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BOSTON MARATHON 2025

Sumie Yamakawa

Bib: 21753•F

ON

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 38%
Masters (Masters Women)
#0 / 6759
Top 23%
Division (F45-49)
#0 / 1813
Top 28%
Race Day Weather
50°/40°F
broken 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
8:35/mi
26:41
↑ 97↓ 3451.5%
10K· 6.21 mi
8:24/mi
52:46
↑ 79↓ 1380.4%
15K· 9.32 mi
8:16/mi
1:18:27
↑ 67↓ 78
20K· 12.43 mi
8:28/mi
1:44:45
↑ 106↓ 860.1%
Half· 13.11 mi
8:21/mi
1:50:27
↑ 19↓ 370.5%
25K· 15.53 mi
8:06/mi
2:10:06
↑ 66↓ 880.2%
30K· 18.64 mi
8:02/mi
2:35:05
↑ 181↓ 1480.2%
20M
8:06/mi
2:46:05
↑ 64↓ 500.2%
21M
8:16/mi
2:54:21
↑ 106↓ 241.6%
35K· 21.75 mi
7:41/mi
3:00:06
↑ 17↓ 861.7%
23M
7:51/mi
3:09:56
↑ 23↓ 630.6%
24M
7:37/mi
3:17:33
↓ 821.3%
40K· 24.85 mi
7:47/mi
3:24:12
↓ 200.3%
25.2M
8:27/mi
3:27:07
↑ 13↓ 160.2%
Finish· 26.22 mi
7:44/mi
3:35:00
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:50:27
Pace8:26 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:44:33
Pace7:59 /mi
📊Negative Split: 5.3% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:25:3226:418:3526:41
8:35
-
10K
6.21 mi11:51:3752:468:3026:05
8:24
-0:11
15K
9.32 mi12:17:181:18:278:2525:41
8:16
-0:08
20K
12.43 mi12:43:361:44:458:2626:18
8:28
+0:12
Half
13.11 mi12:49:181:50:278:265:42
8:21
-0:07
25K
15.53 mi13:08:572:10:068:2319:39
8:06
-0:15
30K
18.64 mi13:33:562:35:058:1924:59
8:02
-0:04
20M
20.00 mi13:44:562:46:058:1811:00
8:06
+0:04
21M
21.00 mi13:53:122:54:218:188:16
8:16
+0:10
35K
21.75 mi13:58:573:00:068:175:45
7:41
-0:35
23M
23.00 mi14:08:473:09:568:159:50
7:51
+0:10
24M
24.00 mi14:16:243:17:338:147:37
7:37
-0:14
40K
24.85 mi14:23:033:24:128:136:39
7:47
+0:10
25.2M
25.20 mi14:25:583:27:078:132:55
8:27
+0:40
Finish
26.22 mi14:33:513:35:008:127:53
7:44
-0:43

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

7:37 /mi

Average Pace

8:12 /mi

Slowest Pace

8:35 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:13:01

62% of race

Time at Steady Pace

1:21:59

38% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:12 /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 mi11:25:3226:418:3526:41
8:35
#20395
10K
6.21 mi11:51:3752:468:3026:05
8:24
#19786
15K
9.32 mi12:17:181:18:278:2525:41
8:16
#19133
20K
12.43 mi12:43:361:44:458:2626:18
8:28
#18825
Half
13.11 mi12:49:181:50:278:265:42
8:21
#18811
25K
15.53 mi13:08:572:10:068:2319:39
8:06
#18097
30K
18.64 mi13:33:562:35:058:1924:59
8:02
#16954
20M
20.00 mi13:44:562:46:058:1811:00
8:06
#16534
21M
21.00 mi13:53:122:54:218:188:16
8:16
#16094
35K
21.75 mi13:58:573:00:068:175:45
7:41
#15838
23M
23.00 mi14:08:473:09:568:159:50
7:51
#15443
24M
24.00 mi14:16:243:17:338:147:37
7:37
#15111
40K
24.85 mi14:23:033:24:128:136:39
7:47
#14848
25.2M
25.20 mi14:25:583:27:078:132:55
8:27
#14736
Finish
26.22 mi14:33:513:35:008:127:53
7:44
#14570
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi203957737773717828(Top 63%)6217(Top 51%)6217(Top 343%)
10K6.21 mi3.10 mi19786+6097344+3937344+39319158(Top 67%)6973(Top 57%)6973(Top 385%)
15K9.32 mi3.11 mi19133+6536975+3696975+36917828(Top 63%)6217(Top 51%)6217(Top 343%)
20K12.43 mi3.11 mi18825+3086805+1706805+17017987(Top 63%)6327(Top 52%)6327(Top 349%)
Half13.11 mi0.68 mi18811+146800+56800+518293(Top 64%)6470(Top 53%)6470(Top 357%)
25K15.53 mi2.42 mi18097+7146413+3876413+38714693(Top 52%)4587(Top 38%)4587(Top 253%)
30K18.64 mi3.11 mi16954+11435787+6265787+62611698(Top 41%)3146(Top 26%)3146(Top 174%)
20M20.00 mi1.36 mi16534+4205575+2125575+21211112(Top 39%)3009(Top 25%)3009(Top 166%)
21M21.00 mi1.00 mi16094+4405351+2245351+2249064(Top 32%)2207(Top 18%)2207(Top 122%)
35K21.75 mi0.75 mi15838+2565230+1215230+12110071(Top 35%)2657(Top 22%)2657(Top 147%)
23M23.00 mi1.25 mi15443+3955041+1895041+1899008(Top 32%)2274(Top 19%)2274(Top 125%)
24M24.00 mi1.00 mi15111+3324869+1724869+1728590(Top 30%)2152(Top 18%)2152(Top 119%)
40K24.85 mi0.85 mi14848+2634743+1264743+1268663(Top 30%)2315(Top 19%)2315(Top 128%)
25.2M25.20 mi0.35 mi14736+1124691+524691+528685(Top 31%)2398(Top 20%)2398(Top 132%)
Finish26.22 mi1.02 mi14570+1664637+544637+5411011(Top 39%)3479(Top 28%)3479(Top 192%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 63%
×21story building
+97ft-345ft

Overall

17828

Females

6217

F45-49

6217

5K→10K

3.1 - 6.2 mi

Top 67%
×5story building
+79ft-138ft

Overall

19158

Females

6973

F45-49

6973

10K→15K

6.2 - 9.3 mi

Top 63%
×3story building
+67ft-78ft

Overall

17828

Females

6217

F45-49

6217

15K→20K

9.3 - 12.4 mi

Top 63%
×5story building
+106ft-86ft

Overall

17987

Females

6327

F45-49

6327

20K→Half

12.4 - 13.1 mi

Top 64%
×2story building
+19ft-37ft

Overall

18293

Females

6470

F45-49

6470

Half→25K

13.1 - 15.5 mi

Top 52%
×4story building
+66ft-88ft

Overall

14693

Females

4587

F45-49

4587

25K→30K

15.5 - 18.6 mi

Top 41%
×9story building
+181ft-148ft

Overall

11698

Females

3146

F45-49

3146

30K→20M

18.6 - 20.0 mi

Top 39%
×5story building
+64ft-50ft

Overall

11112

Females

3009

F45-49

3009

20M→21M

20.0 - 21.0 mi

Top 32%
×8story building
+106ft-24ft

Overall

9064

Females

2207

F45-49

2207

21M→35K

21.0 - 21.8 mi

Top 35%
×7story building
+17ft-86ft

Overall

10071

Females

2657

F45-49

2657

35K→23M

21.8 - 23.0 mi

Top 32%
×5story building
+23ft-63ft

Overall

9008

Females

2274

F45-49

2274

23M→24M

23.0 - 24.0 mi

Top 30%
×6story building
+12ft-82ft

Overall

8590

Females

2152

F45-49

2152

24M→40K

24.0 - 24.9 mi

Top 30%
×1story
+6ft-20ft

Overall

8663

Females

2315

F45-49

2315

40K→25.2M

24.9 - 25.2 mi

Top 31%
×1story
+13ft-16ft

Overall

8685

Females

2398

F45-49

2398

25.2M→Finish

25.2 - 26.2 mi

Top 39%
×2story building
+22ft-21ft

Overall

11011

Females

3479

F45-49

3479

Passing Analysis

Category:
Athletes Passed
6045
Passed By
220
Net Change
+5825
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20395
5K → 10K710101+609#20395#19786
10K → 15K67017+653#19786#19133
15K → 20K36658+308#19133#18825
20K → Half3925+14#18825#18811
Half → 25K7151+714#18811#18097
25K → 30K11430+1143#18097#16954
30K → 20M4211+420#16954#16534
20M → 21M4400+440#16534#16094
21M → 35K2571+256#16094#15838
35K → 23M3961+395#15838#15443
23M → 24M3320+332#15443#15111
24M → 40K2652+263#15111#14848
40K → 25.2M1120+112#14848#14736
25.2M → Finish17913+166#14736#14570
TOTALS6045220+5825
📊

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