Boston Marathon logo
BOSTON MARATHON 2025

Niall Kirwan

Bib: 28584•M

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

Start
0:00:00
Race begins
5K· 3.11 mi
34:16
Rank: #27590
Start → 5K
34:16 | 11:02/mi
10K· 6.21 mi
1:09:54
Rank: #27597 (-7)
5K → 10K
35:38 | 11:28/mi
15K· 9.32 mi
1:46:19
Rank: #27541 (+56)
10K → 15K
36:25 | 11:43/mi
20K· 12.43 mi
2:27:44
Rank: #27732 (-191)
15K → 20K
41:25 | 13:20/mi
Half· 13.11 mi
2:35:57
Rank: #27727 (+5)
20K → Half
8:13 | 12:03/mi
25K· 15.53 mi
3:10:43
Rank: #27814 (-87)
Half → 25K
34:46 | 14:20/mi
30K· 18.64 mi
3:56:01
Rank: #27844 (-30)
25K → 30K
45:18 | 14:35/mi
20M
4:14:13
Rank: #27791 (+53)
30K → 20M
18:12 | 13:24/mi
21M
4:29:07
Rank: #27762 (+29)
20M → 21M
14:54 | 14:54/mi
35K· 21.75 mi
4:39:06
Rank: #27756 (+6)
21M → 35K
9:59 | 13:21/mi
23M
4:55:38
Rank: #27722 (+34)
35K → 23M
16:32 | 13:12/mi
24M
5:08:15
Rank: #27677 (+45)
23M → 24M
12:37 | 12:37/mi
40K· 24.85 mi
5:21:01
Rank: #27710 (-33)
24M → 40K
12:46 | 14:56/mi
25.2M
5:26:16
Rank: #27707 (+3)
40K → 25.2M
5:15 | 15:13/mi
Finish· 26.22 mi
5:39:03
Rank: #27705 (+2)
25.2M → Finish
12:47 | 12:33/mi

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
Time2:35:57
Pace11:54 /mi
2nd Half
Distance13.11 mi
Time3:03:06
Pace13:58 /mi
📊Positive Split: 17.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:59:4034:1611:0234:16
11:02
-
10K
6.21 mi12:35:181:09:5411:1535:38
11:28
+0:26
15K
9.32 mi13:11:431:46:1911:2436:25
11:43
+0:15
20K
12.43 mi13:53:082:27:4411:5341:25
13:20
+1:37
Half
13.11 mi14:01:212:35:5711:548:13
12:03
-1:17
25K
15.53 mi14:36:073:10:4312:1734:46
14:20
+2:17
30K
18.64 mi15:21:253:56:0112:4045:18
14:35
+0:15
20M
20.00 mi15:39:374:14:1312:4318:12
13:24
-1:11
21M
21.00 mi15:54:314:29:0712:4914:54
14:54
+1:30
35K
21.75 mi16:04:304:39:0612:509:59
13:21
-1:33
23M
23.00 mi16:21:024:55:3812:5116:32
13:12
-0:09
24M
24.00 mi16:33:395:08:1512:5112:37
12:37
-0:35
40K
24.85 mi16:46:255:21:0112:5512:46
14:56
+2:19
25.2M
25.20 mi16:51:405:26:1612:575:15
15:13
+0:17
Finish
26.22 mi17:04:275:39:0312:5612:47
12:33
-2:40

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

11:02 /mi

Average Pace

12:56 /mi

Slowest Pace

15:13 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:19:56

41% of race

Time at Steady Pace

1:26:08

25% of race

Time at Slower Pace

1:52:59

33% of race

Average Pace: 12:56 /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 mi11:59:4034:1611:0234:16
11:02
#27590
10K
6.21 mi12:35:181:09:5411:1535:38
11:28
#27597
15K
9.32 mi13:11:431:46:1911:2436:25
11:43
#27541
20K
12.43 mi13:53:082:27:4411:5341:25
13:20
#27732
Half
13.11 mi14:01:212:35:5711:548:13
12:03
#27727
25K
15.53 mi14:36:073:10:4312:1734:46
14:20
#27814
30K
18.64 mi15:21:253:56:0112:4045:18
14:35
#27844
20M
20.00 mi15:39:374:14:1312:4318:12
13:24
#27791
21M
21.00 mi15:54:314:29:0712:4914:54
14:54
#27762
35K
21.75 mi16:04:304:39:0612:509:59
13:21
#27756
23M
23.00 mi16:21:024:55:3812:5116:32
13:12
#27722
24M
24.00 mi16:33:395:08:1512:5112:37
12:37
#27677
40K
24.85 mi16:46:255:21:0112:5512:46
14:56
#27710
25.2M
25.20 mi16:51:405:26:1612:575:15
15:13
#27707
Finish
26.22 mi17:04:275:39:0312:5612:47
12:33
#27705
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi27590158191581927425(Top 97%)15717(Top 98%)15717(Top 279%)
10K6.21 mi3.10 mi27597-715827-815827-827571(Top 97%)15793(Top 98%)15793(Top 280%)
15K9.32 mi3.11 mi27541+5615789+3815789+3827425(Top 97%)15717(Top 98%)15717(Top 279%)
20K12.43 mi3.11 mi27732-19115846-5715846-5727995(Top 99%)15931(Top 99%)15931(Top 282%)
Half13.11 mi0.68 mi27727+515843+315843+327490(Top 97%)15713(Top 98%)15713(Top 279%)
25K15.53 mi2.42 mi27814-8715881-3815881-3828043(Top 99%)15934(Top 99%)15934(Top 282%)
30K18.64 mi3.11 mi27844-3015883-215883-227845(Top 98%)15799(Top 98%)15799(Top 280%)
20M20.00 mi1.36 mi27791+5315851+3215851+3226795(Top 94%)15279(Top 95%)15279(Top 271%)
21M21.00 mi1.00 mi27762+2915834+1715834+1727071(Top 95%)15404(Top 96%)15404(Top 273%)
35K21.75 mi0.75 mi27756+615827+715827+727254(Top 96%)15465(Top 96%)15465(Top 274%)
23M23.00 mi1.25 mi27722+3415808+1915808+1926622(Top 94%)15146(Top 94%)15146(Top 268%)
24M24.00 mi1.00 mi27677+4515779+2915779+2926450(Top 93%)15040(Top 93%)15040(Top 267%)
40K24.85 mi0.85 mi27710-3315787-815787-827735(Top 98%)15683(Top 97%)15683(Top 278%)
25.2M25.20 mi0.35 mi27707+315784+315784+327282(Top 96%)15426(Top 96%)15426(Top 273%)
Finish26.22 mi1.02 mi27705+215777+715777+727327(Top 96%)15474(Top 96%)15474(Top 274%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 97%
×21stories
+97ft-345ft

Overall

27425

Males

15717

M18-39

15717

5K→10K

3.1 - 6.2 mi

Top 97%
×5stories
+79ft-138ft

Overall

27571

Males

15793

M18-39

15793

10K→15K

6.2 - 9.3 mi

Top 97%
×3stories
+67ft-78ft

Overall

27425

Males

15717

M18-39

15717

15K→20K

9.3 - 12.4 mi

Top 99%
×5stories
+106ft-86ft

Overall

27995

Males

15931

M18-39

15931

20K→Half

12.4 - 13.1 mi

Top 97%
×2stories
+19ft-37ft

Overall

27490

Males

15713

M18-39

15713

Half→25K

13.1 - 15.5 mi

Top 99%
×4stories
+66ft-88ft

Overall

28043

Males

15934

M18-39

15934

25K→30K

15.5 - 18.6 mi

Top 98%
×9stories
+181ft-148ft

Overall

27845

Males

15799

M18-39

15799

30K→20M

18.6 - 20.0 mi

Top 94%
×5stories
+64ft-50ft

Overall

26795

Males

15279

M18-39

15279

20M→21M

20.0 - 21.0 mi

Top 95%
×8stories
+106ft-24ft

Overall

27071

Males

15404

M18-39

15404

21M→35K

21.0 - 21.8 mi

Top 96%
×7stories
+17ft-86ft

Overall

27254

Males

15465

M18-39

15465

35K→23M

21.8 - 23.0 mi

Top 94%
×5stories
+23ft-63ft

Overall

26622

Males

15146

M18-39

15146

23M→24M

23.0 - 24.0 mi

Top 93%
×6stories
+12ft-82ft

Overall

26450

Males

15040

M18-39

15040

24M→40K

24.0 - 24.9 mi

Top 98%
×1story
+6ft-20ft

Overall

27735

Males

15683

M18-39

15683

40K→25.2M

24.9 - 25.2 mi

Top 96%
×1story
+13ft-16ft

Overall

27282

Males

15426

M18-39

15426

25.2M→Finish

25.2 - 26.2 mi

Top 96%
×2stories
+22ft-21ft

Overall

27327

Males

15474

M18-39

15474

Passing Analysis

Category:
Athletes Passed
553
Passed By
668
Net Change
-115
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#27590
5K → 10K97104-7#27590#27597
10K → 15K11357+56#27597#27541
15K → 20K21212-191#27541#27732
20K → Half1712+5#27732#27727
Half → 25K24111-87#27727#27814
25K → 30K4878-30#27814#27844
30K → 20M563+53#27844#27791
20M → 21M3910+29#27791#27762
21M → 35K1913+6#27762#27756
35K → 23M428+34#27756#27722
23M → 24M483+45#27722#27677
24M → 40K740-33#27677#27710
40K → 25.2M52+3#27710#27707
25.2M → Finish1715+2#27707#27705
TOTALS553668-115
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

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
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing