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BOSTON MARATHON 2025

Josh Grundy

Bib: 4524•M

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Overall
#0 / 28404
Top 35%
Gender (Male)
#0 / 16105
Top 48%
Division (M18-39)
#0 / 5642
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:54
Rank: #11042
Start → 5K
22:54 | 7:22/mi
10K· 6.21 mi
45:51
Rank: #11032 (+10)
5K → 10K
22:57 | 7:23/mi
15K· 9.32 mi
1:08:45
Rank: #10846 (+186)
10K → 15K
22:54 | 7:22/mi
20K· 12.43 mi
1:31:28
Rank: #10392 (+454)
15K → 20K
22:43 | 7:19/mi
Half· 13.11 mi
1:36:30
Rank: #10395 (-3)
20K → Half
5:02 | 7:23/mi
25K· 15.53 mi
1:54:26
Rank: #10148 (+247)
Half → 25K
17:56 | 7:24/mi
30K· 18.64 mi
2:19:01
Rank: #10220 (-72)
25K → 30K
24:35 | 7:55/mi
20M
2:29:17
Rank: #9903 (+317)
30K → 20M
10:16 | 7:33/mi
21M
2:37:51
Rank: #9953 (-50)
20M → 21M
8:34 | 8:34/mi
35K· 21.75 mi
2:43:25
Rank: #9861 (+92)
21M → 35K
5:34 | 7:26/mi
23M
2:53:26
Rank: #9853 (+8)
35K → 23M
10:01 | 8:00/mi
24M
3:00:59
Rank: #9735 (+118)
23M → 24M
7:33 | 7:33/mi
40K· 24.85 mi
3:07:55
Rank: #9750 (-15)
24M → 40K
6:56 | 8:07/mi
25.2M
3:11:08
Rank: #9807 (-57)
40K → 25.2M
3:13 | 9:20/mi
Finish· 26.22 mi
3:18:59
Rank: #9814 (-7)
25.2M → Finish
7:51 | 7:42/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:36:30
Pace7:22 /mi
2nd Half
Distance13.11 mi
Time1:42:29
Pace7:49 /mi
📊Positive Split: 6.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:0722:547:2222:54
7:22
-
10K
6.21 mi11:15:0445:517:2322:57
7:23
+0:01
15K
9.32 mi11:37:581:08:457:2322:54
7:22
-0:01
20K
12.43 mi12:00:411:31:287:2222:43
7:19
-0:03
Half
13.11 mi12:05:431:36:307:225:02
7:23
+0:04
25K
15.53 mi12:23:391:54:267:2217:56
7:24
+0:01
30K
18.64 mi12:48:142:19:017:2724:35
7:55
+0:31
20M
20.00 mi12:58:302:29:177:2810:16
7:33
-0:22
21M
21.00 mi13:07:042:37:517:318:34
8:34
+1:01
35K
21.75 mi13:12:382:43:257:315:34
7:26
-1:08
23M
23.00 mi13:22:392:53:267:3210:01
8:00
+0:34
24M
24.00 mi13:30:123:00:597:327:33
7:33
-0:27
40K
24.85 mi13:37:083:07:557:346:56
8:07
+0:34
25.2M
25.20 mi13:40:213:11:087:353:13
9:20
+1:13
Finish
26.22 mi13:48:123:18:597:367:51
7:42
-1:38

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

7:19 /mi

Average Pace

7:36 /mi

Slowest Pace

9:20 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

2:25:40

73% of race

Time at Slower Pace

53:19

27% of race

Average Pace: 7:35 /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 mi10:52:0722:547:2222:54
7:22
#11042
10K
6.21 mi11:15:0445:517:2322:57
7:23
#11032
15K
9.32 mi11:37:581:08:457:2322:54
7:22
#10846
20K
12.43 mi12:00:411:31:287:2222:43
7:19
#10392
Half
13.11 mi12:05:431:36:307:225:02
7:23
#10395
25K
15.53 mi12:23:391:54:267:2217:56
7:24
#10148
30K
18.64 mi12:48:142:19:017:2724:35
7:55
#10220
20M
20.00 mi12:58:302:29:177:2810:16
7:33
#9903
21M
21.00 mi13:07:042:37:517:318:34
8:34
#9953
35K
21.75 mi13:12:382:43:257:315:34
7:26
#9861
23M
23.00 mi13:22:392:53:267:3210:01
8:00
#9853
24M
24.00 mi13:30:123:00:597:327:33
7:33
#9735
40K
24.85 mi13:37:083:07:557:346:56
8:07
#9750
25.2M
25.20 mi13:40:213:11:087:353:13
9:20
#9807
Finish
26.22 mi13:48:123:18:597:367:51
7:42
#9814
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi110428710871010586(Top 37%)8389(Top 52%)8389(Top 149%)
10K6.21 mi3.10 mi11032+108687+238687+2311058(Top 39%)8692(Top 54%)8692(Top 154%)
15K9.32 mi3.11 mi10846+1868568+1198568+11910586(Top 37%)8389(Top 52%)8389(Top 149%)
20K12.43 mi3.11 mi10392+4548313+2558313+2559133(Top 32%)7526(Top 47%)7526(Top 133%)
Half13.11 mi0.68 mi10395-38308+58308+510623(Top 37%)8345(Top 52%)8345(Top 148%)
25K15.53 mi2.42 mi10148+2478141+1678141+1679118(Top 32%)7410(Top 46%)7410(Top 131%)
30K18.64 mi3.11 mi10220-728128+138128+1310728(Top 38%)8041(Top 50%)8041(Top 143%)
20M20.00 mi1.36 mi9903+3177936+1927936+1927401(Top 26%)6083(Top 38%)6083(Top 108%)
21M21.00 mi1.00 mi9953-507922+147922+1410865(Top 38%)7804(Top 48%)7804(Top 138%)
35K21.75 mi0.75 mi9861+927846+767846+768204(Top 29%)6427(Top 40%)6427(Top 114%)
23M23.00 mi1.25 mi9853+87789+577789+5710005(Top 35%)7234(Top 45%)7234(Top 128%)
24M24.00 mi1.00 mi9735+1187697+927697+928049(Top 28%)6144(Top 38%)6144(Top 109%)
40K24.85 mi0.85 mi9750-157674+237674+2310898(Top 38%)7508(Top 47%)7508(Top 133%)
25.2M25.20 mi0.35 mi9807-577678-47678-413514(Top 48%)8684(Top 54%)8684(Top 154%)
Finish26.22 mi1.02 mi9814-77651+277651+2710698(Top 38%)7353(Top 46%)7353(Top 130%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 37%
×21stories
+97ft-345ft

Overall

10586

Males

8389

M18-39

8389

5K→10K

3.1 - 6.2 mi

Top 39%
×5stories
+79ft-138ft

Overall

11058

Males

8692

M18-39

8692

10K→15K

6.2 - 9.3 mi

Top 37%
×3stories
+67ft-78ft

Overall

10586

Males

8389

M18-39

8389

15K→20K

9.3 - 12.4 mi

Top 32%
×5stories
+106ft-86ft

Overall

9133

Males

7526

M18-39

7526

20K→Half

12.4 - 13.1 mi

Top 37%
×2stories
+19ft-37ft

Overall

10623

Males

8345

M18-39

8345

Half→25K

13.1 - 15.5 mi

Top 32%
×4stories
+66ft-88ft

Overall

9118

Males

7410

M18-39

7410

25K→30K

15.5 - 18.6 mi

Top 38%
×9stories
+181ft-148ft

Overall

10728

Males

8041

M18-39

8041

30K→20M

18.6 - 20.0 mi

Top 26%
×5stories
+64ft-50ft

Overall

7401

Males

6083

M18-39

6083

20M→21M

20.0 - 21.0 mi

Top 38%
×8stories
+106ft-24ft

Overall

10865

Males

7804

M18-39

7804

21M→35K

21.0 - 21.8 mi

Top 29%
×7stories
+17ft-86ft

Overall

8204

Males

6427

M18-39

6427

35K→23M

21.8 - 23.0 mi

Top 35%
×5stories
+23ft-63ft

Overall

10005

Males

7234

M18-39

7234

23M→24M

23.0 - 24.0 mi

Top 28%
×6stories
+12ft-82ft

Overall

8049

Males

6144

M18-39

6144

24M→40K

24.0 - 24.9 mi

Top 38%
×1story
+6ft-20ft

Overall

10898

Males

7508

M18-39

7508

40K→25.2M

24.9 - 25.2 mi

Top 48%
×1story
+13ft-16ft

Overall

13514

Males

8684

M18-39

8684

25.2M→Finish

25.2 - 26.2 mi

Top 38%
×2stories
+22ft-21ft

Overall

10698

Males

7353

M18-39

7353

Passing Analysis

Category:
Athletes Passed
2473*
Passed By
1243
Net Change
+1228
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11042
5K → 10K263253+10#11042#11032
10K → 15K26882+186#11032#10846
15K → 20K47420+454#10846#10392
20K → Half3437-3#10392#10395
Half → 25K28841+247#10395#10148
25K → 30K216287-72#10148#10220
30K → 20M322*5+317#10220#9903
20M → 21M85134-50#9903#9953
21M → 35K11422+92#9953#9861
35K → 23M109101+8#9861#9853
23M → 24M14426+118#9853#9735
24M → 40K6378-15#9735#9750
40K → 25.2M2481-57#9750#9807
25.2M → Finish6976-7#9807#9814
TOTALS2473*1243+1228

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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