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BOSTON MARATHON 2025

Brian Diffenderfer

Bib: 22209•M

MD

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M60-64)
#0 / 1259
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:03
Rank: #21044
Start → 5K
27:03 | 8:42/mi
10K· 6.21 mi
55:05
Rank: #21774 (-730)
5K → 10K
28:02 | 9:01/mi
15K· 9.32 mi
1:23:20
Rank: #22026 (-252)
10K → 15K
28:15 | 9:06/mi
20K· 12.43 mi
1:51:25
Rank: #21778 (+248)
15K → 20K
28:05 | 9:02/mi
Half· 13.11 mi
1:57:31
Rank: #21760 (+18)
20K → Half
6:06 | 8:56/mi
25K· 15.53 mi
2:19:26
Rank: #21454 (+306)
Half → 25K
21:55 | 9:02/mi
30K· 18.64 mi
2:48:32
Rank: #21064 (+390)
25K → 30K
29:06 | 9:22/mi
20M
3:01:08
Rank: #20823 (+241)
30K → 20M
12:36 | 9:16/mi
21M
3:11:02
Rank: #20632 (+191)
20M → 21M
9:54 | 9:54/mi
35K· 21.75 mi
3:18:09
Rank: #20615 (+17)
21M → 35K
7:07 | 9:31/mi
23M
3:30:26
Rank: #20590 (+25)
35K → 23M
12:17 | 9:49/mi
24M
3:40:48
Rank: #20731 (-141)
23M → 24M
10:22 | 10:22/mi
40K· 24.85 mi
3:49:37
Rank: #20767 (-36)
24M → 40K
8:49 | 10:19/mi
25.2M
3:53:30
Rank: #20783 (-16)
40K → 25.2M
3:53 | 11:16/mi
Finish· 26.22 mi
4:04:24
Rank: #20953 (-170)
25.2M → Finish
10:54 | 10:42/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:57:31
Pace8:58 /mi
2nd Half
Distance13.11 mi
Time2:06:53
Pace9:41 /mi
📊Positive Split: 8.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:22:1227:038:4227:03
8:42
-
10K
6.21 mi11:50:1455:058:5228:02
9:01
+0:19
15K
9.32 mi12:18:291:23:208:5628:15
9:06
+0:05
20K
12.43 mi12:46:341:51:258:5828:05
9:02
-0:04
Half
13.11 mi12:52:401:57:318:586:06
8:56
-0:06
25K
15.53 mi13:14:352:19:268:5921:55
9:02
+0:06
30K
18.64 mi13:43:412:48:329:0229:06
9:22
+0:20
20M
20.00 mi13:56:173:01:089:0312:36
9:16
-0:06
21M
21.00 mi14:06:113:11:029:069:54
9:54
+0:38
35K
21.75 mi14:13:183:18:099:077:07
9:31
-0:23
23M
23.00 mi14:25:353:30:269:0912:17
9:49
+0:18
24M
24.00 mi14:35:573:40:489:1210:22
10:22
+0:33
40K
24.85 mi14:44:463:49:379:148:49
10:19
-0:03
25.2M
25.20 mi14:48:393:53:309:163:53
11:16
+0:57
Finish
26.22 mi14:59:334:04:249:2010:54
10:42
-0:34

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

8:42 /mi

Average Pace

9:20 /mi

Slowest Pace

11:16 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

33:09

14% of race

Time at Steady Pace

2:35:06

63% of race

Time at Slower Pace

56:09

23% of race

Average Pace: 9:19 /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 mi11:22:1227:038:4227:03
8:42
#21044
10K
6.21 mi11:50:1455:058:5228:02
9:01
#21774
15K
9.32 mi12:18:291:23:208:5628:15
9:06
#22026
20K
12.43 mi12:46:341:51:258:5828:05
9:02
#21778
Half
13.11 mi12:52:401:57:318:586:06
8:56
#21760
25K
15.53 mi13:14:352:19:268:5921:55
9:02
#21454
30K
18.64 mi13:43:412:48:329:0229:06
9:22
#21064
20M
20.00 mi13:56:173:01:089:0312:36
9:16
#20823
21M
21.00 mi14:06:113:11:029:069:54
9:54
#20632
35K
21.75 mi14:13:183:18:099:077:07
9:31
#20615
23M
23.00 mi14:25:353:30:269:0912:17
9:49
#20590
24M
24.00 mi14:35:573:40:489:1210:22
10:22
#20731
40K
24.85 mi14:44:463:49:379:148:49
10:19
#20767
25.2M
25.20 mi14:48:393:53:309:163:53
11:16
#20783
Finish
26.22 mi14:59:334:04:249:2010:54
10:42
#20953
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi21044128791287922422(Top 79%)13574(Top 84%)13574(Top 1078%)
10K6.21 mi3.10 mi21774-73013227-34813227-34822473(Top 79%)13563(Top 84%)13563(Top 1077%)
15K9.32 mi3.11 mi22026-25213350-12313350-12322422(Top 79%)13574(Top 84%)13574(Top 1078%)
20K12.43 mi3.11 mi21778+24813237+11313237+11321164(Top 75%)12967(Top 81%)12967(Top 1030%)
Half13.11 mi0.68 mi21760+1813227+1013227+1021542(Top 76%)13146(Top 82%)13146(Top 1044%)
25K15.53 mi2.42 mi21454+30613098+12913098+12920080(Top 71%)12452(Top 77%)12452(Top 989%)
30K18.64 mi3.11 mi21064+39012884+21412884+21419408(Top 68%)12018(Top 75%)12018(Top 955%)
20M20.00 mi1.36 mi20823+24112760+12412760+12418157(Top 64%)11312(Top 70%)11312(Top 898%)
21M21.00 mi1.00 mi20632+19112653+10712653+10717900(Top 63%)11121(Top 69%)11121(Top 883%)
35K21.75 mi0.75 mi20615+1712630+2312630+2320371(Top 72%)12148(Top 75%)12148(Top 965%)
23M23.00 mi1.25 mi20590+2512598+3212598+3219821(Top 70%)11821(Top 73%)11821(Top 939%)
24M24.00 mi1.00 mi20731-14112647-4912647-4922436(Top 79%)13018(Top 81%)13018(Top 1034%)
40K24.85 mi0.85 mi20767-3612643+412643+421398(Top 75%)12470(Top 77%)12470(Top 990%)
25.2M25.20 mi0.35 mi20783-1612637+612637+621390(Top 75%)12479(Top 77%)12479(Top 991%)
Finish26.22 mi1.02 mi20953-17012696-5912696-5924717(Top 87%)14132(Top 88%)14132(Top 1122%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 79%
×21stories
+97ft-345ft

Overall

22422

Males

13574

M60-64

13574

5K→10K

3.1 - 6.2 mi

Top 79%
×5stories
+79ft-138ft

Overall

22473

Males

13563

M60-64

13563

10K→15K

6.2 - 9.3 mi

Top 79%
×3stories
+67ft-78ft

Overall

22422

Males

13574

M60-64

13574

15K→20K

9.3 - 12.4 mi

Top 75%
×5stories
+106ft-86ft

Overall

21164

Males

12967

M60-64

12967

20K→Half

12.4 - 13.1 mi

Top 76%
×2stories
+19ft-37ft

Overall

21542

Males

13146

M60-64

13146

Half→25K

13.1 - 15.5 mi

Top 71%
×4stories
+66ft-88ft

Overall

20080

Males

12452

M60-64

12452

25K→30K

15.5 - 18.6 mi

Top 68%
×9stories
+181ft-148ft

Overall

19408

Males

12018

M60-64

12018

30K→20M

18.6 - 20.0 mi

Top 64%
×5stories
+64ft-50ft

Overall

18157

Males

11312

M60-64

11312

20M→21M

20.0 - 21.0 mi

Top 63%
×8stories
+106ft-24ft

Overall

17900

Males

11121

M60-64

11121

21M→35K

21.0 - 21.8 mi

Top 72%
×7stories
+17ft-86ft

Overall

20371

Males

12148

M60-64

12148

35K→23M

21.8 - 23.0 mi

Top 70%
×5stories
+23ft-63ft

Overall

19821

Males

11821

M60-64

11821

23M→24M

23.0 - 24.0 mi

Top 79%
×6stories
+12ft-82ft

Overall

22436

Males

13018

M60-64

13018

24M→40K

24.0 - 24.9 mi

Top 75%
×1story
+6ft-20ft

Overall

21398

Males

12470

M60-64

12470

40K→25.2M

24.9 - 25.2 mi

Top 75%
×1story
+13ft-16ft

Overall

21390

Males

12479

M60-64

12479

25.2M→Finish

25.2 - 26.2 mi

Top 87%
×2stories
+22ft-21ft

Overall

24717

Males

14132

M60-64

14132

Passing Analysis

Category:
Athletes Passed
2006
Passed By
1915
Net Change
+91
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21044
5K → 10K76806-730#21044#21774
10K → 15K122374-252#21774#22026
15K → 20K31062+248#22026#21778
20K → Half4325+18#21778#21760
Half → 25K32317+306#21760#21454
25K → 30K42333+390#21454#21064
30K → 20M2498+241#21064#20823
20M → 21M20615+191#20823#20632
21M → 35K5235+17#20632#20615
35K → 23M10176+25#20615#20590
23M → 24M21162-141#20590#20731
24M → 40K4480-36#20731#20767
40K → 25.2M2642-16#20767#20783
25.2M → Finish10180-170#20783#20953
TOTALS20061915+91
📊

Passing Visuals

Category:
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🔥Passing Intensity

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing