Boston Marathon logo
BOSTON MARATHON 2025

William Clem

Bib: 23428•M

MD

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M65-69)
#0 / 639
Top 35%
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
8:30/mi
26:23
↑ 97↓ 3451.5%
10K· 6.21 mi
8:34/mi
52:59
↑ 79↓ 1380.4%
15K· 9.32 mi
8:41/mi
1:19:58
↑ 67↓ 78
20K· 12.43 mi
9:20/mi
1:48:58
↑ 106↓ 860.1%
Half· 13.11 mi
8:39/mi
1:54:52
↑ 19↓ 370.5%
25K· 15.53 mi
8:58/mi
2:16:36
↑ 66↓ 880.2%
30K· 18.64 mi
9:19/mi
2:45:32
↑ 181↓ 1480.2%
20M
9:10/mi
2:58:00
↑ 64↓ 500.2%
21M
9:59/mi
3:07:59
↑ 106↓ 241.6%
35K· 21.75 mi
9:37/mi
3:15:11
↑ 17↓ 861.7%
23M
8:59/mi
3:26:26
↑ 23↓ 630.6%
24M
9:02/mi
3:35:28
↓ 821.3%
40K· 24.85 mi
8:54/mi
3:43:05
↓ 200.3%
25.2M
10:58/mi
3:46:52
↑ 13↓ 160.2%
Finish· 26.22 mi
8:44/mi
3:55:46
↑ 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
Time1:54:52
Pace8:46 /mi
2nd Half
Distance13.11 mi
Time2:00:54
Pace9:13 /mi
📊Positive Split: 5.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:22:4726:238:3026:23
8:30
-
10K
6.21 mi11:49:2352:598:3226:36
8:34
+0:04
15K
9.32 mi12:16:221:19:588:3526:59
8:41
+0:07
20K
12.43 mi12:45:221:48:588:4629:00
9:20
+0:39
Half
13.11 mi12:51:161:54:528:465:54
8:39
-0:41
25K
15.53 mi13:13:002:16:368:4821:44
8:58
+0:19
30K
18.64 mi13:41:562:45:328:5328:56
9:19
+0:21
20M
20.00 mi13:54:242:58:008:5412:28
9:10
-0:09
21M
21.00 mi14:04:233:07:598:579:59
9:59
+0:49
35K
21.75 mi14:11:353:15:118:587:12
9:37
-0:22
23M
23.00 mi14:22:503:26:268:5911:15
8:59
-0:38
24M
24.00 mi14:31:523:35:288:599:02
9:02
+0:03
40K
24.85 mi14:39:293:43:058:597:37
8:54
-0:08
25.2M
25.20 mi14:43:163:46:529:003:47
10:58
+2:04
Finish
26.22 mi14:52:103:55:469:008:54
8:44
-2:14

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

8:30 /mi

Average Pace

9:00 /mi

Slowest Pace

10:58 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

58:53

25% of race

Time at Steady Pace

1:37:59

42% of race

Time at Slower Pace

1:18:54

33% of race

Average Pace: 9:00 /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 mi11:22:4726:238:3026:23
8:30
#19828
10K
6.21 mi11:49:2352:598:3226:36
8:34
#19990
15K
9.32 mi12:16:221:19:588:3526:59
8:41
#20124
20K
12.43 mi12:45:221:48:588:4629:00
9:20
#20757
Half
13.11 mi12:51:161:54:528:465:54
8:39
#20728
25K
15.53 mi13:13:002:16:368:4821:44
8:58
#20588
30K
18.64 mi13:41:562:45:328:5328:56
9:19
#20282
20M
20.00 mi13:54:242:58:008:5412:28
9:10
#20081
21M
21.00 mi14:04:233:07:598:579:59
9:59
#19955
35K
21.75 mi14:11:353:15:118:587:12
9:37
#19992
23M
23.00 mi14:22:503:26:268:5911:15
8:59
#19789
24M
24.00 mi14:31:523:35:288:599:02
9:02
#19681
40K
24.85 mi14:39:293:43:058:597:37
8:54
#19541
25.2M
25.20 mi14:43:163:46:529:003:47
10:58
#19576
Finish
26.22 mi14:52:103:55:469:008:54
8:44
#19509
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM65-69Seg. OverallSeg. MalesSeg. M65-69
5K3.11 mi3.11 mi19828123621236220392(Top 72%)12685(Top 79%)12685(Top 1985%)
10K6.21 mi3.10 mi19990-16212468-10612468-10620147(Top 71%)12546(Top 78%)12546(Top 1963%)
15K9.32 mi3.11 mi20124-13412526-5812526-5820392(Top 72%)12685(Top 79%)12685(Top 1985%)
20K12.43 mi3.11 mi20757-63312797-27112797-27122367(Top 79%)13520(Top 84%)13520(Top 2116%)
Half13.11 mi0.68 mi20728+2912784+1312784+1320034(Top 71%)12475(Top 77%)12475(Top 1952%)
25K15.53 mi2.42 mi20588+14012711+7312711+7319736(Top 69%)12296(Top 76%)12296(Top 1924%)
30K18.64 mi3.11 mi20282+30612536+17512536+17519164(Top 67%)11908(Top 74%)11908(Top 1864%)
20M20.00 mi1.36 mi20081+20112433+10312433+10317651(Top 62%)11107(Top 69%)11107(Top 1738%)
21M21.00 mi1.00 mi19955+12612356+7712356+7718232(Top 64%)11273(Top 70%)11273(Top 1764%)
35K21.75 mi0.75 mi19992-3712352+412352+420746(Top 73%)12322(Top 77%)12322(Top 1928%)
23M23.00 mi1.25 mi19789+20312231+12112231+12116164(Top 57%)10153(Top 63%)10153(Top 1589%)
24M24.00 mi1.00 mi19681+10812159+7212159+7217531(Top 62%)10713(Top 67%)10713(Top 1677%)
40K24.85 mi0.85 mi19541+14012088+7112088+7115797(Top 56%)9825(Top 61%)9825(Top 1538%)
25.2M25.20 mi0.35 mi19576-3512081+712081+720502(Top 72%)12035(Top 75%)12035(Top 1883%)
Finish26.22 mi1.02 mi19509+6712040+4112040+4117664(Top 62%)10717(Top 67%)10717(Top 1677%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 72%
×21story building
+97ft-345ft

Overall

20392

Males

12685

M65-69

12685

5K→10K

3.1 - 6.2 mi

Top 71%
×5story building
+79ft-138ft

Overall

20147

Males

12546

M65-69

12546

10K→15K

6.2 - 9.3 mi

Top 72%
×3story building
+67ft-78ft

Overall

20392

Males

12685

M65-69

12685

15K→20K

9.3 - 12.4 mi

Top 79%
×5story building
+106ft-86ft

Overall

22367

Males

13520

M65-69

13520

20K→Half

12.4 - 13.1 mi

Top 71%
×2story building
+19ft-37ft

Overall

20034

Males

12475

M65-69

12475

Half→25K

13.1 - 15.5 mi

Top 69%
×4story building
+66ft-88ft

Overall

19736

Males

12296

M65-69

12296

25K→30K

15.5 - 18.6 mi

Top 67%
×9story building
+181ft-148ft

Overall

19164

Males

11908

M65-69

11908

30K→20M

18.6 - 20.0 mi

Top 62%
×5story building
+64ft-50ft

Overall

17651

Males

11107

M65-69

11107

20M→21M

20.0 - 21.0 mi

Top 64%
×8story building
+106ft-24ft

Overall

18232

Males

11273

M65-69

11273

21M→35K

21.0 - 21.8 mi

Top 73%
×7story building
+17ft-86ft

Overall

20746

Males

12322

M65-69

12322

35K→23M

21.8 - 23.0 mi

Top 57%
×5story building
+23ft-63ft

Overall

16164

Males

10153

M65-69

10153

23M→24M

23.0 - 24.0 mi

Top 62%
×6story building
+12ft-82ft

Overall

17531

Males

10713

M65-69

10713

24M→40K

24.0 - 24.9 mi

Top 56%
×1story
+6ft-20ft

Overall

15797

Males

9825

M65-69

9825

40K→25.2M

24.9 - 25.2 mi

Top 72%
×1story
+13ft-16ft

Overall

20502

Males

12035

M65-69

12035

25.2M→Finish

25.2 - 26.2 mi

Top 62%
×2story building
+22ft-21ft

Overall

17664

Males

10717

M65-69

10717

Passing Analysis

Category:
Athletes Passed
2047
Passed By
1728
Net Change
+319
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19828
5K → 10K198360-162#19828#19990
10K → 15K139273-134#19990#20124
15K → 20K60693-633#20124#20757
20K → Half4516+29#20757#20728
Half → 25K22484+140#20728#20588
25K → 30K37367+306#20588#20282
30K → 20M21514+201#20282#20081
20M → 21M15630+126#20081#19955
21M → 35K4784-37#19955#19992
35K → 23M2096+203#19992#19789
23M → 24M12517+108#19789#19681
24M → 40K1455+140#19681#19541
40K → 25.2M2358-35#19541#19576
25.2M → Finish8821+67#19576#19509
TOTALS20471728+319
📊

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