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BOSTON MARATHON 2025

Connor Koza

Bib: 4289•M

CA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 27%
Gender (Male)
#0 / 16105
Top 40%
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
20:28
Rank: #4504
Start → 5K
20:28 | 6:35/mi
10K· 6.21 mi
41:15
Rank: #4816 (-312)
5K → 10K
20:47 | 6:41/mi
15K· 9.32 mi
1:02:17
Rank: #5090 (-274)
10K → 15K
21:02 | 6:46/mi
20K· 12.43 mi
1:23:30
Rank: #5157 (-67)
15K → 20K
21:13 | 6:50/mi
Half· 13.11 mi
1:27:59
Rank: #5101 (+56)
20K → Half
4:29 | 6:34/mi
25K· 15.53 mi
1:45:08
Rank: #5444 (-343)
Half → 25K
17:09 | 7:04/mi
30K· 18.64 mi
2:07:57
Rank: #5699 (-255)
25K → 30K
22:49 | 7:21/mi
20M
2:18:34
Rank: #5930 (-231)
30K → 20M
10:37 | 7:49/mi
21M
2:27:06
Rank: #6122 (-192)
20M → 21M
8:32 | 8:32/mi
35K· 21.75 mi
2:32:51
Rank: #6196 (-74)
21M → 35K
5:45 | 7:41/mi
23M
2:43:22
Rank: #6434 (-238)
35K → 23M
10:31 | 8:24/mi
24M
2:51:49
Rank: #6696 (-262)
23M → 24M
8:27 | 8:27/mi
40K· 24.85 mi
2:59:33
Rank: #7045 (-349)
24M → 40K
7:44 | 9:03/mi
25.2M
3:02:57
Rank: #7177 (-132)
40K → 25.2M
3:24 | 9:52/mi
Finish· 26.22 mi
3:12:10
Rank: #7654 (-477)
25.2M → Finish
9:13 | 9:03/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:59
Pace6:43 /mi
2nd Half
Distance13.11 mi
Time1:44:11
Pace7:57 /mi
📊Positive Split: 18.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:1620:286:3520:28
6:35
-
10K
6.21 mi10:44:0341:156:3820:47
6:41
+0:06
15K
9.32 mi11:05:051:02:176:4121:02
6:46
+0:05
20K
12.43 mi11:26:181:23:306:4321:13
6:50
+0:04
Half
13.11 mi11:30:471:27:596:434:29
6:34
-0:16
25K
15.53 mi11:47:561:45:086:4617:09
7:04
+0:30
30K
18.64 mi12:10:452:07:576:5222:49
7:21
+0:17
20M
20.00 mi12:21:222:18:346:5610:37
7:49
+0:28
21M
21.00 mi12:29:542:27:067:008:32
8:32
+0:43
35K
21.75 mi12:35:392:32:517:025:45
7:41
-0:51
23M
23.00 mi12:46:102:43:227:0610:31
8:24
+0:43
24M
24.00 mi12:54:372:51:497:108:27
8:27
+0:03
40K
24.85 mi13:02:212:59:337:137:44
9:03
+0:36
25.2M
25.20 mi13:05:453:02:577:163:24
9:52
+0:49
Finish
26.22 mi13:14:583:12:107:209:13
9:03
-0:49

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

6:34 /mi

Average Pace

7:20 /mi

Slowest Pace

9:52 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:45:08

55% of race

Time at Steady Pace

39:11

20% of race

Time at Slower Pace

47:51

25% of race

Average Pace: 7:20 /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 mi10:23:1620:286:3520:28
6:35
#4504
10K
6.21 mi10:44:0341:156:3820:47
6:41
#4816
15K
9.32 mi11:05:051:02:176:4121:02
6:46
#5090
20K
12.43 mi11:26:181:23:306:4321:13
6:50
#5157
Half
13.11 mi11:30:471:27:596:434:29
6:34
#5101
25K
15.53 mi11:47:561:45:086:4617:09
7:04
#5444
30K
18.64 mi12:10:452:07:576:5222:49
7:21
#5699
20M
20.00 mi12:21:222:18:346:5610:37
7:49
#5930
21M
21.00 mi12:29:542:27:067:008:32
8:32
#6122
35K
21.75 mi12:35:392:32:517:025:45
7:41
#6196
23M
23.00 mi12:46:102:43:227:0610:31
8:24
#6434
24M
24.00 mi12:54:372:51:497:108:27
8:27
#6696
40K
24.85 mi13:02:212:59:337:137:44
9:03
#7045
25.2M
25.20 mi13:05:453:02:577:163:24
9:52
#7177
Finish
26.22 mi13:14:583:12:107:209:13
9:03
#7654
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi4504423642365791(Top 20%)5280(Top 33%)5280(Top 94%)
10K6.21 mi3.10 mi4816-3124504-2684504-2685266(Top 19%)4887(Top 30%)4887(Top 87%)
15K9.32 mi3.11 mi5090-2744739-2354739-2355791(Top 20%)5280(Top 33%)5280(Top 94%)
20K12.43 mi3.11 mi5157-674783-444783-445607(Top 20%)5114(Top 32%)5114(Top 91%)
Half13.11 mi0.68 mi5101+564735+484735+484241(Top 15%)3980(Top 25%)3980(Top 71%)
25K15.53 mi2.42 mi5444-3435009-2745009-2746808(Top 24%)5985(Top 37%)5985(Top 106%)
30K18.64 mi3.11 mi5699-2555198-1895198-1896720(Top 24%)5798(Top 36%)5798(Top 103%)
20M20.00 mi1.36 mi5930-2315369-1715369-1719083(Top 32%)7033(Top 44%)7033(Top 125%)
21M21.00 mi1.00 mi6122-1925498-1295498-12910652(Top 38%)7684(Top 48%)7684(Top 136%)
35K21.75 mi0.75 mi6196-745552-545552-549900(Top 35%)7300(Top 45%)7300(Top 129%)
23M23.00 mi1.25 mi6434-2385703-1515703-15112639(Top 44%)8525(Top 53%)8525(Top 151%)
24M24.00 mi1.00 mi6696-2625861-1585861-15814164(Top 50%)9206(Top 57%)9206(Top 163%)
40K24.85 mi0.85 mi7045-3496064-2036064-20316521(Top 58%)10142(Top 63%)10142(Top 180%)
25.2M25.20 mi0.35 mi7177-1326140-766140-7616271(Top 57%)9981(Top 62%)9981(Top 177%)
Finish26.22 mi1.02 mi7654-4776409-2696409-26919231(Top 68%)11439(Top 71%)11439(Top 203%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 20%
×21stories
+97ft-345ft

Overall

5791

Males

5280

M18-39

5280

5K→10K

3.1 - 6.2 mi

Top 19%
×5stories
+79ft-138ft

Overall

5266

Males

4887

M18-39

4887

10K→15K

6.2 - 9.3 mi

Top 20%
×3stories
+67ft-78ft

Overall

5791

Males

5280

M18-39

5280

15K→20K

9.3 - 12.4 mi

Top 20%
×5stories
+106ft-86ft

Overall

5607

Males

5114

M18-39

5114

20K→Half

12.4 - 13.1 mi

Top 15%
×2stories
+19ft-37ft

Overall

4241

Males

3980

M18-39

3980

Half→25K

13.1 - 15.5 mi

Top 24%
×4stories
+66ft-88ft

Overall

6808

Males

5985

M18-39

5985

25K→30K

15.5 - 18.6 mi

Top 24%
×9stories
+181ft-148ft

Overall

6720

Males

5798

M18-39

5798

30K→20M

18.6 - 20.0 mi

Top 32%
×5stories
+64ft-50ft

Overall

9083

Males

7033

M18-39

7033

20M→21M

20.0 - 21.0 mi

Top 38%
×8stories
+106ft-24ft

Overall

10652

Males

7684

M18-39

7684

21M→35K

21.0 - 21.8 mi

Top 35%
×7stories
+17ft-86ft

Overall

9900

Males

7300

M18-39

7300

35K→23M

21.8 - 23.0 mi

Top 44%
×5stories
+23ft-63ft

Overall

12639

Males

8525

M18-39

8525

23M→24M

23.0 - 24.0 mi

Top 50%
×6stories
+12ft-82ft

Overall

14164

Males

9206

M18-39

9206

24M→40K

24.0 - 24.9 mi

Top 58%
×1story
+6ft-20ft

Overall

16521

Males

10142

M18-39

10142

40K→25.2M

24.9 - 25.2 mi

Top 57%
×1story
+13ft-16ft

Overall

16271

Males

9981

M18-39

9981

25.2M→Finish

25.2 - 26.2 mi

Top 68%
×2stories
+22ft-21ft

Overall

19231

Males

11439

M18-39

11439

Passing Analysis

Category:
Athletes Passed
572
Passed By
3722
Net Change
-3150
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4504
5K → 10K65377-312#4504#4816
10K → 15K45319-274#4816#5090
15K → 20K95162-67#5090#5157
20K → Half604+56#5157#5101
Half → 25K41384-343#5101#5444
25K → 30K116371-255#5444#5699
30K → 20M21252-231#5699#5930
20M → 21M27219-192#5930#6122
21M → 35K1993-74#6122#6196
35K → 23M36274-238#6196#6434
23M → 24M20282-262#6434#6696
24M → 40K13362-349#6696#7045
40K → 25.2M8140-132#7045#7177
25.2M → Finish6483-477#7177#7654
TOTALS5723722-3150
📊

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