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BOSTON MARATHON 2025

Aj Merrill

Bib: 2636•M

MD

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 18%
Gender (Male)
#0 / 16105
Top 29%
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
19:33
Rank: #2402
Start → 5K
6:18/mi
19:33 split
10K· 6.21 mi
39:16
Rank: #2550 (-148)
5K → 10K
6:21/mi
19:43 split
15K· 9.32 mi
59:14
Rank: #2708 (-158)
10K → 15K
6:26/mi
19:58 split
20K· 12.43 mi
1:20:19
Rank: #3243 (-535)
15K → 20K
6:47/mi
21:05 split
Half· 13.11 mi
1:24:58
Rank: #3385 (-142)
20K → Half
6:49/mi
4:39 split
25K· 15.53 mi
1:42:22
Rank: #3928 (-543)
Half → 25K
7:11/mi
17:24 split
30K· 18.64 mi
2:05:02
Rank: #4371 (-443)
25K → 30K
7:18/mi
22:40 split
20M
2:15:10
Rank: #4583 (-212)
30K → 20M
7:27/mi
10:08 split
21M
2:23:01
Rank: #4691 (-108)
20M → 21M
7:51/mi
7:51 split
35K· 21.75 mi
2:28:24
Rank: #4741 (-50)
21M → 35K
7:12/mi
5:23 split
23M
2:37:54
Rank: #4921 (-180)
35K → 23M
7:35/mi
9:30 split
24M
2:45:31
Rank: #5092 (-171)
23M → 24M
7:37/mi
7:37 split
40K· 24.85 mi
2:51:58
Rank: #5131 (-39)
24M → 40K
7:33/mi
6:27 split
25.2M
2:54:45
Rank: #5122 (+9)
40K → 25.2M
8:04/mi
2:47 split
Finish· 26.22 mi
3:02:21
Rank: #5186 (-64)
25.2M → Finish
7:27/mi
7:36 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:24:58
Pace6:29 /mi
2nd Half
Distance13.11 mi
Time1:37:23
Pace7:26 /mi
📊Positive Split: 14.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:20:3119:336:1819:33
6:18
-
10K
6.21 mi10:40:1439:166:1919:43
6:21
+0:03
15K
9.32 mi11:00:1259:146:2119:58
6:26
+0:05
20K
12.43 mi11:21:171:20:196:2821:05
6:47
+0:21
Half
13.11 mi11:25:561:24:586:294:39
6:49
+0:02
25K
15.53 mi11:43:201:42:226:3517:24
7:11
+0:22
30K
18.64 mi12:06:002:05:026:4222:40
7:18
+0:07
20M
20.00 mi12:16:082:15:106:4510:08
7:27
+0:09
21M
21.00 mi12:23:592:23:016:497:51
7:51
+0:24
35K
21.75 mi12:29:222:28:246:495:23
7:12
-0:39
23M
23.00 mi12:38:522:37:546:529:30
7:35
+0:23
24M
24.00 mi12:46:292:45:316:547:37
7:37
+0:02
40K
24.85 mi12:52:562:51:586:556:27
7:33
-0:04
25.2M
25.20 mi12:55:432:54:456:562:47
8:04
+0:31
Finish
26.22 mi13:03:193:02:216:587:36
7:27
-0:37

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

6:18 /mi

Average Pace

6:58 /mi

Slowest Pace

8:04 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:24:58

47% of race

Time at Steady Pace

1:09:38

38% of race

Time at Slower Pace

27:45

15% of race

Average Pace: 6:57 /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 mi10:20:3119:336:1819:33
6:18
#2402
10K
6.21 mi10:40:1439:166:1919:43
6:21
#2550
15K
9.32 mi11:00:1259:146:2119:58
6:26
#2708
20K
12.43 mi11:21:171:20:196:2821:05
6:47
#3243
Half
13.11 mi11:25:561:24:586:294:39
6:49
#3385
25K
15.53 mi11:43:201:42:226:3517:24
7:11
#3928
30K
18.64 mi12:06:002:05:026:4222:40
7:18
#4371
20M
20.00 mi12:16:082:15:106:4510:08
7:27
#4583
21M
21.00 mi12:23:592:23:016:497:51
7:51
#4691
35K
21.75 mi12:29:222:28:246:495:23
7:12
#4741
23M
23.00 mi12:38:522:37:546:529:30
7:35
#4921
24M
24.00 mi12:46:292:45:316:547:37
7:37
#5092
40K
24.85 mi12:52:562:51:586:556:27
7:33
#5131
25.2M
25.20 mi12:55:432:54:456:562:47
8:04
#5122
Finish
26.22 mi13:03:193:02:216:587:36
7:27
#5186
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2402228822883100(Top 11%)2952(Top 18%)2952(Top 52%)
10K6.21 mi3.10 mi2550-1482429-1412429-1412718(Top 10%)2589(Top 16%)2589(Top 46%)
15K9.32 mi3.11 mi2708-1582581-1522581-1523100(Top 11%)2952(Top 18%)2952(Top 52%)
20K12.43 mi3.11 mi3243-5353088-5073088-5075154(Top 18%)4749(Top 29%)4749(Top 84%)
Half13.11 mi0.68 mi3385-1423215-1273215-1276212(Top 22%)5597(Top 35%)5597(Top 99%)
25K15.53 mi2.42 mi3928-5433702-4873702-4877413(Top 26%)6384(Top 40%)6384(Top 113%)
30K18.64 mi3.11 mi4371-4434089-3874089-3876412(Top 23%)5591(Top 35%)5591(Top 99%)
20M20.00 mi1.36 mi4583-2124252-1634252-1636694(Top 24%)5635(Top 35%)5635(Top 100%)
21M21.00 mi1.00 mi4691-1084345-934345-936449(Top 23%)5344(Top 33%)5344(Top 95%)
35K21.75 mi0.75 mi4741-504374-294374-296518(Top 23%)5384(Top 33%)5384(Top 95%)
23M23.00 mi1.25 mi4921-1804516-1424516-1427130(Top 25%)5645(Top 35%)5645(Top 100%)
24M24.00 mi1.00 mi5092-1714646-1304646-1308477(Top 30%)6353(Top 39%)6353(Top 113%)
40K24.85 mi0.85 mi5131-394668-224668-227004(Top 25%)5422(Top 34%)5422(Top 96%)
25.2M25.20 mi0.35 mi5122+94659+94659+96226(Top 22%)4859(Top 30%)4859(Top 86%)
Finish26.22 mi1.02 mi5186-644702-434702-438845(Top 31%)6345(Top 39%)6345(Top 112%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 11%
×21story building
+97ft-345ft

Overall

3100

Males

2952

M18-39

2952

5K→10K

3.1 - 6.2 mi

Top 10%
×5story building
+79ft-138ft

Overall

2718

Males

2589

M18-39

2589

10K→15K

6.2 - 9.3 mi

Top 11%
×3story building
+67ft-78ft

Overall

3100

Males

2952

M18-39

2952

15K→20K

9.3 - 12.4 mi

Top 18%
×5story building
+106ft-86ft

Overall

5154

Males

4749

M18-39

4749

20K→Half

12.4 - 13.1 mi

Top 22%
×2story building
+19ft-37ft

Overall

6212

Males

5597

M18-39

5597

Half→25K

13.1 - 15.5 mi

Top 26%
×4story building
+66ft-88ft

Overall

7413

Males

6384

M18-39

6384

25K→30K

15.5 - 18.6 mi

Top 23%
×9story building
+181ft-148ft

Overall

6412

Males

5591

M18-39

5591

30K→20M

18.6 - 20.0 mi

Top 24%
×5story building
+64ft-50ft

Overall

6694

Males

5635

M18-39

5635

20M→21M

20.0 - 21.0 mi

Top 23%
×8story building
+106ft-24ft

Overall

6449

Males

5344

M18-39

5344

21M→35K

21.0 - 21.8 mi

Top 23%
×7story building
+17ft-86ft

Overall

6518

Males

5384

M18-39

5384

35K→23M

21.8 - 23.0 mi

Top 25%
×5story building
+23ft-63ft

Overall

7130

Males

5645

M18-39

5645

23M→24M

23.0 - 24.0 mi

Top 30%
×6story building
+12ft-82ft

Overall

8477

Males

6353

M18-39

6353

24M→40K

24.0 - 24.9 mi

Top 25%
×1story
+6ft-20ft

Overall

7004

Males

5422

M18-39

5422

40K→25.2M

24.9 - 25.2 mi

Top 22%
×1story
+13ft-16ft

Overall

6226

Males

4859

M18-39

4859

25.2M→Finish

25.2 - 26.2 mi

Top 31%
×2story building
+22ft-21ft

Overall

8845

Males

6345

M18-39

6345

Passing Analysis

Category:
Athletes Passed
433
Passed By
3217
Net Change
-2784
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2402
5K → 10K55203-148#2402#2550
10K → 15K44202-158#2550#2708
15K → 20K8543-535#2708#3243
20K → Half1143-142#3243#3385
Half → 25K12555-543#3385#3928
25K → 30K51494-443#3928#4371
30K → 20M26238-212#4371#4583
20M → 21M44152-108#4583#4691
21M → 35K3787-50#4691#4741
35K → 23M43223-180#4741#4921
23M → 24M22193-171#4921#5092
24M → 40K4079-39#5092#5131
40K → 25.2M2516+9#5131#5122
25.2M → Finish2589-64#5122#5186
TOTALS4333217-2784
📊

Passing Visuals

Category:
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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