Boston Marathon logo
BOSTON MARATHON 2025

Kojin Oshiba

CA

Bib: 2921 M

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Top 45%
Gender (Male)
#0 / 16105
Division (M18-39)
#0 / 5642
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
7:45/mi
24:04
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
7:48/mi
48:19
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:37/mi
1:12:00
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
7:35/mi
1:35:35
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
7:31/mi
1:40:43
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
7:35/mi
1:59:06
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
8:00/mi
2:23:57
↑ 181↓ 1480.2%
138 ft elev
20M
8:06/mi
2:34:57
↑ 64↓ 500.2%
148 ft elev
21M
8:52/mi
2:43:49
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
8:07/mi
2:49:53
↑ 17↓ 861.7%
156 ft elev
23M
8:42/mi
3:00:46
↑ 23↓ 630.6%
116 ft elev
24M
8:38/mi
3:09:24
↓ 821.3%
34 ft elev
40K· 24.85 mi
8:37/mi
3:16:46
↓ 200.3%
20 ft elev
25.2M
9:20/mi
3:19:59
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
8:20/mi
3:28:29
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Is this your race?

Claim it for a free AI report

A coach's-eye read of your race — emailed to you, free.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:40:43
Pace7:41 /mi
2nd Half
Distance13.11 mi
Time1:47:46
Pace8:13 /mi
📊Positive Split: 7.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:5024:047:4524:04
7:45
-
10K
6.21 mi11:40:0548:197:4724:15
7:48
+0:03
15K
9.32 mi12:03:461:12:007:4323:41
7:37
-0:11
20K
12.43 mi12:27:211:35:357:4123:35
7:35
-0:02
Half
13.11 mi12:32:291:40:437:415:08
7:31
-0:04
25K
15.53 mi12:50:521:59:067:4018:23
7:35
+0:04
30K
18.64 mi13:15:432:23:577:4324:51
8:00
+0:25
20M
20.00 mi13:26:432:34:577:4511:00
8:06
+0:06
21M
21.00 mi13:35:352:43:497:488:52
8:52
+0:46
35K
21.75 mi13:41:392:49:537:496:04
8:07
-0:45
23M
23.00 mi13:52:323:00:467:5210:53
8:42
+0:35
24M
24.00 mi14:01:103:09:247:548:38
8:38
-0:04
40K
24.85 mi14:08:323:16:467:557:22
8:37
-0:01
25.2M
25.20 mi14:11:453:19:597:563:13
9:20
+0:43
Finish
26.22 mi14:20:153:28:297:578:30
8:20
-1:00

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

7:31 /mi

Average Pace

7:57 /mi

Slowest Pace

9:20 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:59:06

57% of race

Time at Steady Pace

50:25

24% of race

Time at Slower Pace

38:58

19% of race

Average Pace: 7:57 /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 mi11:15:5024:047:4524:04
7:45
#14324
10K
6.21 mi11:40:0548:197:4724:15
7:48
#14541
15K
9.32 mi12:03:461:12:007:4323:41
7:37
#13969
20K
12.43 mi12:27:211:35:357:4123:35
7:35
#13285
Half
13.11 mi12:32:291:40:437:415:08
7:31
#13208
25K
15.53 mi12:50:521:59:067:4018:23
7:35
#12729
30K
18.64 mi13:15:432:23:577:4324:51
8:00
#12447
20M
20.00 mi13:26:432:34:577:4511:00
8:06
#12301
21M
21.00 mi13:35:352:43:497:488:52
8:52
#12312
35K
21.75 mi13:41:392:49:537:496:04
8:07
#12314
23M
23.00 mi13:52:323:00:467:5210:53
8:42
#12427
24M
24.00 mi14:01:103:09:247:548:38
8:38
#12574
40K
24.85 mi14:08:323:16:467:557:22
8:37
#12637
25.2M
25.20 mi14:11:453:19:597:563:13
9:20
#12638
Finish
26.22 mi14:20:153:28:297:578:30
8:20
#12736
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi14324101651016512777(Top 45%)9417(Top 58%)9417(Top 167%)
10K6.21 mi3.10 mi14541-21710235-7010235-7014842(Top 52%)10348(Top 64%)10348(Top 183%)
15K9.32 mi3.11 mi13969+5729976+2599976+25912777(Top 45%)9417(Top 58%)9417(Top 167%)
20K12.43 mi3.11 mi13285+6849651+3259651+32511508(Top 41%)8738(Top 54%)8738(Top 155%)
Half13.11 mi0.68 mi13208+779608+439608+4311881(Top 42%)8989(Top 56%)8989(Top 159%)
25K15.53 mi2.42 mi12729+4799371+2379371+23710604(Top 37%)8206(Top 51%)8206(Top 145%)
30K18.64 mi3.11 mi12447+2829177+1949177+19411362(Top 40%)8373(Top 52%)8373(Top 148%)
20M20.00 mi1.36 mi12301+1469071+1069071+10611070(Top 39%)8069(Top 50%)8069(Top 143%)
21M21.00 mi1.00 mi12312-119039+329039+3212694(Top 45%)8690(Top 54%)8690(Top 154%)
35K21.75 mi0.75 mi12314-29013+269013+2612959(Top 46%)8783(Top 55%)8783(Top 156%)
23M23.00 mi1.25 mi12427-1139029-169029-1614480(Top 51%)9386(Top 58%)9386(Top 166%)
24M24.00 mi1.00 mi12574-1479084-559084-5515328(Top 54%)9723(Top 60%)9723(Top 172%)
40K24.85 mi0.85 mi12637-639080+49080+414128(Top 50%)9055(Top 56%)9055(Top 160%)
25.2M25.20 mi0.35 mi12638-19065+159065+1513547(Top 48%)8717(Top 54%)8717(Top 155%)
Finish26.22 mi1.02 mi12736-989080-159080-1515160(Top 53%)9544(Top 59%)9544(Top 169%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 45%
×21story building
+97ft-345ft

Overall

12777

Males

9417

M18-39

9417

5K→10K

3.1 - 6.2 mi

Top 52%
×5story building
+79ft-138ft

Overall

14842

Males

10348

M18-39

10348

10K→15K

6.2 - 9.3 mi

Top 45%
×3story building
+67ft-78ft

Overall

12777

Males

9417

M18-39

9417

15K→20K

9.3 - 12.4 mi

Top 41%
×5story building
+106ft-86ft

Overall

11508

Males

8738

M18-39

8738

20K→Half

12.4 - 13.1 mi

Top 42%
×2story building
+19ft-37ft

Overall

11881

Males

8989

M18-39

8989

Half→25K

13.1 - 15.5 mi

Top 37%
×4story building
+66ft-88ft

Overall

10604

Males

8206

M18-39

8206

25K→30K

15.5 - 18.6 mi

Top 40%
×9story building
+181ft-148ft

Overall

11362

Males

8373

M18-39

8373

30K→20M

18.6 - 20.0 mi

Top 39%
×5story building
+64ft-50ft

Overall

11070

Males

8069

M18-39

8069

20M→21M

20.0 - 21.0 mi

Top 45%
×8story building
+106ft-24ft

Overall

12694

Males

8690

M18-39

8690

21M→35K

21.0 - 21.8 mi

Top 46%
×7story building
+17ft-86ft

Overall

12959

Males

8783

M18-39

8783

35K→23M

21.8 - 23.0 mi

Top 51%
×5story building
+23ft-63ft

Overall

14480

Males

9386

M18-39

9386

23M→24M

23.0 - 24.0 mi

Top 54%
×6story building
+12ft-82ft

Overall

15328

Males

9723

M18-39

9723

24M→40K

24.0 - 24.9 mi

Top 50%
×1story
+6ft-20ft

Overall

14128

Males

9055

M18-39

9055

40K→25.2M

24.9 - 25.2 mi

Top 48%
×1story
+13ft-16ft

Overall

13547

Males

8717

M18-39

8717

25.2M→Finish

25.2 - 26.2 mi

Top 53%
×2story building
+22ft-21ft

Overall

15160

Males

9544

M18-39

9544

Passing Analysis

Category:
Athletes Passed
3037
Passed By
1449
Net Change
+1588
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14324
5K → 10K205422-217#14324#14541
10K → 15K59018+572#14541#13969
15K → 20K6917+684#13969#13285
20K → Half847+77#13285#13208
Half → 25K4834+479#13208#12729
25K → 30K37290+282#12729#12447
30K → 20M18842+146#12447#12301
20M → 21M101112-11#12301#12312
21M → 35K6062-2#12312#12314
35K → 23M83196-113#12314#12427
23M → 24M41188-147#12427#12574
24M → 40K58121-63#12574#12637
40K → 25.2M3233-1#12637#12638
25.2M → Finish49147-98#12638#12736
TOTALS30371449+1588
📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing