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BOSTON MARATHON 2025

Chad Marsh

Bib: 13236•M

WA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 34%
Gender (Male)
#0 / 16105
Top 47%
Masters (Masters Men)
#0 / 10463
Top 35%
Division (M50-54)
#0 / 1996
Top 36%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:32
Rank: #9912
Start → 5K
22:32 | 7:15/mi
10K· 6.21 mi
45:12
Rank: #10106 (-194)
5K → 10K
22:40 | 7:18/mi
15K· 9.32 mi
1:07:46
Rank: #9939 (+167)
10K → 15K
22:34 | 7:16/mi
20K· 12.43 mi
1:30:40
Rank: #9830 (+109)
15K → 20K
22:54 | 7:22/mi
Half· 13.11 mi
1:35:41
Rank: #9862 (-32)
20K → Half
5:01 | 7:21/mi
25K· 15.53 mi
1:53:53
Rank: #9835 (+27)
Half → 25K
18:12 | 7:30/mi
30K· 18.64 mi
2:17:54
Rank: #9686 (+149)
25K → 30K
24:01 | 7:44/mi
20M
2:28:45
Rank: #9691 (-5)
30K → 20M
10:51 | 7:59/mi
21M
2:37:16
Rank: #9718 (-27)
20M → 21M
8:31 | 8:31/mi
35K· 21.75 mi
2:43:08
Rank: #9730 (-12)
21M → 35K
5:52 | 7:51/mi
23M
2:53:12
Rank: #9757 (-27)
35K → 23M
10:04 | 8:02/mi
24M
3:01:00
Rank: #9743 (+14)
23M → 24M
7:48 | 7:48/mi
40K· 24.85 mi
3:07:41
Rank: #9663 (+80)
24M → 40K
6:41 | 7:49/mi
25.2M
3:10:36
Rank: #9629 (+34)
40K → 25.2M
2:55 | 8:27/mi
Finish· 26.22 mi
3:18:18
Rank: #9609 (+20)
25.2M → Finish
7:42 | 7:33/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:35:41
Pace7:18 /mi
2nd Half
Distance13.11 mi
Time1:42:37
Pace7:50 /mi
📊Positive Split: 7.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:5822:327:1522:32
7:15
-
10K
6.21 mi11:15:3845:127:1622:40
7:18
+0:03
15K
9.32 mi11:38:121:07:467:1622:34
7:16
-0:02
20K
12.43 mi12:01:061:30:407:1822:54
7:22
+0:06
Half
13.11 mi12:06:071:35:417:185:01
7:21
-0:01
25K
15.53 mi12:24:191:53:537:2018:12
7:30
+0:09
30K
18.64 mi12:48:202:17:547:2424:01
7:44
+0:14
20M
20.00 mi12:59:112:28:457:2610:51
7:59
+0:15
21M
21.00 mi13:07:422:37:167:298:31
8:31
+0:32
35K
21.75 mi13:13:342:43:087:305:52
7:51
-0:40
23M
23.00 mi13:23:382:53:127:3210:04
8:02
+0:11
24M
24.00 mi13:31:263:01:007:337:48
7:48
-0:14
40K
24.85 mi13:38:073:07:417:336:41
7:49
+0:01
25.2M
25.20 mi13:41:023:10:367:342:55
8:27
+0:38
Finish
26.22 mi13:48:443:18:187:347:42
7:33
-0:54

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

7:15 /mi

Average Pace

7:34 /mi

Slowest Pace

8:31 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:45:57

84% of race

Time at Steady Pace

32:21

16% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:34 /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 mi10:52:5822:327:1522:32
7:15
#9912
10K
6.21 mi11:15:3845:127:1622:40
7:18
#10106
15K
9.32 mi11:38:121:07:467:1622:34
7:16
#9939
20K
12.43 mi12:01:061:30:407:1822:54
7:22
#9830
Half
13.11 mi12:06:071:35:417:185:01
7:21
#9862
25K
15.53 mi12:24:191:53:537:2018:12
7:30
#9835
30K
18.64 mi12:48:202:17:547:2424:01
7:44
#9686
20M
20.00 mi12:59:112:28:457:2610:51
7:59
#9691
21M
21.00 mi13:07:422:37:167:298:31
8:31
#9718
35K
21.75 mi13:13:342:43:087:305:52
7:51
#9730
23M
23.00 mi13:23:382:53:127:3210:04
8:02
#9757
24M
24.00 mi13:31:263:01:007:337:48
7:48
#9743
40K
24.85 mi13:38:073:07:417:336:41
7:49
#9663
25.2M
25.20 mi13:41:023:10:367:342:55
8:27
#9629
Finish
26.22 mi13:48:443:18:187:347:42
7:33
#9609
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi9912812081209670(Top 34%)7905(Top 49%)7905(Top 396%)
10K6.21 mi3.10 mi10106-1948215-958215-9510301(Top 36%)8309(Top 52%)8309(Top 416%)
15K9.32 mi3.11 mi9939+1678097+1188097+1189670(Top 34%)7905(Top 49%)7905(Top 396%)
20K12.43 mi3.11 mi9830+1098018+798018+799637(Top 34%)7809(Top 48%)7809(Top 391%)
Half13.11 mi0.68 mi9862-328030-128030-1210412(Top 37%)8225(Top 51%)8225(Top 412%)
25K15.53 mi2.42 mi9835+277980+507980+509999(Top 35%)7870(Top 49%)7870(Top 394%)
30K18.64 mi3.11 mi9686+1497842+1387842+1389398(Top 33%)7371(Top 46%)7371(Top 369%)
20M20.00 mi1.36 mi9691-57812+307812+3010321(Top 36%)7694(Top 48%)7694(Top 385%)
21M21.00 mi1.00 mi9718-277803+97803+910544(Top 37%)7633(Top 47%)7633(Top 382%)
35K21.75 mi0.75 mi9730-127785+187785+1811082(Top 39%)7893(Top 49%)7893(Top 395%)
23M23.00 mi1.25 mi9757-277746+397746+3910297(Top 36%)7381(Top 46%)7381(Top 370%)
24M24.00 mi1.00 mi9743+147701+457701+459780(Top 34%)7051(Top 44%)7051(Top 353%)
40K24.85 mi0.85 mi9663+807629+727629+728866(Top 31%)6448(Top 40%)6448(Top 323%)
25.2M25.20 mi0.35 mi9629+347589+407589+408523(Top 30%)6208(Top 39%)6208(Top 311%)
Finish26.22 mi1.02 mi9609+207536+537536+539580(Top 34%)6752(Top 42%)6752(Top 338%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 34%
×21stories
+97ft-345ft

Overall

9670

Males

7905

M50-54

7905

5K→10K

3.1 - 6.2 mi

Top 36%
×5stories
+79ft-138ft

Overall

10301

Males

8309

M50-54

8309

10K→15K

6.2 - 9.3 mi

Top 34%
×3stories
+67ft-78ft

Overall

9670

Males

7905

M50-54

7905

15K→20K

9.3 - 12.4 mi

Top 34%
×5stories
+106ft-86ft

Overall

9637

Males

7809

M50-54

7809

20K→Half

12.4 - 13.1 mi

Top 37%
×2stories
+19ft-37ft

Overall

10412

Males

8225

M50-54

8225

Half→25K

13.1 - 15.5 mi

Top 35%
×4stories
+66ft-88ft

Overall

9999

Males

7870

M50-54

7870

25K→30K

15.5 - 18.6 mi

Top 33%
×9stories
+181ft-148ft

Overall

9398

Males

7371

M50-54

7371

30K→20M

18.6 - 20.0 mi

Top 36%
×5stories
+64ft-50ft

Overall

10321

Males

7694

M50-54

7694

20M→21M

20.0 - 21.0 mi

Top 37%
×8stories
+106ft-24ft

Overall

10544

Males

7633

M50-54

7633

21M→35K

21.0 - 21.8 mi

Top 39%
×7stories
+17ft-86ft

Overall

11082

Males

7893

M50-54

7893

35K→23M

21.8 - 23.0 mi

Top 36%
×5stories
+23ft-63ft

Overall

10297

Males

7381

M50-54

7381

23M→24M

23.0 - 24.0 mi

Top 34%
×6stories
+12ft-82ft

Overall

9780

Males

7051

M50-54

7051

24M→40K

24.0 - 24.9 mi

Top 31%
×1story
+6ft-20ft

Overall

8866

Males

6448

M50-54

6448

40K→25.2M

24.9 - 25.2 mi

Top 30%
×1story
+13ft-16ft

Overall

8523

Males

6208

M50-54

6208

25.2M→Finish

25.2 - 26.2 mi

Top 34%
×2stories
+22ft-21ft

Overall

9580

Males

6752

M50-54

6752

Passing Analysis

Category:
Athletes Passed
1827*
Passed By
1521
Net Change
+303
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9912
5K → 10K147339-194#9912#10106
10K → 15K269*102+167#10106#9939
15K → 20K235126+109#9939#9830
20K → Half2254-32#9830#9862
Half → 25K168141+27#9862#9835
25K → 30K297148+149#9835#9686
30K → 20M103107-5#9686#9691
20M → 21M85112-27#9691#9718
21M → 35K6173-12#9718#9730
35K → 23M102129-27#9730#9757
23M → 24M9581+14#9757#9743
24M → 40K10828+80#9743#9663
40K → 25.2M5319+34#9663#9629
25.2M → Finish8262+20#9629#9609
TOTALS1827*1521+303

* 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