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BOSTON MARATHON 2025

Koenraad Zweers

Bib: 9653•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 15%
Gender (Male)
#0 / 16105
Top 24%
Masters (Masters Men)
#0 / 10463
Top 10%
Division (M45-49)
#0 / 2386
Top 13%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:53
Rank: #5626
Start → 5K
20:53 | 6:43/mi
10K· 6.21 mi
41:50
Rank: #5676 (-50)
5K → 10K
20:57 | 6:45/mi
15K· 9.32 mi
1:02:38
Rank: #5434 (+242)
10K → 15K
20:48 | 6:42/mi
20K· 12.43 mi
1:23:25
Rank: #5102 (+332)
15K → 20K
20:47 | 6:41/mi
Half· 13.11 mi
1:27:54
Rank: #5038 (+64)
20K → Half
4:29 | 6:34/mi
25K· 15.53 mi
1:44:15
Rank: #4897 (+141)
Half → 25K
16:21 | 6:45/mi
30K· 18.64 mi
2:05:38
Rank: #4642 (+255)
25K → 30K
21:23 | 6:53/mi
20M
2:15:04
Rank: #4542 (+100)
30K → 20M
9:26 | 6:57/mi
21M
2:22:15
Rank: #4400 (+142)
20M → 21M
7:11 | 7:11/mi
35K· 21.75 mi
2:27:08
Rank: #4287 (+113)
21M → 35K
4:53 | 6:32/mi
23M
2:35:54
Rank: #4219 (+68)
35K → 23M
8:46 | 7:00/mi
24M
2:43:00
Rank: #4235 (-16)
23M → 24M
7:06 | 7:06/mi
40K· 24.85 mi
2:49:06
Rank: #4240 (-5)
24M → 40K
6:06 | 7:08/mi
25.2M
2:51:44
Rank: #4236 (+4)
40K → 25.2M
2:38 | 7:38/mi
Finish· 26.22 mi
2:58:37
Rank: #4219 (+17)
25.2M → Finish
6:53 | 6:45/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:54
Pace6:42 /mi
2nd Half
Distance13.11 mi
Time1:30:43
Pace6:55 /mi
📊Positive Split: 3.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:46:5320:536:4320:53
6:43
-
10K
6.21 mi11:07:5041:506:4420:57
6:45
+0:02
15K
9.32 mi11:28:381:02:386:4320:48
6:42
-0:03
20K
12.43 mi11:49:251:23:256:4320:47
6:41
-0:01
Half
13.11 mi11:53:541:27:546:424:29
6:34
-0:07
25K
15.53 mi12:10:151:44:156:4316:21
6:45
+0:11
30K
18.64 mi12:31:382:05:386:4421:23
6:53
+0:08
20M
20.00 mi12:41:042:15:046:459:26
6:57
+0:04
21M
21.00 mi12:48:152:22:156:467:11
7:11
+0:14
35K
21.75 mi12:53:082:27:086:464:53
6:32
-0:39
23M
23.00 mi13:01:542:35:546:478:46
7:00
+0:28
24M
24.00 mi13:09:002:43:006:487:06
7:06
+0:06
40K
24.85 mi13:15:062:49:066:486:06
7:08
+0:02
25.2M
25.20 mi13:17:442:51:446:492:38
7:38
+0:30
Finish
26.22 mi13:24:372:58:376:496:53
6:45
-0:53

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

6:32 /mi

Average Pace

6:49 /mi

Slowest Pace

7:38 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:55:59

99% of race

Time at Steady Pace

2:38

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:49 /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 mi10:46:5320:536:4320:53
6:43
#5626
10K
6.21 mi11:07:5041:506:4420:57
6:45
#5676
15K
9.32 mi11:28:381:02:386:4320:48
6:42
#5434
20K
12.43 mi11:49:251:23:256:4320:47
6:41
#5102
Half
13.11 mi11:53:541:27:546:424:29
6:34
#5038
25K
15.53 mi12:10:151:44:156:4316:21
6:45
#4897
30K
18.64 mi12:31:382:05:386:4421:23
6:53
#4642
20M
20.00 mi12:41:042:15:046:459:26
6:57
#4542
21M
21.00 mi12:48:152:22:156:467:11
7:11
#4400
35K
21.75 mi12:53:082:27:086:464:53
6:32
#4287
23M
23.00 mi13:01:542:35:546:478:46
7:00
#4219
24M
24.00 mi13:09:002:43:006:487:06
7:06
#4235
40K
24.85 mi13:15:062:49:066:486:06
7:08
#4240
25.2M
25.20 mi13:17:442:51:446:492:38
7:38
#4236
Finish
26.22 mi13:24:372:58:376:496:53
6:45
#4219
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi5626520252025014(Top 18%)4659(Top 29%)4659(Top 195%)
10K6.21 mi3.10 mi5676-505243-415243-415736(Top 20%)5252(Top 33%)5252(Top 220%)
15K9.32 mi3.11 mi5434+2425026+2175026+2175014(Top 18%)4659(Top 29%)4659(Top 195%)
20K12.43 mi3.11 mi5102+3324737+2894737+2894329(Top 15%)4047(Top 25%)4047(Top 170%)
Half13.11 mi0.68 mi5038+644684+534684+534141(Top 15%)3880(Top 24%)3880(Top 163%)
25K15.53 mi2.42 mi4897+1414550+1344550+1344424(Top 16%)4096(Top 25%)4096(Top 172%)
30K18.64 mi3.11 mi4642+2554314+2364314+2363966(Top 14%)3654(Top 23%)3654(Top 153%)
20M20.00 mi1.36 mi4542+1004216+984216+983756(Top 13%)3455(Top 21%)3455(Top 145%)
21M21.00 mi1.00 mi4400+1424087+1294087+1293063(Top 11%)2828(Top 18%)2828(Top 119%)
35K21.75 mi0.75 mi4287+1133986+1013986+1012607(Top 9%)2426(Top 15%)2426(Top 102%)
23M23.00 mi1.25 mi4219+683918+683918+683756(Top 13%)3379(Top 21%)3379(Top 142%)
24M24.00 mi1.00 mi4235-163919-13919-15180(Top 18%)4370(Top 27%)4370(Top 183%)
40K24.85 mi0.85 mi4240-53915+43915+44637(Top 16%)3942(Top 24%)3942(Top 165%)
25.2M25.20 mi0.35 mi4236+43908+73908+73990(Top 14%)3406(Top 21%)3406(Top 143%)
Finish26.22 mi1.02 mi4219+173886+223886+224203(Top 15%)3580(Top 22%)3580(Top 150%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 18%
×21stories
+97ft-345ft

Overall

5014

Males

4659

M45-49

4659

5K→10K

3.1 - 6.2 mi

Top 20%
×5stories
+79ft-138ft

Overall

5736

Males

5252

M45-49

5252

10K→15K

6.2 - 9.3 mi

Top 18%
×3stories
+67ft-78ft

Overall

5014

Males

4659

M45-49

4659

15K→20K

9.3 - 12.4 mi

Top 15%
×5stories
+106ft-86ft

Overall

4329

Males

4047

M45-49

4047

20K→Half

12.4 - 13.1 mi

Top 15%
×2stories
+19ft-37ft

Overall

4141

Males

3880

M45-49

3880

Half→25K

13.1 - 15.5 mi

Top 16%
×4stories
+66ft-88ft

Overall

4424

Males

4096

M45-49

4096

25K→30K

15.5 - 18.6 mi

Top 14%
×9stories
+181ft-148ft

Overall

3966

Males

3654

M45-49

3654

30K→20M

18.6 - 20.0 mi

Top 13%
×5stories
+64ft-50ft

Overall

3756

Males

3455

M45-49

3455

20M→21M

20.0 - 21.0 mi

Top 11%
×8stories
+106ft-24ft

Overall

3063

Males

2828

M45-49

2828

21M→35K

21.0 - 21.8 mi

Top 9%
×7stories
+17ft-86ft

Overall

2607

Males

2426

M45-49

2426

35K→23M

21.8 - 23.0 mi

Top 13%
×5stories
+23ft-63ft

Overall

3756

Males

3379

M45-49

3379

23M→24M

23.0 - 24.0 mi

Top 18%
×6stories
+12ft-82ft

Overall

5180

Males

4370

M45-49

4370

24M→40K

24.0 - 24.9 mi

Top 16%
×1story
+6ft-20ft

Overall

4637

Males

3942

M45-49

3942

40K→25.2M

24.9 - 25.2 mi

Top 14%
×1story
+13ft-16ft

Overall

3990

Males

3406

M45-49

3406

25.2M→Finish

25.2 - 26.2 mi

Top 15%
×2stories
+22ft-21ft

Overall

4203

Males

3580

M45-49

3580

Passing Analysis

Category:
Athletes Passed
1980
Passed By
573
Net Change
+1407
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5626
5K → 10K156206-50#5626#5676
10K → 15K27129+242#5676#5434
15K → 20K34816+332#5434#5102
20K → Half684+64#5102#5038
Half → 25K17433+141#5038#4897
25K → 30K29843+255#4897#4642
30K → 20M12626+100#4642#4542
20M → 21M15513+142#4542#4400
21M → 35K1163+113#4400#4287
35K → 23M10133+68#4287#4219
23M → 24M5369-16#4219#4235
24M → 40K3843-5#4235#4240
40K → 25.2M2521+4#4240#4236
25.2M → Finish5134+17#4236#4219
TOTALS1980573+1407
📊

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