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BOSTON MARATHON 2025

Jason Tso

Bib: 5133•M

CA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 12%
Gender (Male)
#0 / 16105
Top 20%
Division (M18-39)
#0 / 5642
Top 44%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:12
Rank: #3853
Start → 5K
20:12 | 6:30/mi
10K· 6.21 mi
40:35
Rank: #3997 (-144)
5K → 10K
20:23 | 6:34/mi
15K· 9.32 mi
1:01:06
Rank: #4071 (-74)
10K → 15K
20:31 | 6:36/mi
20K· 12.43 mi
1:21:49
Rank: #4035 (+36)
15K → 20K
20:43 | 6:40/mi
Half· 13.11 mi
1:26:19
Rank: #4039 (-4)
20K → Half
4:30 | 6:36/mi
25K· 15.53 mi
1:42:35
Rank: #4016 (+23)
Half → 25K
16:16 | 6:43/mi
30K· 18.64 mi
2:04:00
Rank: #3957 (+59)
25K → 30K
21:25 | 6:54/mi
20M
2:13:26
Rank: #3921 (+36)
30K → 20M
9:26 | 6:57/mi
21M
2:20:43
Rank: #3855 (+66)
20M → 21M
7:17 | 7:17/mi
35K· 21.75 mi
2:25:43
Rank: #3826 (+29)
21M → 35K
5:00 | 6:41/mi
23M
2:34:29
Rank: #3786 (+40)
35K → 23M
8:46 | 7:00/mi
24M
2:41:13
Rank: #3735 (+51)
23M → 24M
6:44 | 6:44/mi
40K· 24.85 mi
2:47:05
Rank: #3671 (+64)
24M → 40K
5:52 | 6:52/mi
25.2M
2:49:38
Rank: #3635 (+36)
40K → 25.2M
2:33 | 7:24/mi
Finish· 26.22 mi
2:56:03
Rank: #3505 (+130)
25.2M → Finish
6:25 | 6:18/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:26:19
Pace6:35 /mi
2nd Half
Distance13.11 mi
Time1:29:44
Pace6:51 /mi
📊Positive Split: 4.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:5220:126:3020:12
6:30
-
10K
6.21 mi10:44:1540:356:3220:23
6:34
+0:04
15K
9.32 mi11:04:461:01:066:3320:31
6:36
+0:02
20K
12.43 mi11:25:291:21:496:3520:43
6:40
+0:04
Half
13.11 mi11:29:591:26:196:354:30
6:36
-0:04
25K
15.53 mi11:46:151:42:356:3616:16
6:43
+0:07
30K
18.64 mi12:07:402:04:006:3921:25
6:54
+0:11
20M
20.00 mi12:17:062:13:266:409:26
6:57
+0:03
21M
21.00 mi12:24:232:20:436:427:17
7:17
+0:20
35K
21.75 mi12:29:232:25:436:425:00
6:41
-0:36
23M
23.00 mi12:38:092:34:296:438:46
7:00
+0:19
24M
24.00 mi12:44:532:41:136:436:44
6:44
-0:16
40K
24.85 mi12:50:452:47:056:435:52
6:52
+0:08
25.2M
25.20 mi12:53:182:49:386:442:33
7:24
+0:32
Finish
26.22 mi12:59:432:56:036:436:25
6:18
-1:06

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

6:18 /mi

Average Pace

6:43 /mi

Slowest Pace

7:24 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:28:01

84% of race

Time at Steady Pace

28:02

16% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:43 /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 mi10:23:5220:126:3020:12
6:30
#3853
10K
6.21 mi10:44:1540:356:3220:23
6:34
#3997
15K
9.32 mi11:04:461:01:066:3320:31
6:36
#4071
20K
12.43 mi11:25:291:21:496:3520:43
6:40
#4035
Half
13.11 mi11:29:591:26:196:354:30
6:36
#4039
25K
15.53 mi11:46:151:42:356:3616:16
6:43
#4016
30K
18.64 mi12:07:402:04:006:3921:25
6:54
#3957
20M
20.00 mi12:17:062:13:266:409:26
6:57
#3921
21M
21.00 mi12:24:232:20:436:427:17
7:17
#3855
35K
21.75 mi12:29:232:25:436:425:00
6:41
#3826
23M
23.00 mi12:38:092:34:296:438:46
7:00
#3786
24M
24.00 mi12:44:532:41:136:436:44
6:44
#3735
40K
24.85 mi12:50:452:47:056:435:52
6:52
#3671
25.2M
25.20 mi12:53:182:49:386:442:33
7:24
#3635
Finish
26.22 mi12:59:432:56:036:436:25
6:18
#3505
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi3853364636464265(Top 15%)4009(Top 25%)4009(Top 71%)
10K6.21 mi3.10 mi3997-1443778-1323778-1324158(Top 15%)3911(Top 24%)3911(Top 69%)
15K9.32 mi3.11 mi4071-743840-623840-624265(Top 15%)4009(Top 25%)4009(Top 71%)
20K12.43 mi3.11 mi4035+363800+403800+404169(Top 15%)3911(Top 24%)3911(Top 69%)
Half13.11 mi0.68 mi4039-43801-13801-14389(Top 15%)4111(Top 26%)4111(Top 73%)
25K15.53 mi2.42 mi4016+233777+243777+244213(Top 15%)3915(Top 24%)3915(Top 69%)
30K18.64 mi3.11 mi3957+593720+573720+574033(Top 14%)3717(Top 23%)3717(Top 66%)
20M20.00 mi1.36 mi3921+363682+383682+383773(Top 13%)3472(Top 22%)3472(Top 62%)
21M21.00 mi1.00 mi3855+663620+623620+623559(Top 13%)3258(Top 20%)3258(Top 58%)
35K21.75 mi0.75 mi3826+293590+303590+303434(Top 12%)3133(Top 19%)3133(Top 56%)
23M23.00 mi1.25 mi3786+403544+463544+463775(Top 13%)3398(Top 21%)3398(Top 60%)
24M24.00 mi1.00 mi3735+513489+553489+553149(Top 11%)2845(Top 18%)2845(Top 50%)
40K24.85 mi0.85 mi3671+643427+623427+623174(Top 11%)2847(Top 18%)2847(Top 50%)
25.2M25.20 mi0.35 mi3635+363391+363391+362970(Top 10%)2649(Top 16%)2649(Top 47%)
Finish26.22 mi1.02 mi3505+1303273+1183273+1181899(Top 7%)1754(Top 11%)1754(Top 31%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 15%
×21stories
+97ft-345ft

Overall

4265

Males

4009

M18-39

4009

5K→10K

3.1 - 6.2 mi

Top 15%
×5stories
+79ft-138ft

Overall

4158

Males

3911

M18-39

3911

10K→15K

6.2 - 9.3 mi

Top 15%
×3stories
+67ft-78ft

Overall

4265

Males

4009

M18-39

4009

15K→20K

9.3 - 12.4 mi

Top 15%
×5stories
+106ft-86ft

Overall

4169

Males

3911

M18-39

3911

20K→Half

12.4 - 13.1 mi

Top 15%
×2stories
+19ft-37ft

Overall

4389

Males

4111

M18-39

4111

Half→25K

13.1 - 15.5 mi

Top 15%
×4stories
+66ft-88ft

Overall

4213

Males

3915

M18-39

3915

25K→30K

15.5 - 18.6 mi

Top 14%
×9stories
+181ft-148ft

Overall

4033

Males

3717

M18-39

3717

30K→20M

18.6 - 20.0 mi

Top 13%
×5stories
+64ft-50ft

Overall

3773

Males

3472

M18-39

3472

20M→21M

20.0 - 21.0 mi

Top 13%
×8stories
+106ft-24ft

Overall

3559

Males

3258

M18-39

3258

21M→35K

21.0 - 21.8 mi

Top 12%
×7stories
+17ft-86ft

Overall

3434

Males

3133

M18-39

3133

35K→23M

21.8 - 23.0 mi

Top 13%
×5stories
+23ft-63ft

Overall

3775

Males

3398

M18-39

3398

23M→24M

23.0 - 24.0 mi

Top 11%
×6stories
+12ft-82ft

Overall

3149

Males

2845

M18-39

2845

24M→40K

24.0 - 24.9 mi

Top 11%
×1story
+6ft-20ft

Overall

3174

Males

2847

M18-39

2847

40K→25.2M

24.9 - 25.2 mi

Top 10%
×1story
+13ft-16ft

Overall

2970

Males

2649

M18-39

2649

25.2M→Finish

25.2 - 26.2 mi

Top 7%
×2stories
+22ft-21ft

Overall

1899

Males

1754

M18-39

1754

Passing Analysis

Category:
Athletes Passed
1145
Passed By
797
Net Change
+348
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3853
5K → 10K89233-144#3853#3997
10K → 15K55129-74#3997#4071
15K → 20K12084+36#4071#4035
20K → Half1317-4#4035#4039
Half → 25K9370+23#4039#4016
25K → 30K15394+59#4016#3957
30K → 20M6731+36#3957#3921
20M → 21M9529+66#3921#3855
21M → 35K4415+29#3855#3826
35K → 23M8747+40#3826#3786
23M → 24M7019+51#3786#3735
24M → 40K7814+64#3735#3671
40K → 25.2M4711+36#3671#3635
25.2M → Finish1344+130#3635#3505
TOTALS1145797+348
📊

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