Boston Marathon logo
BOSTON MARATHON 2025

Simon Low

Bib: 2455•M

VA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Top 4%
Gender (Male)
#0 / 16105
Top 6%
Division (M18-39)
#0 / 5642
Top 15%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
18:38
Rank: #1073
Start → 5K
18:38 | 6:00/mi
10K· 6.21 mi
37:24
Rank: #1128 (-55)
5K → 10K
18:46 | 6:02/mi
15K· 9.32 mi
56:05
Rank: #1097 (+31)
10K → 15K
18:41 | 6:01/mi
20K· 12.43 mi
1:14:56
Rank: #1075 (+22)
15K → 20K
18:51 | 6:04/mi
Half· 13.11 mi
1:19:02
Rank: #1076 (-1)
20K → Half
4:06 | 6:01/mi
25K· 15.53 mi
1:33:46
Rank: #1048 (+28)
Half → 25K
14:44 | 6:05/mi
30K· 18.64 mi
1:52:59
Rank: #997 (+51)
25K → 30K
19:13 | 6:11/mi
20M
2:01:31
Rank: #961 (+36)
30K → 20M
8:32 | 6:17/mi
21M
2:08:08
Rank: #949 (+12)
20M → 21M
6:37 | 6:37/mi
35K· 21.75 mi
2:12:47
Rank: #944 (+5)
21M → 35K
4:39 | 6:13/mi
23M
2:20:54
Rank: #945 (-1)
35K → 23M
8:07 | 6:29/mi
24M
2:27:24
Rank: #970 (-25)
23M → 24M
6:30 | 6:30/mi
40K· 24.85 mi
2:33:12
Rank: #1000 (-30)
24M → 40K
5:48 | 6:47/mi
25.2M
2:35:44
Rank: #1015 (-15)
40K → 25.2M
2:32 | 7:21/mi
Finish· 26.22 mi
2:42:19
Rank: #1040 (-25)
25.2M → Finish
6:35 | 6:28/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
Time1:19:02
Pace6:02 /mi
2nd Half
Distance13.11 mi
Time1:23:17
Pace6:21 /mi
📊Positive Split: 5.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:20:3118:386:0018:38
6:00
-
10K
6.21 mi10:39:1737:246:0118:46
6:02
+0:02
15K
9.32 mi10:57:5856:056:0118:41
6:01
-0:01
20K
12.43 mi11:16:491:14:566:0218:51
6:04
+0:03
Half
13.11 mi11:20:551:19:026:024:06
6:01
-0:03
25K
15.53 mi11:35:391:33:466:0214:44
6:05
+0:04
30K
18.64 mi11:54:521:52:596:0419:13
6:11
+0:06
20M
20.00 mi12:03:242:01:316:058:32
6:17
+0:06
21M
21.00 mi12:10:012:08:086:066:37
6:37
+0:20
35K
21.75 mi12:14:402:12:476:064:39
6:13
-0:24
23M
23.00 mi12:22:472:20:546:088:07
6:29
+0:16
24M
24.00 mi12:29:172:27:246:096:30
6:30
+0:01
40K
24.85 mi12:35:052:33:126:105:48
6:47
+0:17
25.2M
25.20 mi12:37:372:35:446:112:32
7:21
+0:34
Finish
26.22 mi12:44:122:42:196:126:35
6:28
-0:53

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

6:00 /mi

Average Pace

6:12 /mi

Slowest Pace

7:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:00:11

37% of race

Time at Steady Pace

1:05:59

41% of race

Time at Slower Pace

36:09

22% of race

Average Pace: 6:11 /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 mi10:20:3118:386:0018:38
6:00
#1073
10K
6.21 mi10:39:1737:246:0118:46
6:02
#1128
15K
9.32 mi10:57:5856:056:0118:41
6:01
#1097
20K
12.43 mi11:16:491:14:566:0218:51
6:04
#1075
Half
13.11 mi11:20:551:19:026:024:06
6:01
#1076
25K
15.53 mi11:35:391:33:466:0214:44
6:05
#1048
30K
18.64 mi11:54:521:52:596:0419:13
6:11
#997
20M
20.00 mi12:03:242:01:316:058:32
6:17
#961
21M
21.00 mi12:10:012:08:086:066:37
6:37
#949
35K
21.75 mi12:14:402:12:476:064:39
6:13
#944
23M
23.00 mi12:22:472:20:546:088:07
6:29
#945
24M
24.00 mi12:29:172:27:246:096:30
6:30
#970
40K
24.85 mi12:35:052:33:126:105:48
6:47
#1000
25.2M
25.20 mi12:37:372:35:446:112:32
7:21
#1015
Finish
26.22 mi12:44:122:42:196:126:35
6:28
#1040
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi1073101410141076(Top 4%)1017(Top 6%)1017(Top 18%)
10K6.21 mi3.10 mi1128-551065-511065-511227(Top 4%)1163(Top 7%)1163(Top 21%)
15K9.32 mi3.11 mi1097+311036+291036+291076(Top 4%)1017(Top 6%)1017(Top 18%)
20K12.43 mi3.11 mi1075+221015+211015+211063(Top 4%)1002(Top 6%)1002(Top 18%)
Half13.11 mi0.68 mi1076-11016-11016-11166(Top 4%)1103(Top 7%)1103(Top 20%)
25K15.53 mi2.42 mi1048+28987+29987+291018(Top 4%)961(Top 6%)961(Top 17%)
30K18.64 mi3.11 mi997+51940+47940+47875(Top 3%)819(Top 5%)819(Top 15%)
20M20.00 mi1.36 mi961+36903+37903+37909(Top 3%)857(Top 5%)857(Top 15%)
21M21.00 mi1.00 mi949+12894+9894+9959(Top 3%)909(Top 6%)909(Top 16%)
35K21.75 mi0.75 mi944+5888+6888+61255(Top 4%)1185(Top 7%)1185(Top 21%)
23M23.00 mi1.25 mi945-1889-1889-11393(Top 5%)1310(Top 8%)1310(Top 23%)
24M24.00 mi1.00 mi970-25913-24913-242019(Top 7%)1872(Top 12%)1872(Top 33%)
40K24.85 mi0.85 mi1000-30941-28941-282727(Top 10%)2471(Top 15%)2471(Top 44%)
25.2M25.20 mi0.35 mi1015-15954-13954-132641(Top 9%)2343(Top 15%)2343(Top 42%)
Finish26.22 mi1.02 mi1040-25978-24978-242579(Top 9%)2329(Top 14%)2329(Top 41%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 4%
×21stories
+97ft-345ft

Overall

1076

Males

1017

M18-39

1017

5K→10K

3.1 - 6.2 mi

Top 4%
×5stories
+79ft-138ft

Overall

1227

Males

1163

M18-39

1163

10K→15K

6.2 - 9.3 mi

Top 4%
×3stories
+67ft-78ft

Overall

1076

Males

1017

M18-39

1017

15K→20K

9.3 - 12.4 mi

Top 4%
×5stories
+106ft-86ft

Overall

1063

Males

1002

M18-39

1002

20K→Half

12.4 - 13.1 mi

Top 4%
×2stories
+19ft-37ft

Overall

1166

Males

1103

M18-39

1103

Half→25K

13.1 - 15.5 mi

Top 4%
×4stories
+66ft-88ft

Overall

1018

Males

961

M18-39

961

25K→30K

15.5 - 18.6 mi

Top 3%
×9stories
+181ft-148ft

Overall

875

Males

819

M18-39

819

30K→20M

18.6 - 20.0 mi

Top 3%
×5stories
+64ft-50ft

Overall

909

Males

857

M18-39

857

20M→21M

20.0 - 21.0 mi

Top 3%
×8stories
+106ft-24ft

Overall

959

Males

909

M18-39

909

21M→35K

21.0 - 21.8 mi

Top 4%
×7stories
+17ft-86ft

Overall

1255

Males

1185

M18-39

1185

35K→23M

21.8 - 23.0 mi

Top 5%
×5stories
+23ft-63ft

Overall

1393

Males

1310

M18-39

1310

23M→24M

23.0 - 24.0 mi

Top 7%
×6stories
+12ft-82ft

Overall

2019

Males

1872

M18-39

1872

24M→40K

24.0 - 24.9 mi

Top 10%
×1story
+6ft-20ft

Overall

2727

Males

2471

M18-39

2471

40K→25.2M

24.9 - 25.2 mi

Top 9%
×1story
+13ft-16ft

Overall

2641

Males

2343

M18-39

2343

25.2M→Finish

25.2 - 26.2 mi

Top 9%
×2stories
+22ft-21ft

Overall

2579

Males

2329

M18-39

2329

Passing Analysis

Category:
Athletes Passed
381
Passed By
348
Net Change
+33
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1073
5K → 10K3186-55#1073#1128
10K → 15K4918+31#1128#1097
15K → 20K4321+22#1097#1075
20K → Half89-1#1075#1076
Half → 25K357+28#1076#1048
25K → 30K7221+51#1048#997
30K → 20M4610+36#997#961
20M → 21M2816+12#961#949
21M → 35K2116+5#949#944
35K → 23M2122-1#944#945
23M → 24M631-25#945#970
24M → 40K636-30#970#1000
40K → 25.2M722-15#1000#1015
25.2M → Finish833-25#1015#1040
TOTALS381348+33
📊

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