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BOSTON MARATHON 2025

Konstantinos Koudounas

Bib: 9757•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 23%
Gender (Male)
#0 / 16105
Top 35%
Masters (Masters Men)
#0 / 10463
Top 22%
Division (M45-49)
#0 / 2386
Top 30%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:55
Rank: #5736
Start → 5K
20:55 | 6:44/mi
10K· 6.21 mi
41:57
Rank: #5843 (-107)
5K → 10K
21:02 | 6:46/mi
15K· 9.32 mi
1:03:29
Rank: #6305 (-462)
10K → 15K
21:32 | 6:56/mi
20K· 12.43 mi
1:25:23
Rank: #6588 (-283)
15K → 20K
21:54 | 7:03/mi
Half· 13.11 mi
1:30:07
Rank: #6623 (-35)
20K → Half
4:44 | 6:56/mi
25K· 15.53 mi
1:47:23
Rank: #6671 (-48)
Half → 25K
17:16 | 7:07/mi
30K· 18.64 mi
2:10:21
Rank: #6610 (+61)
25K → 30K
22:58 | 7:24/mi
20M
2:20:42
Rank: #6604 (+6)
30K → 20M
10:21 | 7:37/mi
21M
2:29:14
Rank: #6739 (-135)
20M → 21M
8:32 | 8:32/mi
35K· 21.75 mi
2:34:33
Rank: #6673 (+66)
21M → 35K
5:19 | 7:06/mi
23M
2:44:29
Rank: #6760 (-87)
35K → 23M
9:56 | 7:56/mi
24M
2:51:42
Rank: #6652 (+108)
23M → 24M
7:13 | 7:13/mi
40K· 24.85 mi
2:58:06
Rank: #6609 (+43)
24M → 40K
6:24 | 7:29/mi
25.2M
3:00:58
Rank: #6604 (+5)
40K → 25.2M
2:52 | 8:19/mi
Finish· 26.22 mi
3:08:16
Rank: #6560 (+44)
25.2M → Finish
7:18 | 7:10/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:30:07
Pace6:52 /mi
2nd Half
Distance13.11 mi
Time1:38:09
Pace7:29 /mi
📊Positive Split: 8.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:46:4220:556:4420:55
6:44
-
10K
6.21 mi11:07:4441:576:4521:02
6:46
+0:02
15K
9.32 mi11:29:161:03:296:4921:32
6:56
+0:10
20K
12.43 mi11:51:101:25:236:5221:54
7:03
+0:07
Half
13.11 mi11:55:541:30:076:524:44
6:56
-0:07
25K
15.53 mi12:13:101:47:236:5517:16
7:07
+0:11
30K
18.64 mi12:36:082:10:217:0022:58
7:24
+0:17
20M
20.00 mi12:46:292:20:427:0210:21
7:37
+0:13
21M
21.00 mi12:55:012:29:147:068:32
8:32
+0:55
35K
21.75 mi13:00:202:34:337:065:19
7:06
-1:26
23M
23.00 mi13:10:162:44:297:099:56
7:56
+0:50
24M
24.00 mi13:17:292:51:427:097:13
7:13
-0:43
40K
24.85 mi13:23:532:58:067:106:24
7:29
+0:16
25.2M
25.20 mi13:26:453:00:587:112:52
8:19
+0:50
Finish
26.22 mi13:34:033:08:167:117:18
7:10
-1:09

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

6:44 /mi

Average Pace

7:11 /mi

Slowest Pace

8:32 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

41:57

22% of race

Time at Steady Pace

1:48:14

57% of race

Time at Slower Pace

38:05

20% of race

Average Pace: 7:11 /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 mi10:46:4220:556:4420:55
6:44
#5736
10K
6.21 mi11:07:4441:576:4521:02
6:46
#5843
15K
9.32 mi11:29:161:03:296:4921:32
6:56
#6305
20K
12.43 mi11:51:101:25:236:5221:54
7:03
#6588
Half
13.11 mi11:55:541:30:076:524:44
6:56
#6623
25K
15.53 mi12:13:101:47:236:5517:16
7:07
#6671
30K
18.64 mi12:36:082:10:217:0022:58
7:24
#6610
20M
20.00 mi12:46:292:20:427:0210:21
7:37
#6604
21M
21.00 mi12:55:012:29:147:068:32
8:32
#6739
35K
21.75 mi13:00:202:34:337:065:19
7:06
#6673
23M
23.00 mi13:10:162:44:297:099:56
7:56
#6760
24M
24.00 mi13:17:292:51:427:097:13
7:13
#6652
40K
24.85 mi13:23:532:58:067:106:24
7:29
#6609
25.2M
25.20 mi13:26:453:00:587:112:52
8:19
#6604
Finish
26.22 mi13:34:033:08:167:117:18
7:10
#6560
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi5736529852987167(Top 25%)6373(Top 40%)6373(Top 267%)
10K6.21 mi3.10 mi5843-1075381-835381-836059(Top 21%)5536(Top 34%)5536(Top 232%)
15K9.32 mi3.11 mi6305-4625753-3725753-3727167(Top 25%)6373(Top 40%)6373(Top 267%)
20K12.43 mi3.11 mi6588-2835951-1985951-1987181(Top 25%)6331(Top 39%)6331(Top 265%)
Half13.11 mi0.68 mi6623-355981-305981-307137(Top 25%)6314(Top 39%)6314(Top 265%)
25K15.53 mi2.42 mi6671-485999-185999-187099(Top 25%)6189(Top 38%)6189(Top 259%)
30K18.64 mi3.11 mi6610+615916+835916+837001(Top 25%)5972(Top 37%)5972(Top 250%)
20M20.00 mi1.36 mi6604+65887+295887+297779(Top 27%)6300(Top 39%)6300(Top 264%)
21M21.00 mi1.00 mi6739-1355967-805967-8010648(Top 37%)7680(Top 48%)7680(Top 322%)
35K21.75 mi0.75 mi6673+665902+655902+656030(Top 21%)5087(Top 32%)5087(Top 213%)
23M23.00 mi1.25 mi6760-875928-265928-269495(Top 33%)6966(Top 43%)6966(Top 292%)
24M24.00 mi1.00 mi6652+1085824+1045824+1045922(Top 21%)4870(Top 30%)4870(Top 204%)
40K24.85 mi0.85 mi6609+435769+555769+556708(Top 24%)5265(Top 33%)5265(Top 221%)
25.2M25.20 mi0.35 mi6604+55755+145755+147660(Top 27%)5719(Top 36%)5719(Top 240%)
Finish26.22 mi1.02 mi6560+445697+585697+586794(Top 24%)5204(Top 32%)5204(Top 218%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 25%
×21stories
+97ft-345ft

Overall

7167

Males

6373

M45-49

6373

5K→10K

3.1 - 6.2 mi

Top 21%
×5stories
+79ft-138ft

Overall

6059

Males

5536

M45-49

5536

10K→15K

6.2 - 9.3 mi

Top 25%
×3stories
+67ft-78ft

Overall

7167

Males

6373

M45-49

6373

15K→20K

9.3 - 12.4 mi

Top 25%
×5stories
+106ft-86ft

Overall

7181

Males

6331

M45-49

6331

20K→Half

12.4 - 13.1 mi

Top 25%
×2stories
+19ft-37ft

Overall

7137

Males

6314

M45-49

6314

Half→25K

13.1 - 15.5 mi

Top 25%
×4stories
+66ft-88ft

Overall

7099

Males

6189

M45-49

6189

25K→30K

15.5 - 18.6 mi

Top 25%
×9stories
+181ft-148ft

Overall

7001

Males

5972

M45-49

5972

30K→20M

18.6 - 20.0 mi

Top 27%
×5stories
+64ft-50ft

Overall

7779

Males

6300

M45-49

6300

20M→21M

20.0 - 21.0 mi

Top 37%
×8stories
+106ft-24ft

Overall

10648

Males

7680

M45-49

7680

21M→35K

21.0 - 21.8 mi

Top 21%
×7stories
+17ft-86ft

Overall

6030

Males

5087

M45-49

5087

35K→23M

21.8 - 23.0 mi

Top 33%
×5stories
+23ft-63ft

Overall

9495

Males

6966

M45-49

6966

23M→24M

23.0 - 24.0 mi

Top 21%
×6stories
+12ft-82ft

Overall

5922

Males

4870

M45-49

4870

24M→40K

24.0 - 24.9 mi

Top 24%
×1story
+6ft-20ft

Overall

6708

Males

5265

M45-49

5265

40K→25.2M

24.9 - 25.2 mi

Top 27%
×1story
+13ft-16ft

Overall

7660

Males

5719

M45-49

5719

25.2M→Finish

25.2 - 26.2 mi

Top 24%
×2stories
+22ft-21ft

Overall

6794

Males

5204

M45-49

5204

Passing Analysis

Category:
Athletes Passed
1178
Passed By
2002
Net Change
-824
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5736
5K → 10K130237-107#5736#5843
10K → 15K54516-462#5843#6305
15K → 20K75358-283#6305#6588
20K → Half1752-35#6588#6623
Half → 25K103151-48#6623#6671
25K → 30K204143+61#6671#6610
30K → 20M8983+6#6610#6604
20M → 21M32167-135#6604#6739
21M → 35K7812+66#6739#6673
35K → 23M66153-87#6673#6760
23M → 24M12618+108#6760#6652
24M → 40K7532+43#6652#6609
40K → 25.2M3530+5#6609#6604
25.2M → Finish9450+44#6604#6560
TOTALS11782002-824
📊

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