Boston Marathon logo
BOSTON MARATHON 2025

Sean O'Neill

Bib: 27536•M

MA

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

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
8:26/mi
26:12
↑ 97↓ 3451.5%
10K· 6.21 mi
8:35/mi
52:51
↑ 79↓ 1380.4%
15K· 9.32 mi
8:31/mi
1:19:20
↑ 67↓ 78
20K· 12.43 mi
8:34/mi
1:45:56
↑ 106↓ 860.1%
Half· 13.11 mi
8:24/mi
1:51:40
↑ 19↓ 370.5%
25K· 15.53 mi
8:50/mi
2:13:06
↑ 66↓ 880.2%
30K· 18.64 mi
9:19/mi
2:42:04
↑ 181↓ 1480.2%
20M
9:48/mi
2:55:23
↑ 64↓ 500.2%
21M
10:43/mi
3:06:06
↑ 106↓ 241.6%
35K· 21.75 mi
9:52/mi
3:13:29
↑ 17↓ 861.7%
23M
10:35/mi
3:26:44
↑ 23↓ 630.6%
24M
10:53/mi
3:37:37
↓ 821.3%
40K· 24.85 mi
11:50/mi
3:47:44
↓ 200.3%
25.2M
14:56/mi
3:52:53
↑ 13↓ 160.2%
Finish· 26.22 mi
11:22/mi
4:04:28
↑ 22↓ 21

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
Time1:51:40
Pace8:31 /mi
2nd Half
Distance13.11 mi
Time2:12:48
Pace10:08 /mi
📊Positive Split: 18.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:41:5726:128:2626:12
8:26
-
10K
6.21 mi12:08:3652:518:3026:39
8:35
+0:09
15K
9.32 mi12:35:051:19:208:3126:29
8:31
-0:04
20K
12.43 mi13:01:411:45:568:3126:36
8:34
+0:03
Half
13.11 mi13:07:251:51:408:315:44
8:24
-0:10
25K
15.53 mi13:28:512:13:068:3421:26
8:50
+0:26
30K
18.64 mi13:57:492:42:048:4228:58
9:19
+0:29
20M
20.00 mi14:11:082:55:238:4613:19
9:48
+0:29
21M
21.00 mi14:21:513:06:068:5210:43
10:43
+0:55
35K
21.75 mi14:29:143:13:298:547:23
9:52
-0:51
23M
23.00 mi14:42:293:26:448:5913:15
10:35
+0:43
24M
24.00 mi14:53:223:37:379:0410:53
10:53
+0:18
40K
24.85 mi15:03:293:47:449:1010:07
11:50
+0:57
25.2M
25.20 mi15:08:383:52:539:145:09
14:56
+3:06
Finish
26.22 mi15:20:134:04:289:2011:35
11:22
-3:34

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

8:24 /mi

Average Pace

9:20 /mi

Slowest Pace

14:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:13:06

54% of race

Time at Steady Pace

1:02:55

26% of race

Time at Slower Pace

48:27

20% of race

Average Pace: 9:19 /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 mi11:41:5726:128:2626:12
8:26
#19482
10K
6.21 mi12:08:3652:518:3026:39
8:35
#19868
15K
9.32 mi12:35:051:19:208:3126:29
8:31
#19746
20K
12.43 mi13:01:411:45:568:3126:36
8:34
#19413
Half
13.11 mi13:07:251:51:408:315:44
8:24
#19377
25K
15.53 mi13:28:512:13:068:3421:26
8:50
#19315
30K
18.64 mi13:57:492:42:048:4228:58
9:19
#19302
20M
20.00 mi14:11:082:55:238:4613:19
9:48
#19399
21M
21.00 mi14:21:513:06:068:5210:43
10:43
#19498
35K
21.75 mi14:29:143:13:298:547:23
9:52
#19624
23M
23.00 mi14:42:293:26:448:5913:15
10:35
#19856
24M
24.00 mi14:53:223:37:379:0410:53
10:53
#20131
40K
24.85 mi15:03:293:47:449:1010:07
11:50
#20464
25.2M
25.20 mi15:08:383:52:539:145:09
14:56
#20696
Finish
26.22 mi15:20:134:04:289:2011:35
11:22
#20962
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi19482122431224319471(Top 69%)12264(Top 76%)12264(Top 217%)
10K6.21 mi3.10 mi19868-38612417-17412417-17420239(Top 71%)12584(Top 78%)12584(Top 223%)
15K9.32 mi3.11 mi19746+12212371+4612371+4619471(Top 69%)12264(Top 76%)12264(Top 217%)
20K12.43 mi3.11 mi19413+33312221+15012221+15018614(Top 66%)11870(Top 74%)11870(Top 210%)
Half13.11 mi0.68 mi19377+3612201+2012201+2018609(Top 66%)11882(Top 74%)11882(Top 211%)
25K15.53 mi2.42 mi19315+6212164+3712164+3719149(Top 67%)12047(Top 75%)12047(Top 214%)
30K18.64 mi3.11 mi19302+1312118+4612118+4619217(Top 68%)11932(Top 74%)11932(Top 211%)
20M20.00 mi1.36 mi19399-9712139-2112139-2120295(Top 71%)12282(Top 76%)12282(Top 218%)
21M21.00 mi1.00 mi19498-9912158-1912158-1920636(Top 73%)12320(Top 76%)12320(Top 218%)
35K21.75 mi0.75 mi19624-12612197-3912197-3921518(Top 76%)12678(Top 79%)12678(Top 225%)
23M23.00 mi1.25 mi19856-23212259-6212259-6222206(Top 78%)12976(Top 81%)12976(Top 230%)
24M24.00 mi1.00 mi20131-27512367-10812367-10823726(Top 84%)13673(Top 85%)13673(Top 242%)
40K24.85 mi0.85 mi20464-33312509-14212509-14224669(Top 87%)14093(Top 88%)14093(Top 250%)
25.2M25.20 mi0.35 mi20696-23212609-10012609-10027072(Top 95%)15301(Top 95%)15301(Top 271%)
Finish26.22 mi1.02 mi20962-26612703-9412703-9425959(Top 91%)14760(Top 92%)14760(Top 262%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 69%
×21story building
+97ft-345ft

Overall

19471

Males

12264

M18-39

12264

5K→10K

3.1 - 6.2 mi

Top 71%
×5story building
+79ft-138ft

Overall

20239

Males

12584

M18-39

12584

10K→15K

6.2 - 9.3 mi

Top 69%
×3story building
+67ft-78ft

Overall

19471

Males

12264

M18-39

12264

15K→20K

9.3 - 12.4 mi

Top 66%
×5story building
+106ft-86ft

Overall

18614

Males

11870

M18-39

11870

20K→Half

12.4 - 13.1 mi

Top 66%
×2story building
+19ft-37ft

Overall

18609

Males

11882

M18-39

11882

Half→25K

13.1 - 15.5 mi

Top 67%
×4story building
+66ft-88ft

Overall

19149

Males

12047

M18-39

12047

25K→30K

15.5 - 18.6 mi

Top 68%
×9story building
+181ft-148ft

Overall

19217

Males

11932

M18-39

11932

30K→20M

18.6 - 20.0 mi

Top 71%
×5story building
+64ft-50ft

Overall

20295

Males

12282

M18-39

12282

20M→21M

20.0 - 21.0 mi

Top 73%
×8story building
+106ft-24ft

Overall

20636

Males

12320

M18-39

12320

21M→35K

21.0 - 21.8 mi

Top 76%
×7story building
+17ft-86ft

Overall

21518

Males

12678

M18-39

12678

35K→23M

21.8 - 23.0 mi

Top 78%
×5story building
+23ft-63ft

Overall

22206

Males

12976

M18-39

12976

23M→24M

23.0 - 24.0 mi

Top 84%
×6story building
+12ft-82ft

Overall

23726

Males

13673

M18-39

13673

24M→40K

24.0 - 24.9 mi

Top 87%
×1story
+6ft-20ft

Overall

24669

Males

14093

M18-39

14093

40K→25.2M

24.9 - 25.2 mi

Top 95%
×1story
+13ft-16ft

Overall

27072

Males

15301

M18-39

15301

25.2M→Finish

25.2 - 26.2 mi

Top 91%
×2story building
+22ft-21ft

Overall

25959

Males

14760

M18-39

14760

Passing Analysis

Category:
Athletes Passed
1482
Passed By
2962
Net Change
-1480
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19482
5K → 10K131517-386#19482#19868
10K → 15K249127+122#19868#19746
15K → 20K39057+333#19746#19413
20K → Half5115+36#19413#19377
Half → 25K194132+62#19377#19315
25K → 30K222209+13#19315#19302
30K → 20M76173-97#19302#19399
20M → 21M66165-99#19399#19498
21M → 35K24150-126#19498#19624
35K → 23M37269-232#19624#19856
23M → 24M17292-275#19856#20131
24M → 40K16349-333#20131#20464
40K → 25.2M2234-232#20464#20696
25.2M → Finish7273-266#20696#20962
TOTALS14822962-1480
📊

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