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BOSTON MARATHON 2025

Colin Congdon

Bib: 28581•M

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
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
30:35
Rank: #25184
Start → 5K
30:35 | 9:51/mi
10K· 6.21 mi
58:23
Rank: #23866 (+1318)
5K → 10K
27:48 | 8:57/mi
15K· 9.32 mi
1:25:44
Rank: #23100 (+766)
10K → 15K
27:21 | 8:48/mi
20K· 12.43 mi
1:53:10
Rank: #22382 (+718)
15K → 20K
27:26 | 8:50/mi
Half· 13.11 mi
1:59:07
Rank: #22291 (+91)
20K → Half
5:57 | 8:43/mi
25K· 15.53 mi
2:20:47
Rank: #21845 (+446)
Half → 25K
21:40 | 8:56/mi
30K· 18.64 mi
2:49:57
Rank: #21390 (+455)
25K → 30K
29:10 | 9:23/mi
20M
3:02:42
Rank: #21182 (+208)
30K → 20M
12:45 | 9:23/mi
21M
3:12:28
Rank: #20952 (+230)
20M → 21M
9:46 | 9:46/mi
35K· 21.75 mi
3:19:25
Rank: #20896 (+56)
21M → 35K
6:57 | 9:17/mi
23M
3:31:31
Rank: #20809 (+87)
35K → 23M
12:06 | 9:40/mi
24M
3:41:17
Rank: #20813 (-4)
23M → 24M
9:46 | 9:46/mi
40K· 24.85 mi
3:50:08
Rank: #20854 (-41)
24M → 40K
8:51 | 10:21/mi
25.2M
3:54:04
Rank: #20864 (-10)
40K → 25.2M
3:56 | 11:24/mi
Finish· 26.22 mi
4:03:11
Rank: #20794 (+70)
25.2M → Finish
9:07 | 8:57/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:59:07
Pace9:05 /mi
2nd Half
Distance13.11 mi
Time2:04:04
Pace9:28 /mi
📊Positive Split: 4.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:48:1730:359:5130:35
9:51
-
10K
6.21 mi12:16:0558:239:2427:48
8:57
-0:54
15K
9.32 mi12:43:261:25:449:1227:21
8:48
-0:09
20K
12.43 mi13:10:521:53:109:0627:26
8:50
+0:02
Half
13.11 mi13:16:491:59:079:055:57
8:43
-0:07
25K
15.53 mi13:38:292:20:479:0421:40
8:56
+0:13
30K
18.64 mi14:07:392:49:579:0729:10
9:23
+0:27
20M
20.00 mi14:20:243:02:429:0812:45
9:23
0:00
21M
21.00 mi14:30:103:12:289:109:46
9:46
+0:23
35K
21.75 mi14:37:073:19:259:106:57
9:17
-0:29
23M
23.00 mi14:49:133:31:319:1212:06
9:40
+0:23
24M
24.00 mi14:58:593:41:179:139:46
9:46
+0:06
40K
24.85 mi15:07:503:50:089:168:51
10:21
+0:35
25.2M
25.20 mi15:11:463:54:049:173:56
11:24
+1:03
Finish
26.22 mi15:20:534:03:119:179:07
8:57
-2:27

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

8:43 /mi

Average Pace

9:17 /mi

Slowest Pace

11:24 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:59:19

49% of race

Time at Steady Pace

1:00:58

25% of race

Time at Slower Pace

1:02:54

26% of race

Average Pace: 9:16 /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 mi11:48:1730:359:5130:35
9:51
#25184
10K
6.21 mi12:16:0558:239:2427:48
8:57
#23866
15K
9.32 mi12:43:261:25:449:1227:21
8:48
#23100
20K
12.43 mi13:10:521:53:109:0627:26
8:50
#22382
Half
13.11 mi13:16:491:59:079:055:57
8:43
#22291
25K
15.53 mi13:38:292:20:479:0421:40
8:56
#21845
30K
18.64 mi14:07:392:49:579:0729:10
9:23
#21390
20M
20.00 mi14:20:243:02:429:0812:45
9:23
#21182
21M
21.00 mi14:30:103:12:289:109:46
9:46
#20952
35K
21.75 mi14:37:073:19:259:106:57
9:17
#20896
23M
23.00 mi14:49:133:31:319:1212:06
9:40
#20809
24M
24.00 mi14:58:593:41:179:139:46
9:46
#20813
40K
24.85 mi15:07:503:50:089:168:51
10:21
#20854
25.2M
25.20 mi15:11:463:54:049:173:56
11:24
#20864
Finish
26.22 mi15:20:534:03:119:179:07
8:57
#20794
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi25184148171481721028(Top 74%)12947(Top 80%)12947(Top 229%)
10K6.21 mi3.10 mi23866+131814192+62514192+62522139(Top 78%)13401(Top 83%)13401(Top 238%)
15K9.32 mi3.11 mi23100+76613848+34413848+34421028(Top 74%)12947(Top 80%)12947(Top 229%)
20K12.43 mi3.11 mi22382+71813518+33013518+33020096(Top 71%)12509(Top 78%)12509(Top 222%)
Half13.11 mi0.68 mi22291+9113469+4913469+4920453(Top 72%)12669(Top 79%)12669(Top 225%)
25K15.53 mi2.42 mi21845+44613258+21113258+21119618(Top 69%)12245(Top 76%)12245(Top 217%)
30K18.64 mi3.11 mi21390+45513035+22313035+22319484(Top 69%)12051(Top 75%)12051(Top 214%)
20M20.00 mi1.36 mi21182+20812915+12012915+12018672(Top 66%)11538(Top 72%)11538(Top 205%)
21M21.00 mi1.00 mi20952+23012801+11412801+11417334(Top 61%)10850(Top 67%)10850(Top 192%)
35K21.75 mi0.75 mi20896+5612760+4112760+4119531(Top 69%)11750(Top 73%)11750(Top 208%)
23M23.00 mi1.25 mi20809+8712695+6512695+6519325(Top 68%)11592(Top 72%)11592(Top 205%)
24M24.00 mi1.00 mi20813-412685+1012685+1020604(Top 73%)12161(Top 76%)12161(Top 216%)
40K24.85 mi0.85 mi20854-4112681+412681+421524(Top 76%)12528(Top 78%)12528(Top 222%)
25.2M25.20 mi0.35 mi20864-1012672+912672+921778(Top 77%)12675(Top 79%)12675(Top 225%)
Finish26.22 mi1.02 mi20794+7012626+4612626+4618760(Top 66%)11250(Top 70%)11250(Top 199%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 74%
×21stories
+97ft-345ft

Overall

21028

Males

12947

M18-39

12947

5K→10K

3.1 - 6.2 mi

Top 78%
×5stories
+79ft-138ft

Overall

22139

Males

13401

M18-39

13401

10K→15K

6.2 - 9.3 mi

Top 74%
×3stories
+67ft-78ft

Overall

21028

Males

12947

M18-39

12947

15K→20K

9.3 - 12.4 mi

Top 71%
×5stories
+106ft-86ft

Overall

20096

Males

12509

M18-39

12509

20K→Half

12.4 - 13.1 mi

Top 72%
×2stories
+19ft-37ft

Overall

20453

Males

12669

M18-39

12669

Half→25K

13.1 - 15.5 mi

Top 69%
×4stories
+66ft-88ft

Overall

19618

Males

12245

M18-39

12245

25K→30K

15.5 - 18.6 mi

Top 69%
×9stories
+181ft-148ft

Overall

19484

Males

12051

M18-39

12051

30K→20M

18.6 - 20.0 mi

Top 66%
×5stories
+64ft-50ft

Overall

18672

Males

11538

M18-39

11538

20M→21M

20.0 - 21.0 mi

Top 61%
×8stories
+106ft-24ft

Overall

17334

Males

10850

M18-39

10850

21M→35K

21.0 - 21.8 mi

Top 69%
×7stories
+17ft-86ft

Overall

19531

Males

11750

M18-39

11750

35K→23M

21.8 - 23.0 mi

Top 68%
×5stories
+23ft-63ft

Overall

19325

Males

11592

M18-39

11592

23M→24M

23.0 - 24.0 mi

Top 73%
×6stories
+12ft-82ft

Overall

20604

Males

12161

M18-39

12161

24M→40K

24.0 - 24.9 mi

Top 76%
×1story
+6ft-20ft

Overall

21524

Males

12528

M18-39

12528

40K→25.2M

24.9 - 25.2 mi

Top 77%
×1story
+13ft-16ft

Overall

21778

Males

12675

M18-39

12675

25.2M→Finish

25.2 - 26.2 mi

Top 66%
×2stories
+22ft-21ft

Overall

18760

Males

11250

M18-39

11250

Passing Analysis

Category:
Athletes Passed
4704
Passed By
314
Net Change
+4390
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25184
5K → 10K13191+1318#25184#23866
10K → 15K7726+766#23866#23100
15K → 20K7202+718#23100#22382
20K → Half910+91#22382#22291
Half → 25K4548+446#22291#21845
25K → 30K48025+455#21845#21390
30K → 20M2179+208#21390#21182
20M → 21M2377+230#21182#20952
21M → 35K8125+56#20952#20896
35K → 23M13548+87#20896#20809
23M → 24M5559-4#20809#20813
24M → 40K3980-41#20813#20854
40K → 25.2M2434-10#20854#20864
25.2M → Finish8010+70#20864#20794
TOTALS4704314+4390
📊

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