Boston Marathon logo
BOSTON MARATHON 2025

David Marhefka

Bib: 10302•M

OH

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Top 22%
Gender (Male)
#0 / 16105
Top 34%
Masters (Masters Men)
#0 / 10463
Top 20%
Division (M45-49)
#0 / 2386
Top 27%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:38
Rank: #7514
Start → 5K
21:38 | 6:58/mi
10K· 6.21 mi
43:09
Rank: #7461 (+53)
5K → 10K
21:31 | 6:56/mi
15K· 9.32 mi
1:04:53
Rank: #7505 (-44)
10K → 15K
21:44 | 7:00/mi
20K· 12.43 mi
1:27:00
Rank: #7505
15K → 20K
22:07 | 7:07/mi
Half· 13.11 mi
1:31:46
Rank: #7494 (+11)
20K → Half
4:46 | 6:59/mi
25K· 15.53 mi
1:48:58
Rank: #7356 (+138)
Half → 25K
17:12 | 7:06/mi
30K· 18.64 mi
2:11:27
Rank: #7007 (+349)
25K → 30K
22:29 | 7:14/mi
20M
2:21:18
Rank: #6796 (+211)
30K → 20M
9:51 | 7:15/mi
21M
2:28:51
Rank: #6624 (+172)
20M → 21M
7:33 | 7:33/mi
35K· 21.75 mi
2:34:20
Rank: #6603 (+21)
21M → 35K
5:29 | 7:20/mi
23M
2:43:35
Rank: #6492 (+111)
35K → 23M
9:15 | 7:23/mi
24M
2:50:47
Rank: #6404 (+88)
23M → 24M
7:12 | 7:12/mi
40K· 24.85 mi
2:56:53
Rank: #6299 (+105)
24M → 40K
6:06 | 7:08/mi
25.2M
2:59:32
Rank: #6239 (+60)
40K → 25.2M
2:39 | 7:41/mi
Finish· 26.22 mi
3:06:28
Rank: #6115 (+124)
25.2M → Finish
6:56 | 6:48/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
Time1:31:46
Pace7:00 /mi
2nd Half
Distance13.11 mi
Time1:34:42
Pace7:13 /mi
📊Positive Split: 3.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:47:3321:386:5821:38
6:58
-
10K
6.21 mi11:09:0443:096:5721:31
6:56
-0:02
15K
9.32 mi11:30:481:04:536:5821:44
7:00
+0:04
20K
12.43 mi11:52:551:27:007:0022:07
7:07
+0:07
Half
13.11 mi11:57:411:31:467:004:46
6:59
-0:08
25K
15.53 mi12:14:531:48:587:0117:12
7:06
+0:07
30K
18.64 mi12:37:222:11:277:0322:29
7:14
+0:08
20M
20.00 mi12:47:132:21:187:049:51
7:15
+0:01
21M
21.00 mi12:54:462:28:517:057:33
7:33
+0:18
35K
21.75 mi13:00:152:34:207:065:29
7:20
-0:13
23M
23.00 mi13:09:302:43:357:079:15
7:23
+0:03
24M
24.00 mi13:16:422:50:477:077:12
7:12
-0:11
40K
24.85 mi13:22:482:56:537:076:06
7:08
-0:04
25.2M
25.20 mi13:25:272:59:327:072:39
7:41
+0:33
Finish
26.22 mi13:32:233:06:287:076:56
6:48
-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

6:48 /mi

Average Pace

7:07 /mi

Slowest Pace

7:41 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:56:16

95% of race

Time at Steady Pace

10:12

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:07 /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 mi10:47:3321:386:5821:38
6:58
#7514
10K
6.21 mi11:09:0443:096:5721:31
6:56
#7461
15K
9.32 mi11:30:481:04:536:5821:44
7:00
#7505
20K
12.43 mi11:52:551:27:007:0022:07
7:07
#7505
Half
13.11 mi11:57:411:31:467:004:46
6:59
#7494
25K
15.53 mi12:14:531:48:587:0117:12
7:06
#7356
30K
18.64 mi12:37:222:11:277:0322:29
7:14
#7007
20M
20.00 mi12:47:132:21:187:049:51
7:15
#6796
21M
21.00 mi12:54:462:28:517:057:33
7:33
#6624
35K
21.75 mi13:00:152:34:207:065:29
7:20
#6603
23M
23.00 mi13:09:302:43:357:079:15
7:23
#6492
24M
24.00 mi13:16:422:50:477:077:12
7:12
#6404
40K
24.85 mi13:22:482:56:537:076:06
7:08
#6299
25.2M
25.20 mi13:25:272:59:327:072:39
7:41
#6239
Finish
26.22 mi13:32:233:06:287:076:56
6:48
#6115
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi7514668266827587(Top 27%)6669(Top 41%)6669(Top 280%)
10K6.21 mi3.10 mi7461+536625+576625+577424(Top 26%)6581(Top 41%)6581(Top 276%)
15K9.32 mi3.11 mi7505-446646-216646-217587(Top 27%)6669(Top 41%)6669(Top 280%)
20K12.43 mi3.11 mi75056636+106636+107623(Top 27%)6624(Top 41%)6624(Top 278%)
Half13.11 mi0.68 mi7494+116625+116625+117407(Top 26%)6497(Top 40%)6497(Top 272%)
25K15.53 mi2.42 mi7356+1386512+1136512+1136913(Top 24%)6052(Top 38%)6052(Top 254%)
30K18.64 mi3.11 mi7007+3496215+2976215+2976097(Top 21%)5377(Top 33%)5377(Top 225%)
20M20.00 mi1.36 mi6796+2116030+1856030+1855478(Top 19%)4828(Top 30%)4828(Top 202%)
21M21.00 mi1.00 mi6624+1725880+1505880+1504853(Top 17%)4263(Top 26%)4263(Top 179%)
35K21.75 mi0.75 mi6603+215849+315849+317360(Top 26%)5894(Top 37%)5894(Top 247%)
23M23.00 mi1.25 mi6492+1115742+1075742+1075962(Top 21%)4940(Top 31%)4940(Top 207%)
24M24.00 mi1.00 mi6404+885661+815661+815800(Top 20%)4788(Top 30%)4788(Top 201%)
40K24.85 mi0.85 mi6299+1055566+955566+954657(Top 16%)3962(Top 25%)3962(Top 166%)
25.2M25.20 mi0.35 mi6239+605508+585508+584234(Top 15%)3590(Top 22%)3590(Top 150%)
Finish26.22 mi1.02 mi6115+1245399+1095399+1094511(Top 16%)3803(Top 24%)3803(Top 159%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 27%
×21stories
+97ft-345ft

Overall

7587

Males

6669

M45-49

6669

5K→10K

3.1 - 6.2 mi

Top 26%
×5stories
+79ft-138ft

Overall

7424

Males

6581

M45-49

6581

10K→15K

6.2 - 9.3 mi

Top 27%
×3stories
+67ft-78ft

Overall

7587

Males

6669

M45-49

6669

15K→20K

9.3 - 12.4 mi

Top 27%
×5stories
+106ft-86ft

Overall

7623

Males

6624

M45-49

6624

20K→Half

12.4 - 13.1 mi

Top 26%
×2stories
+19ft-37ft

Overall

7407

Males

6497

M45-49

6497

Half→25K

13.1 - 15.5 mi

Top 24%
×4stories
+66ft-88ft

Overall

6913

Males

6052

M45-49

6052

25K→30K

15.5 - 18.6 mi

Top 21%
×9stories
+181ft-148ft

Overall

6097

Males

5377

M45-49

5377

30K→20M

18.6 - 20.0 mi

Top 19%
×5stories
+64ft-50ft

Overall

5478

Males

4828

M45-49

4828

20M→21M

20.0 - 21.0 mi

Top 17%
×8stories
+106ft-24ft

Overall

4853

Males

4263

M45-49

4263

21M→35K

21.0 - 21.8 mi

Top 26%
×7stories
+17ft-86ft

Overall

7360

Males

5894

M45-49

5894

35K→23M

21.8 - 23.0 mi

Top 21%
×5stories
+23ft-63ft

Overall

5962

Males

4940

M45-49

4940

23M→24M

23.0 - 24.0 mi

Top 20%
×6stories
+12ft-82ft

Overall

5800

Males

4788

M45-49

4788

24M→40K

24.0 - 24.9 mi

Top 16%
×1story
+6ft-20ft

Overall

4657

Males

3962

M45-49

3962

40K→25.2M

24.9 - 25.2 mi

Top 15%
×1story
+13ft-16ft

Overall

4234

Males

3590

M45-49

3590

25.2M→Finish

25.2 - 26.2 mi

Top 16%
×2stories
+22ft-21ft

Overall

4511

Males

3803

M45-49

3803

Passing Analysis

Category:
Athletes Passed
2086
Passed By
687
Net Change
+1399
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7514
5K → 10K224171+53#7514#7461
10K → 15K125169-44#7461#7505
15K → 20K1341340#7505#7505
20K → Half3019+11#7505#7494
Half → 25K17840+138#7494#7356
25K → 30K37324+349#7356#7007
30K → 20M22312+211#7007#6796
20M → 21M1797+172#6796#6624
21M → 35K6342+21#6624#6603
35K → 23M13827+111#6603#6492
23M → 24M10214+88#6492#6404
24M → 40K1127+105#6404#6299
40K → 25.2M699+60#6299#6239
25.2M → Finish13612+124#6239#6115
TOTALS2086687+1399
📊

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