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BOSTON MARATHON 2025

Declan Black

Bib: 4592•M

IL

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 40%
Gender (Male)
#0 / 16105
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
21:17
Rank: #6713
Start → 5K
21:17 | 6:51/mi
10K· 6.21 mi
42:23
Rank: #6505 (+208)
5K → 10K
21:06 | 6:47/mi
15K· 9.32 mi
1:03:21
Rank: #6178 (+327)
10K → 15K
20:58 | 6:45/mi
20K· 12.43 mi
1:24:30
Rank: #5943 (+235)
15K → 20K
21:09 | 6:48/mi
Half· 13.11 mi
1:29:07
Rank: #5935 (+8)
20K → Half
4:37 | 6:46/mi
25K· 15.53 mi
1:46:16
Rank: #6084 (-149)
Half → 25K
17:09 | 7:04/mi
30K· 18.64 mi
2:11:26
Rank: #7005 (-921)
25K → 30K
25:10 | 8:06/mi
20M
2:23:32
Rank: #7579 (-574)
30K → 20M
12:06 | 8:54/mi
21M
2:34:27
Rank: #8589 (-1010)
20M → 21M
10:55 | 10:55/mi
35K· 21.75 mi
2:42:22
Rank: #9455 (-866)
21M → 35K
7:55 | 10:35/mi
23M
2:54:23
Rank: #10207 (-752)
35K → 23M
12:01 | 9:36/mi
24M
3:02:53
Rank: #10402 (-195)
23M → 24M
8:30 | 8:30/mi
40K· 24.85 mi
3:10:18
Rank: #10536 (-134)
24M → 40K
7:25 | 8:40/mi
25.2M
3:14:17
Rank: #10812 (-276)
40K → 25.2M
3:59 | 11:33/mi
Finish· 26.22 mi
3:23:45
Rank: #11254 (-442)
25.2M → Finish
9:28 | 9:17/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:29:07
Pace6:48 /mi
2nd Half
Distance13.11 mi
Time1:54:38
Pace8:45 /mi
📊Positive Split: 28.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:25:4621:176:5121:17
6:51
-
10K
6.21 mi10:46:5242:236:4921:06
6:47
-0:04
15K
9.32 mi11:07:501:03:216:4820:58
6:45
-0:02
20K
12.43 mi11:28:591:24:306:4821:09
6:48
+0:03
Half
13.11 mi11:33:361:29:076:484:37
6:46
-0:02
25K
15.53 mi11:50:451:46:166:5017:09
7:04
+0:18
30K
18.64 mi12:15:552:11:267:0325:10
8:06
+1:02
20M
20.00 mi12:28:012:23:327:1112:06
8:54
+0:48
21M
21.00 mi12:38:562:34:277:2110:55
10:55
+2:01
35K
21.75 mi12:46:512:42:227:287:55
10:35
-0:20
23M
23.00 mi12:58:522:54:237:3512:01
9:36
-0:59
24M
24.00 mi13:07:223:02:537:378:30
8:30
-1:06
40K
24.85 mi13:14:473:10:187:397:25
8:40
+0:10
25.2M
25.20 mi13:18:463:14:177:433:59
11:33
+2:53
Finish
26.22 mi13:28:143:23:457:479:28
9:17
-2:16

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

6:45 /mi

Average Pace

7:47 /mi

Slowest Pace

11:33 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:46:16

52% of race

Time at Steady Pace

1:02:39

31% of race

Time at Slower Pace

34:50

17% of race

Average Pace: 7:46 /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 mi10:25:4621:176:5121:17
6:51
#6713
10K
6.21 mi10:46:5242:236:4921:06
6:47
#6505
15K
9.32 mi11:07:501:03:216:4820:58
6:45
#6178
20K
12.43 mi11:28:591:24:306:4821:09
6:48
#5943
Half
13.11 mi11:33:361:29:076:484:37
6:46
#5935
25K
15.53 mi11:50:451:46:166:5017:09
7:04
#6084
30K
18.64 mi12:15:552:11:267:0325:10
8:06
#7005
20M
20.00 mi12:28:012:23:327:1112:06
8:54
#7579
21M
21.00 mi12:38:562:34:277:2110:55
10:55
#8589
35K
21.75 mi12:46:512:42:227:287:55
10:35
#9455
23M
23.00 mi12:58:522:54:237:3512:01
9:36
#10207
24M
24.00 mi13:07:223:02:537:378:30
8:30
#10402
40K
24.85 mi13:14:473:10:187:397:25
8:40
#10536
25.2M
25.20 mi13:18:463:14:177:433:59
11:33
#10812
Finish
26.22 mi13:28:143:23:457:479:28
9:17
#11254
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi6713608860885590(Top 20%)5122(Top 32%)5122(Top 91%)
10K6.21 mi3.10 mi6505+2085920+1685920+1686318(Top 22%)5741(Top 36%)5741(Top 102%)
15K9.32 mi3.11 mi6178+3275652+2685652+2685590(Top 20%)5122(Top 32%)5122(Top 91%)
20K12.43 mi3.11 mi5943+2355438+2145438+2145385(Top 19%)4941(Top 31%)4941(Top 88%)
Half13.11 mi0.68 mi5935+85434+45434+45895(Top 21%)5382(Top 33%)5382(Top 95%)
25K15.53 mi2.42 mi6084-1495527-935527-936815(Top 24%)5992(Top 37%)5992(Top 106%)
30K18.64 mi3.11 mi7005-9216214-6876214-68712090(Top 43%)8725(Top 54%)8725(Top 155%)
20M20.00 mi1.36 mi7579-5746574-3606574-36016227(Top 57%)10444(Top 65%)10444(Top 185%)
21M21.00 mi1.00 mi8589-10107164-5907164-59021152(Top 74%)12567(Top 78%)12567(Top 223%)
35K21.75 mi0.75 mi9455-8667638-4747638-47423318(Top 82%)13538(Top 84%)13538(Top 240%)
23M23.00 mi1.25 mi10207-7527964-3267964-32619058(Top 67%)11464(Top 71%)11464(Top 203%)
24M24.00 mi1.00 mi10402-1958041-778041-7714469(Top 51%)9354(Top 58%)9354(Top 166%)
40K24.85 mi0.85 mi10536-1348078-378078-3714432(Top 51%)9181(Top 57%)9181(Top 163%)
25.2M25.20 mi0.35 mi10812-2768180-1028180-10222133(Top 78%)12838(Top 80%)12838(Top 228%)
Finish26.22 mi1.02 mi11254-4428340-1608340-16020312(Top 72%)11955(Top 74%)11955(Top 212%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 20%
×21stories
+97ft-345ft

Overall

5590

Males

5122

M18-39

5122

5K→10K

3.1 - 6.2 mi

Top 22%
×5stories
+79ft-138ft

Overall

6318

Males

5741

M18-39

5741

10K→15K

6.2 - 9.3 mi

Top 20%
×3stories
+67ft-78ft

Overall

5590

Males

5122

M18-39

5122

15K→20K

9.3 - 12.4 mi

Top 19%
×5stories
+106ft-86ft

Overall

5385

Males

4941

M18-39

4941

20K→Half

12.4 - 13.1 mi

Top 21%
×2stories
+19ft-37ft

Overall

5895

Males

5382

M18-39

5382

Half→25K

13.1 - 15.5 mi

Top 24%
×4stories
+66ft-88ft

Overall

6815

Males

5992

M18-39

5992

25K→30K

15.5 - 18.6 mi

Top 43%
×9stories
+181ft-148ft

Overall

12090

Males

8725

M18-39

8725

30K→20M

18.6 - 20.0 mi

Top 57%
×5stories
+64ft-50ft

Overall

16227

Males

10444

M18-39

10444

20M→21M

20.0 - 21.0 mi

Top 74%
×8stories
+106ft-24ft

Overall

21152

Males

12567

M18-39

12567

21M→35K

21.0 - 21.8 mi

Top 82%
×7stories
+17ft-86ft

Overall

23318

Males

13538

M18-39

13538

35K→23M

21.8 - 23.0 mi

Top 67%
×5stories
+23ft-63ft

Overall

19058

Males

11464

M18-39

11464

23M→24M

23.0 - 24.0 mi

Top 51%
×6stories
+12ft-82ft

Overall

14469

Males

9354

M18-39

9354

24M→40K

24.0 - 24.9 mi

Top 51%
×1story
+6ft-20ft

Overall

14432

Males

9181

M18-39

9181

40K→25.2M

24.9 - 25.2 mi

Top 78%
×1story
+13ft-16ft

Overall

22133

Males

12838

M18-39

12838

25.2M→Finish

25.2 - 26.2 mi

Top 72%
×2stories
+22ft-21ft

Overall

20312

Males

11955

M18-39

11955

Passing Analysis

Category:
Athletes Passed
1215
Passed By
5754
Net Change
-4541
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6713
5K → 10K30597+208#6713#6505
10K → 15K36235+327#6505#6178
15K → 20K26934+235#6178#5943
20K → Half2618+8#5943#5935
Half → 25K93242-149#5935#6084
25K → 30K35956-921#6084#7005
30K → 20M17591-574#7005#7579
20M → 21M51015-1010#7579#8589
21M → 35K1867-866#8589#9455
35K → 23M15765-752#9455#10207
23M → 24M36231-195#10207#10402
24M → 40K36170-134#10402#10536
40K → 25.2M7283-276#10536#10812
25.2M → Finish8450-442#10812#11254
TOTALS12155754-4541
📊

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