Boston Marathon logo
BOSTON MARATHON 2025

Sinan Li

Bib: 30256 M SE

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
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
11:54/mi
36:57
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
11:31/mi
1:12:43
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
12:21/mi
1:51:04
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
12:04/mi
2:28:33
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
12:13/mi
2:36:53
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
13:17/mi
3:09:06
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
12:41/mi
3:48:29
↑ 181↓ 1480.2%
138 ft elev
20M
14:11/mi
4:07:46
↑ 64↓ 500.2%
148 ft elev
21M
15:19/mi
4:23:05
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
13:49/mi
4:33:25
↑ 17↓ 861.7%
156 ft elev
23M
12:36/mi
4:49:11
↑ 23↓ 630.6%
116 ft elev
24M
11:54/mi
5:01:05
↓ 821.3%
34 ft elev
40K· 24.85 mi
12:09/mi
5:11:28
↓ 200.3%
20 ft elev
25.2M
14:18/mi
5:16:24
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
12:47/mi
5:29:26
↑ 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 — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:36:53
Pace11:58 /mi
2nd Half
Distance13.11 mi
Time2:52:33
Pace13:10 /mi
📊Positive Split: 10.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:58:3636:5711:5436:57
11:54
-
10K
6.21 mi12:34:221:12:4311:4235:46
11:31
-0:23
15K
9.32 mi13:12:431:51:0411:5538:21
12:21
+0:50
20K
12.43 mi13:50:122:28:3311:5737:29
12:04
-0:17
Half
13.11 mi13:58:322:36:5311:588:20
12:13
+0:09
25K
15.53 mi14:30:453:09:0612:1032:13
13:17
+1:04
30K
18.64 mi15:10:083:48:2912:1539:23
12:41
-0:36
20M
20.00 mi15:29:254:07:4612:2319:17
14:11
+1:30
21M
21.00 mi15:44:444:23:0512:3215:19
15:19
+1:08
35K
21.75 mi15:55:044:33:2512:3410:20
13:49
-1:30
23M
23.00 mi16:10:504:49:1112:3415:46
12:36
-1:13
24M
24.00 mi16:22:445:01:0512:3311:54
11:54
-0:42
40K
24.85 mi16:33:075:11:2812:3210:23
12:09
+0:15
25.2M
25.20 mi16:38:035:16:2412:334:56
14:18
+2:09
Finish
26.22 mi16:51:055:29:2612:3413:02
12:47
-1:31

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

11:31 /mi

Average Pace

12:34 /mi

Slowest Pace

15:19 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:02:06

37% of race

Time at Steady Pace

2:05:15

38% of race

Time at Slower Pace

1:22:05

25% of race

Average Pace: 12:34 /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 mi11:58:3636:5711:5436:57
11:54
#28206
10K
6.21 mi12:34:221:12:4311:4235:46
11:31
#27956
15K
9.32 mi13:12:431:51:0411:5538:21
12:21
#27962
20K
12.43 mi13:50:122:28:3311:5737:29
12:04
#27787
Half
13.11 mi13:58:322:36:5311:588:20
12:13
#27779
25K
15.53 mi14:30:453:09:0612:1032:13
13:17
#27733
30K
18.64 mi15:10:083:48:2912:1539:23
12:41
#27536
20M
20.00 mi15:29:254:07:4612:2319:17
14:11
#27531
21M
21.00 mi15:44:444:23:0512:3215:19
15:19
#27530
35K
21.75 mi15:55:044:33:2512:3410:20
13:49
#27551
23M
23.00 mi16:10:504:49:1112:3415:46
12:36
#27503
24M
24.00 mi16:22:445:01:0512:3311:54
11:54
#27444
40K
24.85 mi16:33:075:11:2812:3210:23
12:09
#27386
25.2M
25.20 mi16:38:035:16:2412:334:56
14:18
#27374
Finish
26.22 mi16:51:055:29:2612:3413:02
12:47
#27406
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi28206160381603827847(Top 98%)15893(Top 99%)15893(Top 282%)
10K6.21 mi3.10 mi27956+25015950+8815950+8827613(Top 97%)15811(Top 98%)15811(Top 280%)
15K9.32 mi3.11 mi27962-615945+515945+527847(Top 98%)15893(Top 99%)15893(Top 282%)
20K12.43 mi3.11 mi27787+17515872+7315872+7327167(Top 96%)15603(Top 97%)15603(Top 277%)
Half13.11 mi0.68 mi27779+815869+315869+327603(Top 97%)15761(Top 98%)15761(Top 279%)
25K15.53 mi2.42 mi27733+4615844+2515844+2527493(Top 97%)15712(Top 98%)15712(Top 278%)
30K18.64 mi3.11 mi27536+19715746+9815746+9826351(Top 93%)15136(Top 94%)15136(Top 268%)
20M20.00 mi1.36 mi27531+515731+1515731+1527420(Top 97%)15577(Top 97%)15577(Top 276%)
21M21.00 mi1.00 mi27530+115728+315728+327394(Top 96%)15556(Top 97%)15556(Top 276%)
35K21.75 mi0.75 mi27551-2115730-215730-227584(Top 97%)15618(Top 97%)15618(Top 277%)
23M23.00 mi1.25 mi27503+4815714+1615714+1625919(Top 91%)14796(Top 92%)14796(Top 262%)
24M24.00 mi1.00 mi27444+5915679+3515679+3525545(Top 90%)14583(Top 91%)14583(Top 258%)
40K24.85 mi0.85 mi27386+5815653+2615653+2625153(Top 89%)14349(Top 89%)14349(Top 254%)
25.2M25.20 mi0.35 mi27374+1215643+1015643+1026586(Top 94%)15058(Top 93%)15058(Top 267%)
Finish26.22 mi1.02 mi27406-3215663-2015663-2027494(Top 97%)15559(Top 97%)15559(Top 276%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 98%
×21story building
+97ft-345ft

Overall

27847

Males

15893

M18-39

15893

5K→10K

3.1 - 6.2 mi

Top 97%
×5story building
+79ft-138ft

Overall

27613

Males

15811

M18-39

15811

10K→15K

6.2 - 9.3 mi

Top 98%
×3story building
+67ft-78ft

Overall

27847

Males

15893

M18-39

15893

15K→20K

9.3 - 12.4 mi

Top 96%
×5story building
+106ft-86ft

Overall

27167

Males

15603

M18-39

15603

20K→Half

12.4 - 13.1 mi

Top 97%
×2story building
+19ft-37ft

Overall

27603

Males

15761

M18-39

15761

Half→25K

13.1 - 15.5 mi

Top 97%
×4story building
+66ft-88ft

Overall

27493

Males

15712

M18-39

15712

25K→30K

15.5 - 18.6 mi

Top 93%
×9story building
+181ft-148ft

Overall

26351

Males

15136

M18-39

15136

30K→20M

18.6 - 20.0 mi

Top 97%
×5story building
+64ft-50ft

Overall

27420

Males

15577

M18-39

15577

20M→21M

20.0 - 21.0 mi

Top 96%
×8story building
+106ft-24ft

Overall

27394

Males

15556

M18-39

15556

21M→35K

21.0 - 21.8 mi

Top 97%
×7story building
+17ft-86ft

Overall

27584

Males

15618

M18-39

15618

35K→23M

21.8 - 23.0 mi

Top 91%
×5story building
+23ft-63ft

Overall

25919

Males

14796

M18-39

14796

23M→24M

23.0 - 24.0 mi

Top 90%
×6story building
+12ft-82ft

Overall

25545

Males

14583

M18-39

14583

24M→40K

24.0 - 24.9 mi

Top 89%
×1story
+6ft-20ft

Overall

25153

Males

14349

M18-39

14349

40K→25.2M

24.9 - 25.2 mi

Top 94%
×1story
+13ft-16ft

Overall

26586

Males

15058

M18-39

15058

25.2M→Finish

25.2 - 26.2 mi

Top 97%
×2story building
+22ft-21ft

Overall

27494

Males

15559

M18-39

15559

Passing Analysis

Category:
Athletes Passed
1029
Passed By
229
Net Change
+800
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#28206
5K → 10K2511+250#28206#27956
10K → 15K5460-6#27956#27962
15K → 20K1772+175#27962#27787
20K → Half146+8#27787#27779
Half → 25K7933+46#27779#27733
25K → 30K1992+197#27733#27536
30K → 20M3530+5#27536#27531
20M → 21M1615+1#27531#27530
21M → 35K627-21#27530#27551
35K → 23M557+48#27551#27503
23M → 24M612+59#27503#27444
24M → 40K591+58#27444#27386
40K → 25.2M153+12#27386#27374
25.2M → Finish840-32#27374#27406
TOTALS1029229+800
📊

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