:13
12:14
+2:42
Finish
26.22 mi15:09:264:18:409:529:24
9:13
-3:01

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

8:20 /mi

Average Pace

9:52 /mi

Slowest Pace

12:52 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:24:09

33% of race

Time at Steady Pace

1:35:16

37% of race

Time at Slower Pace

1:19:15

31% of race

Average Pace: 9:52 /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 mi11:16:3925:538:2025:53
8:20
#16836
10K
6.21 mi11:42:4351:578:2226:04
8:23
#16706
15K
9.32 mi12:09:031:18:178:2426:20
8:29
#16497
20K
12.43 mi12:39:191:48:338:4430:16
9:45
#17699
Half
13.11 mi12:45:111:54:258:445:52
8:36
#17616
25K
15.53 mi13:10:012:19:158:5824:50
10:15
#18140
30K
18.64 mi13:45:372:54:519:2335:36
11:28
#18952
20M
20.00 mi14:03:063:12:209:3717:29
12:52
#19405
21M
21.00 mi14:15:583:25:129:4612:52
12:52
#19463
35K
21.75 mi14:25:033:34:179:519:05
12:08
#19557
23M
23.00 mi14:37:163:46:309:5112:13
9:45
#19289
24M
24.00 mi14:47:403:56:549:5210:24
10:24
#19195
40K
24.85 mi14:55:494:05:039:528:09
9:32
#18962
25.2M
25.20 mi15:00:024:09:169:534:13
12:14
#18940
Finish
26.22 mi15:09:264:18:409:529:24
9:13
#18815
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi168366065606516285(Top 64%)5737(Top 53%)5737(Top 483%)
10K6.21 mi3.10 mi16706+1305986+795986+7916652(Top 65%)5924(Top 54%)5924(Top 499%)
15K9.32 mi3.11 mi16497+2095850+1365850+13616285(Top 64%)5737(Top 53%)5737(Top 483%)
20K12.43 mi3.11 mi17699-12026575-7256575-72519898(Top 78%)7752(Top 71%)7752(Top 653%)
Half13.11 mi0.68 mi17616+836536+396536+3916337(Top 64%)5845(Top 54%)5845(Top 492%)
25K15.53 mi2.42 mi18140-5246845-3096845-30919767(Top 77%)7797(Top 71%)7797(Top 657%)
30K18.64 mi3.11 mi18952-8127343-4987343-49820943(Top 82%)8601(Top 79%)8601(Top 725%)
20M20.00 mi1.36 mi19405-4537625-2827625-28222694(Top 89%)9605(Top 88%)9605(Top 809%)
21M21.00 mi1.00 mi19463-587671-467671-4620502(Top 80%)8578(Top 79%)8578(Top 723%)
35K21.75 mi0.75 mi19557-947739-687739-6822055(Top 86%)9379(Top 86%)9379(Top 790%)
23M23.00 mi1.25 mi19289+2687612+1277612+12714605(Top 57%)5724(Top 52%)5724(Top 482%)
24M24.00 mi1.00 mi19195+947585+277585+2717582(Top 69%)7254(Top 66%)7254(Top 611%)
40K24.85 mi0.85 mi18962+2337483+1027483+10213279(Top 52%)5194(Top 48%)5194(Top 438%)
25.2M25.20 mi0.35 mi18940+227473+107473+1017902(Top 70%)7502(Top 69%)7502(Top 632%)
Finish26.22 mi1.02 mi18815+1257441+327441+3215280(Top 60%)6141(Top 56%)6141(Top 517%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 64%
×21story building
+97ft-345ft

Overall

16285

Females

5737

F50-54

5737

5K→10K

3.1 - 6.2 mi

Top 65%
×5story building
+79ft-138ft

Overall

16652

Females

5924

F50-54

5924

10K→15K

6.2 - 9.3 mi

Top 64%
×3story building
+67ft-78ft

Overall

16285

Females

5737

F50-54

5737

15K→20K

9.3 - 12.4 mi

Top 78%
×5story building
+106ft-86ft

Overall

19898

Females

7752

F50-54

7752

20K→Half

12.4 - 13.1 mi

Top 64%
×2story building
+19ft-37ft

Overall

16337

Females

5845

F50-54

5845

Half→25K

13.1 - 15.5 mi

Top 77%
×4story building
+66ft-88ft

Overall

19767

Females

7797

F50-54

7797

25K→30K

15.5 - 18.6 mi

Top 82%
×9story building
+181ft-148ft

Overall

20943

Females

8601

F50-54

8601

30K→20M

18.6 - 20.0 mi

Top 89%
×5story building
+64ft-50ft

Overall

22694

Females

9605

F50-54

9605

20M→21M

20.0 - 21.0 mi

Top 80%
×8story building
+106ft-24ft

Overall

20502

Females

8578

F50-54

8578

21M→35K

21.0 - 21.8 mi

Top 86%
×7story building
+17ft-86ft

Overall

22055

Females

9379

F50-54

9379

35K→23M

21.8 - 23.0 mi

Top 57%
×5story building
+23ft-63ft

Overall

14605

Females

5724

F50-54

5724

23M→24M

23.0 - 24.0 mi

Top 69%
×6story building
+12ft-82ft

Overall

17582

Females

7254

F50-54

7254

24M→40K

24.0 - 24.9 mi

Top 52%
×1story
+6ft-20ft

Overall

13279

Females

5194

F50-54

5194

40K→25.2M

24.9 - 25.2 mi

Top 70%
×1story
+13ft-16ft

Overall

17902

Females

7502

F50-54

7502

25.2M→Finish

25.2 - 26.2 mi

Top 60%
×2story building
+22ft-21ft

Overall

15280

Females

6141

F50-54

6141

Passing Analysis

Category:
Athletes Passed
1861
Passed By
3840
Net Change
-1979
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16836
5K → 10K348218+130#16836#16706
10K → 15K331122+209#16706#16497
15K → 20K581260-1202#16497#17699
20K → Half907+83#17699#17616
Half → 25K73597-524#17616#18140
25K → 30K59871-812#18140#18952
30K → 20M23476-453#18952#19405
20M → 21M63121-58#19405#19463
21M → 35K31125-94#19463#19557
35K → 23M2691+268#19557#19289
23M → 24M11622+94#19289#19195
24M → 40K2341+233#19195#18962
40K → 25.2M3614+22#18962#18940
25.2M → Finish1305+125#18940#18815
TOTALS18613840-1979
📊

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