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BOSTON MARATHON 2025

Chelsie Mizokawa

Bib: 12787•F

CA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 33%
Gender (Female)
#0 / 12228
Top 16%
Division (F18-39)
#0 / 5469
Top 28%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:56
Rank: #11149
Start → 5K
22:56 | 7:23/mi
10K· 6.21 mi
45:53
Rank: #11102 (+47)
5K → 10K
22:57 | 7:23/mi
15K· 9.32 mi
1:08:32
Rank: #10654 (+448)
10K → 15K
22:39 | 7:17/mi
20K· 12.43 mi
1:31:32
Rank: #10457 (+197)
15K → 20K
23:00 | 7:24/mi
Half· 13.11 mi
1:36:30
Rank: #10402 (+55)
20K → Half
4:58 | 7:17/mi
25K· 15.53 mi
1:54:44
Rank: #10319 (+83)
Half → 25K
18:14 | 7:31/mi
30K· 18.64 mi
2:18:44
Rank: #10078 (+241)
25K → 30K
24:00 | 7:43/mi
20M
2:29:17
Rank: #9907 (+171)
30K → 20M
10:33 | 7:46/mi
21M
2:37:40
Rank: #9859 (+48)
20M → 21M
8:23 | 8:23/mi
35K· 21.75 mi
2:43:11
Rank: #9762 (+97)
21M → 35K
5:31 | 7:22/mi
23M
2:52:54
Rank: #9653 (+109)
35K → 23M
9:43 | 7:46/mi
24M
3:00:28
Rank: #9545 (+108)
23M → 24M
7:34 | 7:34/mi
40K· 24.85 mi
3:07:08
Rank: #9493 (+52)
24M → 40K
6:40 | 7:48/mi
25.2M
3:09:58
Rank: #9427 (+66)
40K → 25.2M
2:50 | 8:13/mi
Finish· 26.22 mi
3:17:25
Rank: #9338 (+89)
25.2M → Finish
7:27 | 7:19/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:36:30
Pace7:22 /mi
2nd Half
Distance13.11 mi
Time1:40:55
Pace7:42 /mi
📊Positive Split: 4.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:50:2122:567:2322:56
7:23
-
10K
6.21 mi11:13:1845:537:2322:57
7:23
0:00
15K
9.32 mi11:35:571:08:327:2122:39
7:17
-0:06
20K
12.43 mi11:58:571:31:327:2223:00
7:24
+0:07
Half
13.11 mi12:03:551:36:307:224:58
7:17
-0:07
25K
15.53 mi12:22:091:54:447:2318:14
7:31
+0:14
30K
18.64 mi12:46:092:18:447:2724:00
7:43
+0:12
20M
20.00 mi12:56:422:29:177:2810:33
7:46
+0:03
21M
21.00 mi13:05:052:37:407:308:23
8:23
+0:37
35K
21.75 mi13:10:362:43:117:305:31
7:22
-1:01
23M
23.00 mi13:20:192:52:547:319:43
7:46
+0:24
24M
24.00 mi13:27:533:00:287:317:34
7:34
-0:12
40K
24.85 mi13:34:333:07:087:326:40
7:48
+0:14
25.2M
25.20 mi13:37:233:09:587:322:50
8:13
+0:25
Finish
26.22 mi13:44:503:17:257:327:27
7:19
-0:54

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

7:17 /mi

Average Pace

7:32 /mi

Slowest Pace

8:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:06:12

94% of race

Time at Steady Pace

11:13

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:32 /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 mi10:50:2122:567:2322:56
7:23
#11149
10K
6.21 mi11:13:1845:537:2322:57
7:23
#11102
15K
9.32 mi11:35:571:08:327:2122:39
7:17
#10654
20K
12.43 mi11:58:571:31:327:2223:00
7:24
#10457
Half
13.11 mi12:03:551:36:307:224:58
7:17
#10402
25K
15.53 mi12:22:091:54:447:2318:14
7:31
#10319
30K
18.64 mi12:46:092:18:447:2724:00
7:43
#10078
20M
20.00 mi12:56:422:29:177:2810:33
7:46
#9907
21M
21.00 mi13:05:052:37:407:308:23
8:23
#9859
35K
21.75 mi13:10:362:43:117:305:31
7:22
#9762
23M
23.00 mi13:20:192:52:547:319:43
7:46
#9653
24M
24.00 mi13:27:533:00:287:317:34
7:34
#9545
40K
24.85 mi13:34:333:07:087:326:40
7:48
#9493
25.2M
25.20 mi13:37:233:09:587:322:50
8:13
#9427
Finish
26.22 mi13:44:503:17:257:327:27
7:19
#9338
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi11149235123519934(Top 35%)1857(Top 15%)1857(Top 34%)
10K6.21 mi3.10 mi11102+472347+42347+411086(Top 39%)2346(Top 19%)2346(Top 43%)
15K9.32 mi3.11 mi10654+4482158+1892158+1899934(Top 35%)1857(Top 15%)1857(Top 34%)
20K12.43 mi3.11 mi10457+1972077+812077+819945(Top 35%)1934(Top 16%)1934(Top 35%)
Half13.11 mi0.68 mi10402+552063+142063+149894(Top 35%)1910(Top 16%)1910(Top 35%)
25K15.53 mi2.42 mi10319+832053+102053+1010149(Top 36%)2154(Top 18%)2154(Top 39%)
30K18.64 mi3.11 mi10078+2411995+581995+589372(Top 33%)1991(Top 16%)1991(Top 36%)
20M20.00 mi1.36 mi9907+1711943+521943+528811(Top 31%)1892(Top 15%)1892(Top 35%)
21M21.00 mi1.00 mi9859+481960-171960-179764(Top 34%)2493(Top 20%)2493(Top 46%)
35K21.75 mi0.75 mi9762+971938+221938+227781(Top 27%)1604(Top 13%)1604(Top 29%)
23M23.00 mi1.25 mi9653+1091925+131925+138334(Top 29%)1963(Top 16%)1963(Top 36%)
24M24.00 mi1.00 mi9545+1081920+51920+58193(Top 29%)1947(Top 16%)1947(Top 36%)
40K24.85 mi0.85 mi9493+521930-101930-108764(Top 31%)2334(Top 19%)2334(Top 43%)
25.2M25.20 mi0.35 mi9427+661920+101920+107238(Top 25%)1754(Top 14%)1754(Top 32%)
Finish26.22 mi1.02 mi9338+891915+51915+57880(Top 28%)2021(Top 17%)2021(Top 37%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 35%
×21stories
+97ft-345ft

Overall

9934

Females

1857

F18-39

1857

5K→10K

3.1 - 6.2 mi

Top 39%
×5stories
+79ft-138ft

Overall

11086

Females

2346

F18-39

2346

10K→15K

6.2 - 9.3 mi

Top 35%
×3stories
+67ft-78ft

Overall

9934

Females

1857

F18-39

1857

15K→20K

9.3 - 12.4 mi

Top 35%
×5stories
+106ft-86ft

Overall

9945

Females

1934

F18-39

1934

20K→Half

12.4 - 13.1 mi

Top 35%
×2stories
+19ft-37ft

Overall

9894

Females

1910

F18-39

1910

Half→25K

13.1 - 15.5 mi

Top 36%
×4stories
+66ft-88ft

Overall

10149

Females

2154

F18-39

2154

25K→30K

15.5 - 18.6 mi

Top 33%
×9stories
+181ft-148ft

Overall

9372

Females

1991

F18-39

1991

30K→20M

18.6 - 20.0 mi

Top 31%
×5stories
+64ft-50ft

Overall

8811

Females

1892

F18-39

1892

20M→21M

20.0 - 21.0 mi

Top 34%
×8stories
+106ft-24ft

Overall

9764

Females

2493

F18-39

2493

21M→35K

21.0 - 21.8 mi

Top 27%
×7stories
+17ft-86ft

Overall

7781

Females

1604

F18-39

1604

35K→23M

21.8 - 23.0 mi

Top 29%
×5stories
+23ft-63ft

Overall

8334

Females

1963

F18-39

1963

23M→24M

23.0 - 24.0 mi

Top 29%
×6stories
+12ft-82ft

Overall

8193

Females

1947

F18-39

1947

24M→40K

24.0 - 24.9 mi

Top 31%
×1story
+6ft-20ft

Overall

8764

Females

2334

F18-39

2334

40K→25.2M

24.9 - 25.2 mi

Top 25%
×1story
+13ft-16ft

Overall

7238

Females

1754

F18-39

1754

25.2M→Finish

25.2 - 26.2 mi

Top 28%
×2stories
+22ft-21ft

Overall

7880

Females

2021

F18-39

2021

Passing Analysis

Category:
Athletes Passed
2659
Passed By
847
Net Change
+1811
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11149
5K → 10K276229+47#11149#11102
10K → 15K47022+448#11102#10654
15K → 20K27073+197#10654#10457
20K → Half6914+55#10457#10402
Half → 25K190107+83#10402#10319
25K → 30K352110+241#10319#10078
30K → 20M20332+171#10078#9907
20M → 21M12173+48#9907#9859
21M → 35K11417+97#9859#9762
35K → 23M16051+109#9762#9653
23M → 24M14234+108#9653#9545
24M → 40K9442+52#9545#9493
40K → 25.2M7610+66#9493#9427
25.2M → Finish12233+89#9427#9338
TOTALS2659847+1811
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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