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BOSTON MARATHON 2025

Colin Alden

Bib: 19152•M

BC

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M55-59)
#0 / 1648
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:36
Rank: #18356
Start → 5K
25:36 | 8:14/mi
10K· 6.21 mi
52:00
Rank: #19048 (-692)
5K → 10K
26:24 | 8:30/mi
15K· 9.32 mi
1:18:54
Rank: #19454 (-406)
10K → 15K
26:54 | 8:39/mi
20K· 12.43 mi
1:47:29
Rank: #20124 (-670)
15K → 20K
28:35 | 9:12/mi
Half· 13.11 mi
1:53:32
Rank: #20179 (-55)
20K → Half
6:03 | 8:52/mi
25K· 15.53 mi
2:16:24
Rank: #20517 (-338)
Half → 25K
22:52 | 9:26/mi
30K· 18.64 mi
2:47:22
Rank: #20763 (-246)
25K → 30K
30:58 | 9:58/mi
20M
3:00:40
Rank: #20711 (+52)
30K → 20M
13:18 | 9:47/mi
21M
3:11:14
Rank: #20666 (+45)
20M → 21M
10:34 | 10:34/mi
35K· 21.75 mi
3:17:49
Rank: #20555 (+111)
21M → 35K
6:35 | 8:48/mi
23M
3:30:01
Rank: #20511 (+44)
35K → 23M
12:12 | 9:45/mi
24M
3:39:15
Rank: #20455 (+56)
23M → 24M
9:14 | 9:14/mi
40K· 24.85 mi
3:47:31
Rank: #20418 (+37)
24M → 40K
8:16 | 9:40/mi
25.2M
3:50:56
Rank: #20378 (+40)
40K → 25.2M
3:25 | 9:54/mi
Finish· 26.22 mi
3:59:23
Rank: #20231 (+147)
25.2M → Finish
8:27 | 8:18/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:53:32
Pace8:40 /mi
2nd Half
Distance13.11 mi
Time2:05:51
Pace9:36 /mi
📊Positive Split: 10.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:24:4725:368:1425:36
8:14
-
10K
6.21 mi11:51:1152:008:2226:24
8:30
+0:16
15K
9.32 mi12:18:051:18:548:2826:54
8:39
+0:09
20K
12.43 mi12:46:401:47:298:3928:35
9:12
+0:33
Half
13.11 mi12:52:431:53:328:406:03
8:52
-0:20
25K
15.53 mi13:15:352:16:248:4722:52
9:26
+0:34
30K
18.64 mi13:46:332:47:228:5930:58
9:58
+0:32
20M
20.00 mi13:59:513:00:409:0213:18
9:47
-0:11
21M
21.00 mi14:10:253:11:149:0610:34
10:34
+0:47
35K
21.75 mi14:17:003:17:499:066:35
8:48
-1:46
23M
23.00 mi14:29:123:30:019:0812:12
9:45
+0:57
24M
24.00 mi14:38:263:39:159:089:14
9:14
-0:31
40K
24.85 mi14:46:423:47:319:098:16
9:40
+0:26
25.2M
25.20 mi14:50:073:50:569:103:25
9:54
+0:14
Finish
26.22 mi14:58:343:59:239:088:27
8:18
-1:36

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

8:14 /mi

Average Pace

9:08 /mi

Slowest Pace

10:34 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:39:59

42% of race

Time at Steady Pace

1:00:41

25% of race

Time at Slower Pace

1:18:43

33% of race

Average Pace: 9:08 /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 mi11:24:4725:368:1425:36
8:14
#18356
10K
6.21 mi11:51:1152:008:2226:24
8:30
#19048
15K
9.32 mi12:18:051:18:548:2826:54
8:39
#19454
20K
12.43 mi12:46:401:47:298:3928:35
9:12
#20124
Half
13.11 mi12:52:431:53:328:406:03
8:52
#20179
25K
15.53 mi13:15:352:16:248:4722:52
9:26
#20517
30K
18.64 mi13:46:332:47:228:5930:58
9:58
#20763
20M
20.00 mi13:59:513:00:409:0213:18
9:47
#20711
21M
21.00 mi14:10:253:11:149:0610:34
10:34
#20666
35K
21.75 mi14:17:003:17:499:066:35
8:48
#20555
23M
23.00 mi14:29:123:30:019:0812:12
9:45
#20511
24M
24.00 mi14:38:263:39:159:089:14
9:14
#20455
40K
24.85 mi14:46:423:47:319:098:16
9:40
#20418
25.2M
25.20 mi14:50:073:50:569:103:25
9:54
#20378
Finish
26.22 mi14:58:343:59:239:088:27
8:18
#20231
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi18356117461174620245(Top 71%)12621(Top 78%)12621(Top 766%)
10K6.21 mi3.10 mi19048-69212061-31512061-31519777(Top 70%)12378(Top 77%)12378(Top 751%)
15K9.32 mi3.11 mi19454-40612242-18112242-18120245(Top 71%)12621(Top 78%)12621(Top 766%)
20K12.43 mi3.11 mi20124-67012529-28712529-28721885(Top 77%)13298(Top 83%)13298(Top 807%)
Half13.11 mi0.68 mi20179-5512543-1412543-1421187(Top 75%)12984(Top 81%)12984(Top 788%)
25K15.53 mi2.42 mi20517-33812678-13512678-13521644(Top 76%)13137(Top 82%)13137(Top 797%)
30K18.64 mi3.11 mi20763-24612743-6512743-6521505(Top 76%)12944(Top 80%)12944(Top 785%)
20M20.00 mi1.36 mi20711+5212705+3812705+3820248(Top 71%)12258(Top 76%)12258(Top 744%)
21M21.00 mi1.00 mi20666+4512670+3512670+3520209(Top 71%)12131(Top 75%)12131(Top 736%)
35K21.75 mi0.75 mi20555+11112605+6512605+6517242(Top 61%)10720(Top 67%)10720(Top 650%)
23M23.00 mi1.25 mi20511+4412564+4112564+4119586(Top 69%)11714(Top 73%)11714(Top 711%)
24M24.00 mi1.00 mi20455+5612522+4212522+4218502(Top 65%)11166(Top 69%)11166(Top 678%)
40K24.85 mi0.85 mi20418+3712486+3612486+3619346(Top 68%)11493(Top 71%)11493(Top 697%)
25.2M25.20 mi0.35 mi20378+4012459+2712459+2716589(Top 58%)10182(Top 63%)10182(Top 618%)
Finish26.22 mi1.02 mi20231+14712379+8012379+8014859(Top 52%)9429(Top 59%)9429(Top 572%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 71%
×21stories
+97ft-345ft

Overall

20245

Males

12621

M55-59

12621

5K→10K

3.1 - 6.2 mi

Top 70%
×5stories
+79ft-138ft

Overall

19777

Males

12378

M55-59

12378

10K→15K

6.2 - 9.3 mi

Top 71%
×3stories
+67ft-78ft

Overall

20245

Males

12621

M55-59

12621

15K→20K

9.3 - 12.4 mi

Top 77%
×5stories
+106ft-86ft

Overall

21885

Males

13298

M55-59

13298

20K→Half

12.4 - 13.1 mi

Top 75%
×2stories
+19ft-37ft

Overall

21187

Males

12984

M55-59

12984

Half→25K

13.1 - 15.5 mi

Top 76%
×4stories
+66ft-88ft

Overall

21644

Males

13137

M55-59

13137

25K→30K

15.5 - 18.6 mi

Top 76%
×9stories
+181ft-148ft

Overall

21505

Males

12944

M55-59

12944

30K→20M

18.6 - 20.0 mi

Top 71%
×5stories
+64ft-50ft

Overall

20248

Males

12258

M55-59

12258

20M→21M

20.0 - 21.0 mi

Top 71%
×8stories
+106ft-24ft

Overall

20209

Males

12131

M55-59

12131

21M→35K

21.0 - 21.8 mi

Top 61%
×7stories
+17ft-86ft

Overall

17242

Males

10720

M55-59

10720

35K→23M

21.8 - 23.0 mi

Top 69%
×5stories
+23ft-63ft

Overall

19586

Males

11714

M55-59

11714

23M→24M

23.0 - 24.0 mi

Top 65%
×6stories
+12ft-82ft

Overall

18502

Males

11166

M55-59

11166

24M→40K

24.0 - 24.9 mi

Top 68%
×1story
+6ft-20ft

Overall

19346

Males

11493

M55-59

11493

40K→25.2M

24.9 - 25.2 mi

Top 58%
×1story
+13ft-16ft

Overall

16589

Males

10182

M55-59

10182

25.2M→Finish

25.2 - 26.2 mi

Top 52%
×2stories
+22ft-21ft

Overall

14859

Males

9429

M55-59

9429

Passing Analysis

Category:
Athletes Passed
1276
Passed By
3151
Net Change
-1875
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18356
5K → 10K79771-692#18356#19048
10K → 15K73479-406#19048#19454
15K → 20K57727-670#19454#20124
20K → Half1671-55#20124#20179
Half → 25K76414-338#20179#20517
25K → 30K150396-246#20517#20763
30K → 20M12775+52#20763#20711
20M → 21M11671+45#20711#20666
21M → 35K1154+111#20666#20555
35K → 23M10460+44#20555#20511
23M → 24M8428+56#20511#20455
24M → 40K7235+37#20455#20418
40K → 25.2M5111+40#20418#20378
25.2M → Finish1569+147#20378#20231
TOTALS12763151-1875
📊

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