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BOSTON MARATHON 2025

David Forsyth

Bib: 3381•M

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0:00
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Overall
#0 / 28404
Top 11%
Gender (Male)
#0 / 16105
Top 19%
Division (M18-39)
#0 / 5642
Top 42%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:15
Rank: #3952
Start → 5K
20:15 | 6:31/mi
10K· 6.21 mi
40:17
Rank: #3651 (+301)
5K → 10K
20:02 | 6:27/mi
15K· 9.32 mi
1:00:07
Rank: #3321 (+330)
10K → 15K
19:50 | 6:23/mi
20K· 12.43 mi
1:20:10
Rank: #3164 (+157)
15K → 20K
20:03 | 6:27/mi
Half· 13.11 mi
1:24:34
Rank: #3173 (-9)
20K → Half
4:24 | 6:27/mi
25K· 15.53 mi
1:40:18
Rank: #3093 (+80)
Half → 25K
15:44 | 6:29/mi
30K· 18.64 mi
2:01:13
Rank: #3061 (+32)
25K → 30K
20:55 | 6:44/mi
20M
2:10:29
Rank: #3013 (+48)
30K → 20M
9:16 | 6:49/mi
21M
2:17:37
Rank: #2974 (+39)
20M → 21M
7:08 | 7:08/mi
35K· 21.75 mi
2:22:41
Rank: #2965 (+9)
21M → 35K
5:04 | 6:46/mi
23M
2:31:23
Rank: #2948 (+17)
35K → 23M
8:42 | 6:57/mi
24M
2:38:23
Rank: #2987 (-39)
23M → 24M
7:00 | 7:00/mi
40K· 24.85 mi
2:44:57
Rank: #3102 (-115)
24M → 40K
6:34 | 7:41/mi
25.2M
2:47:44
Rank: #3130 (-28)
40K → 25.2M
2:47 | 8:04/mi
Finish· 26.22 mi
2:55:04
Rank: #3260 (-130)
25.2M → Finish
7:20 | 7:12/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:24:34
Pace6:27 /mi
2nd Half
Distance13.11 mi
Time1:30:30
Pace6:54 /mi
📊Positive Split: 7.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:21:4020:156:3120:15
6:31
-
10K
6.21 mi10:41:4240:176:2920:02
6:27
-0:04
15K
9.32 mi11:01:321:00:076:2719:50
6:23
-0:04
20K
12.43 mi11:21:351:20:106:2720:03
6:27
+0:04
Half
13.11 mi11:25:591:24:346:274:24
6:27
0:00
25K
15.53 mi11:41:431:40:186:2715:44
6:29
+0:02
30K
18.64 mi12:02:382:01:136:3020:55
6:44
+0:15
20M
20.00 mi12:11:542:10:296:319:16
6:49
+0:05
21M
21.00 mi12:19:022:17:376:337:08
7:08
+0:19
35K
21.75 mi12:24:062:22:416:345:04
6:46
-0:22
23M
23.00 mi12:32:482:31:236:358:42
6:57
+0:11
24M
24.00 mi12:39:482:38:236:367:00
7:00
+0:03
40K
24.85 mi12:46:222:44:576:386:34
7:41
+0:41
25.2M
25.20 mi12:49:092:47:446:392:47
8:04
+0:23
Finish
26.22 mi12:56:292:55:046:417:20
7:12
-0:52

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

6:23 /mi

Average Pace

6:41 /mi

Slowest Pace

8:04 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:40:18

57% of race

Time at Steady Pace

50:57

29% of race

Time at Slower Pace

23:49

14% of race

Average Pace: 6:41 /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 mi10:21:4020:156:3120:15
6:31
#3952
10K
6.21 mi10:41:4240:176:2920:02
6:27
#3651
15K
9.32 mi11:01:321:00:076:2719:50
6:23
#3321
20K
12.43 mi11:21:351:20:106:2720:03
6:27
#3164
Half
13.11 mi11:25:591:24:346:274:24
6:27
#3173
25K
15.53 mi11:41:431:40:186:2715:44
6:29
#3093
30K
18.64 mi12:02:382:01:136:3020:55
6:44
#3061
20M
20.00 mi12:11:542:10:296:319:16
6:49
#3013
21M
21.00 mi12:19:022:17:376:337:08
7:08
#2974
35K
21.75 mi12:24:062:22:416:345:04
6:46
#2965
23M
23.00 mi12:32:482:31:236:358:42
6:57
#2948
24M
24.00 mi12:39:482:38:236:367:00
7:00
#2987
40K
24.85 mi12:46:222:44:576:386:34
7:41
#3102
25.2M
25.20 mi12:49:092:47:446:392:47
8:04
#3130
Finish
26.22 mi12:56:292:55:046:417:20
7:12
#3260
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi3952373937392833(Top 10%)2698(Top 17%)2698(Top 48%)
10K6.21 mi3.10 mi3651+3013462+2773462+2773354(Top 12%)3185(Top 20%)3185(Top 56%)
15K9.32 mi3.11 mi3321+3303154+3083154+3082833(Top 10%)2698(Top 17%)2698(Top 48%)
20K12.43 mi3.11 mi3164+1573013+1413013+1412834(Top 10%)2698(Top 17%)2698(Top 48%)
Half13.11 mi0.68 mi3173-93023-103023-103351(Top 12%)3177(Top 20%)3177(Top 56%)
25K15.53 mi2.42 mi3093+802948+752948+752828(Top 10%)2690(Top 17%)2690(Top 48%)
30K18.64 mi3.11 mi3061+322913+352913+353038(Top 11%)2855(Top 18%)2855(Top 51%)
20M20.00 mi1.36 mi3013+482862+512862+513034(Top 11%)2824(Top 18%)2824(Top 50%)
21M21.00 mi1.00 mi2974+392822+402822+402824(Top 10%)2618(Top 16%)2618(Top 46%)
35K21.75 mi0.75 mi2965+92808+142808+143897(Top 14%)3497(Top 22%)3497(Top 62%)
23M23.00 mi1.25 mi2948+172790+182790+183449(Top 12%)3132(Top 19%)3132(Top 56%)
24M24.00 mi1.00 mi2987-392825-352825-354594(Top 16%)3965(Top 25%)3965(Top 70%)
40K24.85 mi0.85 mi3102-1152927-1022927-1027896(Top 28%)5916(Top 37%)5916(Top 105%)
25.2M25.20 mi0.35 mi3130-282946-192946-196202(Top 22%)4835(Top 30%)4835(Top 86%)
Finish26.22 mi1.02 mi3260-1303056-1103056-1106979(Top 25%)5309(Top 33%)5309(Top 94%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 10%
×21stories
+97ft-345ft

Overall

2833

Males

2698

M18-39

2698

5K→10K

3.1 - 6.2 mi

Top 12%
×5stories
+79ft-138ft

Overall

3354

Males

3185

M18-39

3185

10K→15K

6.2 - 9.3 mi

Top 10%
×3stories
+67ft-78ft

Overall

2833

Males

2698

M18-39

2698

15K→20K

9.3 - 12.4 mi

Top 10%
×5stories
+106ft-86ft

Overall

2834

Males

2698

M18-39

2698

20K→Half

12.4 - 13.1 mi

Top 12%
×2stories
+19ft-37ft

Overall

3351

Males

3177

M18-39

3177

Half→25K

13.1 - 15.5 mi

Top 10%
×4stories
+66ft-88ft

Overall

2828

Males

2690

M18-39

2690

25K→30K

15.5 - 18.6 mi

Top 11%
×9stories
+181ft-148ft

Overall

3038

Males

2855

M18-39

2855

30K→20M

18.6 - 20.0 mi

Top 11%
×5stories
+64ft-50ft

Overall

3034

Males

2824

M18-39

2824

20M→21M

20.0 - 21.0 mi

Top 10%
×8stories
+106ft-24ft

Overall

2824

Males

2618

M18-39

2618

21M→35K

21.0 - 21.8 mi

Top 14%
×7stories
+17ft-86ft

Overall

3897

Males

3497

M18-39

3497

35K→23M

21.8 - 23.0 mi

Top 12%
×5stories
+23ft-63ft

Overall

3449

Males

3132

M18-39

3132

23M→24M

23.0 - 24.0 mi

Top 16%
×6stories
+12ft-82ft

Overall

4594

Males

3965

M18-39

3965

24M→40K

24.0 - 24.9 mi

Top 28%
×1story
+6ft-20ft

Overall

7896

Males

5916

M18-39

5916

40K→25.2M

24.9 - 25.2 mi

Top 22%
×1story
+13ft-16ft

Overall

6202

Males

4835

M18-39

4835

25.2M→Finish

25.2 - 26.2 mi

Top 25%
×2stories
+22ft-21ft

Overall

6979

Males

5309

M18-39

5309

Passing Analysis

Category:
Athletes Passed
1423
Passed By
731
Net Change
+692
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3952
5K → 10K33938+301#3952#3651
10K → 15K3399+330#3651#3321
15K → 20K17619+157#3321#3164
20K → Half1423-9#3164#3173
Half → 25K10525+80#3173#3093
25K → 30K132100+32#3093#3061
30K → 20M7729+48#3061#3013
20M → 21M6223+39#3013#2974
21M → 35K3930+9#2974#2965
35K → 23M6447+17#2965#2948
23M → 24M2766-39#2948#2987
24M → 40K17132-115#2987#3102
40K → 25.2M1543-28#3102#3130
25.2M → Finish17147-130#3130#3260
TOTALS1423731+692
📊

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