Boston Marathon logo
BOSTON MARATHON 2025

Liam Collins

Bib: 356•M

MA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Top 1%
Gender (Male)
#0 / 16105
Top 2%
Division (M18-39)
#0 / 5642
Top 5%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
16:41
Rank: #104
Start → 5K
16:41 | 5:22/mi
10K· 6.21 mi
33:59
Rank: #178 (-74)
5K → 10K
17:18 | 5:34/mi
15K· 9.32 mi
51:27
Rank: #205 (-27)
10K → 15K
17:28 | 5:37/mi
20K· 12.43 mi
1:09:25
Rank: #238 (-33)
15K → 20K
17:58 | 5:47/mi
Half· 13.11 mi
1:13:18
Rank: #246 (-8)
20K → Half
3:53 | 5:42/mi
25K· 15.53 mi
1:27:29
Rank: #271 (-25)
Half → 25K
14:11 | 5:51/mi
30K· 18.64 mi
1:46:31
Rank: #326 (-55)
25K → 30K
19:02 | 6:08/mi
20M
1:55:08
Rank: #346 (-20)
30K → 20M
8:37 | 6:20/mi
21M
2:02:09
Rank: #385 (-39)
20M → 21M
7:01 | 7:01/mi
35K· 21.75 mi
2:06:48
Rank: #396 (-11)
21M → 35K
4:39 | 6:13/mi
23M
2:14:38
Rank: #401 (-5)
35K → 23M
7:50 | 6:15/mi
24M
2:20:46
Rank: #402 (-1)
23M → 24M
6:08 | 6:08/mi
40K· 24.85 mi
2:25:58
Rank: #395 (+7)
24M → 40K
5:12 | 6:05/mi
25.2M
2:28:10
Rank: #391 (+4)
40K → 25.2M
2:12 | 6:23/mi
Finish· 26.22 mi
2:34:00
Rank: #372 (+19)
25.2M → Finish
5:50 | 5:43/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
Time1:13:18
Pace5:35 /mi
2nd Half
Distance13.11 mi
Time1:20:42
Pace6:09 /mi
📊Positive Split: 10.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:16:4916:415:2216:41
5:22
-
10K
6.21 mi10:34:0733:595:2817:18
5:34
+0:12
15K
9.32 mi10:51:3551:275:3117:28
5:37
+0:03
20K
12.43 mi11:09:331:09:255:3517:58
5:47
+0:10
Half
13.11 mi11:13:261:13:185:353:53
5:42
-0:05
25K
15.53 mi11:27:371:27:295:3814:11
5:51
+0:09
30K
18.64 mi11:46:391:46:315:4319:02
6:08
+0:17
20M
20.00 mi11:55:161:55:085:458:37
6:20
+0:12
21M
21.00 mi12:02:172:02:095:497:01
7:01
+0:41
35K
21.75 mi12:06:562:06:485:504:39
6:13
-0:48
23M
23.00 mi12:14:462:14:385:517:50
6:15
+0:02
24M
24.00 mi12:20:542:20:465:526:08
6:08
-0:07
40K
24.85 mi12:26:062:25:585:525:12
6:05
-0:03
25.2M
25.20 mi12:28:182:28:105:532:12
6:23
+0:18
Finish
26.22 mi12:34:082:34:005:535:50
5:43
-0:40

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

5:22 /mi

Average Pace

5:53 /mi

Slowest Pace

7:01 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:33:19

61% of race

Time at Steady Pace

42:51

28% of race

Time at Slower Pace

17:50

12% of race

Average Pace: 5:52 /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 mi10:16:4916:415:2216:41
5:22
#104
10K
6.21 mi10:34:0733:595:2817:18
5:34
#178
15K
9.32 mi10:51:3551:275:3117:28
5:37
#205
20K
12.43 mi11:09:331:09:255:3517:58
5:47
#238
Half
13.11 mi11:13:261:13:185:353:53
5:42
#246
25K
15.53 mi11:27:371:27:295:3814:11
5:51
#271
30K
18.64 mi11:46:391:46:315:4319:02
6:08
#326
20M
20.00 mi11:55:161:55:085:458:37
6:20
#346
21M
21.00 mi12:02:172:02:095:497:01
7:01
#385
35K
21.75 mi12:06:562:06:485:504:39
6:13
#396
23M
23.00 mi12:14:462:14:385:517:50
6:15
#401
24M
24.00 mi12:20:542:20:465:526:08
6:08
#402
40K
24.85 mi12:26:062:25:585:525:12
6:05
#395
25.2M
25.20 mi12:28:182:28:105:532:12
6:23
#391
Finish
26.22 mi12:34:082:34:005:535:50
5:43
#372
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi104103103271(Top 1.0%)243(Top 2%)243(Top 4%)
10K6.21 mi3.10 mi178-74152-49152-49277(Top 1.0%)248(Top 2%)248(Top 4%)
15K9.32 mi3.11 mi205-27179-27179-27271(Top 1.0%)243(Top 2%)243(Top 4%)
20K12.43 mi3.11 mi238-33211-32211-32419(Top 1%)390(Top 2%)390(Top 7%)
Half13.11 mi0.68 mi246-8219-8219-8409(Top 1%)382(Top 2%)382(Top 7%)
25K15.53 mi2.42 mi271-25245-26245-26484(Top 2%)451(Top 3%)451(Top 8%)
30K18.64 mi3.11 mi326-55298-53298-53733(Top 3%)685(Top 4%)685(Top 12%)
20M20.00 mi1.36 mi346-20316-18316-181053(Top 4%)992(Top 6%)992(Top 18%)
21M21.00 mi1.00 mi385-39355-39355-392287(Top 8%)2133(Top 13%)2133(Top 38%)
35K21.75 mi0.75 mi396-11365-10365-101235(Top 4%)1165(Top 7%)1165(Top 21%)
23M23.00 mi1.25 mi401-5371-6371-6769(Top 3%)724(Top 4%)724(Top 13%)
24M24.00 mi1.00 mi402-1371371829(Top 3%)778(Top 5%)778(Top 14%)
40K24.85 mi0.85 mi395+7364+7364+7497(Top 2%)463(Top 3%)463(Top 8%)
25.2M25.20 mi0.35 mi391+4361+3361+3297(Top 1%)275(Top 2%)275(Top 5%)
Finish26.22 mi1.02 mi372+19343+18343+18386(Top 1%)362(Top 2%)362(Top 6%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 1.0%
×21stories
+97ft-345ft

Overall

271

Males

243

M18-39

243

5K→10K

3.1 - 6.2 mi

Top 1.0%
×5stories
+79ft-138ft

Overall

277

Males

248

M18-39

248

10K→15K

6.2 - 9.3 mi

Top 1.0%
×3stories
+67ft-78ft

Overall

271

Males

243

M18-39

243

15K→20K

9.3 - 12.4 mi

Top 1%
×5stories
+106ft-86ft

Overall

419

Males

390

M18-39

390

20K→Half

12.4 - 13.1 mi

Top 1%
×2stories
+19ft-37ft

Overall

409

Males

382

M18-39

382

Half→25K

13.1 - 15.5 mi

Top 2%
×4stories
+66ft-88ft

Overall

484

Males

451

M18-39

451

25K→30K

15.5 - 18.6 mi

Top 3%
×9stories
+181ft-148ft

Overall

733

Males

685

M18-39

685

30K→20M

18.6 - 20.0 mi

Top 4%
×5stories
+64ft-50ft

Overall

1053

Males

992

M18-39

992

20M→21M

20.0 - 21.0 mi

Top 8%
×8stories
+106ft-24ft

Overall

2287

Males

2133

M18-39

2133

21M→35K

21.0 - 21.8 mi

Top 4%
×7stories
+17ft-86ft

Overall

1235

Males

1165

M18-39

1165

35K→23M

21.8 - 23.0 mi

Top 3%
×5stories
+23ft-63ft

Overall

769

Males

724

M18-39

724

23M→24M

23.0 - 24.0 mi

Top 3%
×6stories
+12ft-82ft

Overall

829

Males

778

M18-39

778

24M→40K

24.0 - 24.9 mi

Top 2%
×1story
+6ft-20ft

Overall

497

Males

463

M18-39

463

40K→25.2M

24.9 - 25.2 mi

Top 1%
×1story
+13ft-16ft

Overall

297

Males

275

M18-39

275

25.2M→Finish

25.2 - 26.2 mi

Top 1%
×2stories
+22ft-21ft

Overall

386

Males

362

M18-39

362

Passing Analysis

Category:
Athletes Passed
77
Passed By
345
Net Change
-268
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#104
5K → 10K175-74#104#178
10K → 15K229-27#178#205
15K → 20K235-33#205#238
20K → Half19-8#238#246
Half → 25K530-25#246#271
25K → 30K358-55#271#326
30K → 20M525-20#326#346
20M → 21M140-39#346#385
21M → 35K213-11#385#396
35K → 23M1015-5#396#401
23M → 24M89-1#401#402
24M → 40K114+7#402#395
40K → 25.2M40+4#395#391
25.2M → Finish223+19#391#372
TOTALS77345-268
📊

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