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BOSTON MARATHON 2025

Berty Klerkx

Bib: 14379•M

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

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
8:17/mi
25:44
↑ 97↓ 3451.5%
10K· 6.21 mi
8:12/mi
51:13
↑ 79↓ 1380.4%
15K· 9.32 mi
8:12/mi
1:16:42
↑ 67↓ 78
20K· 12.43 mi
8:15/mi
1:42:21
↑ 106↓ 860.1%
Half· 13.11 mi
8:10/mi
1:47:55
↑ 19↓ 370.5%
25K· 15.53 mi
8:22/mi
2:08:12
↑ 66↓ 880.2%
30K· 18.64 mi
8:36/mi
2:34:55
↑ 181↓ 1480.2%
20M
8:42/mi
2:46:45
↑ 64↓ 500.2%
21M
9:13/mi
2:55:58
↑ 106↓ 241.6%
35K· 21.75 mi
8:13/mi
3:02:07
↑ 17↓ 861.7%
23M
8:31/mi
3:12:47
↑ 23↓ 630.6%
24M
8:12/mi
3:20:59
↓ 821.3%
40K· 24.85 mi
8:16/mi
3:28:03
↓ 200.3%
25.2M
8:51/mi
3:31:06
↑ 13↓ 160.2%
Finish· 26.22 mi
7:51/mi
3:39:06
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:47:55
Pace8:14 /mi
2nd Half
Distance13.11 mi
Time1:51:11
Pace8:29 /mi
📊Positive Split: 3.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:56:4025:448:1725:44
8:17
-
10K
6.21 mi11:22:0951:138:1525:29
8:12
-0:05
15K
9.32 mi11:47:381:16:428:1425:29
8:12
0:00
20K
12.43 mi12:13:171:42:218:1425:39
8:15
+0:03
Half
13.11 mi12:18:511:47:558:145:34
8:10
-0:05
25K
15.53 mi12:39:082:08:128:1520:17
8:22
+0:12
30K
18.64 mi13:05:512:34:558:1926:43
8:36
+0:14
20M
20.00 mi13:17:412:46:458:2011:50
8:42
+0:06
21M
21.00 mi13:26:542:55:588:239:13
9:13
+0:31
35K
21.75 mi13:33:033:02:078:226:09
8:13
-1:00
23M
23.00 mi13:43:433:12:478:2310:40
8:31
+0:18
24M
24.00 mi13:51:553:20:598:228:12
8:12
-0:19
40K
24.85 mi13:58:593:28:038:227:04
8:16
+0:04
25.2M
25.20 mi14:02:023:31:068:233:03
8:51
+0:35
Finish
26.22 mi14:10:023:39:068:228:00
7:51
-1:00

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

7:51 /mi

Average Pace

8:22 /mi

Slowest Pace

9:13 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:15:00

89% of race

Time at Steady Pace

24:06

11% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:21 /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 mi10:56:4025:448:1725:44
8:17
#18591
10K
6.21 mi11:22:0951:138:1525:29
8:12
#18244
15K
9.32 mi11:47:381:16:428:1425:29
8:12
#17950
20K
12.43 mi12:13:171:42:218:1425:39
8:15
#17586
Half
13.11 mi12:18:511:47:558:145:34
8:10
#17543
25K
15.53 mi12:39:082:08:128:1520:17
8:22
#17289
30K
18.64 mi13:05:512:34:558:1926:43
8:36
#16891
20M
20.00 mi13:17:412:46:458:2011:50
8:42
#16747
21M
21.00 mi13:26:542:55:588:239:13
9:13
#16578
35K
21.75 mi13:33:033:02:078:226:09
8:13
#16441
23M
23.00 mi13:43:433:12:478:2310:40
8:31
#16211
24M
24.00 mi13:51:553:20:598:228:12
8:12
#16058
40K
24.85 mi13:58:593:28:038:227:04
8:16
#15880
25.2M
25.20 mi14:02:023:31:068:233:03
8:51
#15788
Finish
26.22 mi14:10:023:39:068:228:00
7:51
#15645
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi18591118571185717393(Top 61%)11388(Top 71%)11388(Top 691%)
10K6.21 mi3.10 mi18244+34711712+14511712+14517893(Top 63%)11602(Top 72%)11602(Top 704%)
15K9.32 mi3.11 mi17950+29411602+11011602+11017393(Top 61%)11388(Top 71%)11388(Top 691%)
20K12.43 mi3.11 mi17586+36411446+15611446+15616650(Top 59%)11025(Top 68%)11025(Top 669%)
Half13.11 mi0.68 mi17543+4311434+1211434+1216964(Top 60%)11155(Top 69%)11155(Top 677%)
25K15.53 mi2.42 mi17289+25411302+13211302+13216315(Top 57%)10778(Top 67%)10778(Top 654%)
30K18.64 mi3.11 mi16891+39811095+20711095+20715381(Top 54%)10224(Top 63%)10224(Top 620%)
20M20.00 mi1.36 mi16747+14411012+8311012+8315099(Top 53%)9963(Top 62%)9963(Top 605%)
21M21.00 mi1.00 mi16578+16910905+10710905+10714700(Top 52%)9664(Top 60%)9664(Top 586%)
35K21.75 mi0.75 mi16441+13710827+7810827+7813748(Top 48%)9171(Top 57%)9171(Top 556%)
23M23.00 mi1.25 mi16211+23010699+12810699+12813415(Top 47%)8900(Top 55%)8900(Top 540%)
24M24.00 mi1.00 mi16058+15310602+9710602+9712557(Top 44%)8451(Top 52%)8451(Top 513%)
40K24.85 mi0.85 mi15880+17810506+9610506+9611959(Top 42%)8040(Top 50%)8040(Top 488%)
25.2M25.20 mi0.35 mi15788+9210447+5910447+5910910(Top 38%)7463(Top 46%)7463(Top 453%)
Finish26.22 mi1.02 mi15645+14310365+8210365+8211814(Top 42%)7952(Top 49%)7952(Top 483%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 61%
×21story building
+97ft-345ft

Overall

17393

Males

11388

M55-59

11388

5K→10K

3.1 - 6.2 mi

Top 63%
×5story building
+79ft-138ft

Overall

17893

Males

11602

M55-59

11602

10K→15K

6.2 - 9.3 mi

Top 61%
×3story building
+67ft-78ft

Overall

17393

Males

11388

M55-59

11388

15K→20K

9.3 - 12.4 mi

Top 59%
×5story building
+106ft-86ft

Overall

16650

Males

11025

M55-59

11025

20K→Half

12.4 - 13.1 mi

Top 60%
×2story building
+19ft-37ft

Overall

16964

Males

11155

M55-59

11155

Half→25K

13.1 - 15.5 mi

Top 57%
×4story building
+66ft-88ft

Overall

16315

Males

10778

M55-59

10778

25K→30K

15.5 - 18.6 mi

Top 54%
×9story building
+181ft-148ft

Overall

15381

Males

10224

M55-59

10224

30K→20M

18.6 - 20.0 mi

Top 53%
×5story building
+64ft-50ft

Overall

15099

Males

9963

M55-59

9963

20M→21M

20.0 - 21.0 mi

Top 52%
×8story building
+106ft-24ft

Overall

14700

Males

9664

M55-59

9664

21M→35K

21.0 - 21.8 mi

Top 48%
×7story building
+17ft-86ft

Overall

13748

Males

9171

M55-59

9171

35K→23M

21.8 - 23.0 mi

Top 47%
×5story building
+23ft-63ft

Overall

13415

Males

8900

M55-59

8900

23M→24M

23.0 - 24.0 mi

Top 44%
×6story building
+12ft-82ft

Overall

12557

Males

8451

M55-59

8451

24M→40K

24.0 - 24.9 mi

Top 42%
×1story
+6ft-20ft

Overall

11959

Males

8040

M55-59

8040

40K→25.2M

24.9 - 25.2 mi

Top 38%
×1story
+13ft-16ft

Overall

10910

Males

7463

M55-59

7463

25.2M→Finish

25.2 - 26.2 mi

Top 42%
×2story building
+22ft-21ft

Overall

11814

Males

7952

M55-59

7952

Passing Analysis

Category:
Athletes Passed
3389
Passed By
443
Net Change
+2946
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18591
5K → 10K474127+347#18591#18244
10K → 15K35157+294#18244#17950
15K → 20K40844+364#17950#17586
20K → Half6320+43#17586#17543
Half → 25K29743+254#17543#17289
25K → 30K44648+398#17289#16891
30K → 20M17935+144#16891#16747
20M → 21M19425+169#16747#16578
21M → 35K1436+137#16578#16441
35K → 23M24919+230#16441#16211
23M → 24M1596+153#16211#16058
24M → 40K1791+178#16058#15880
40K → 25.2M931+92#15880#15788
25.2M → Finish15411+143#15788#15645
TOTALS3389443+2946
📊

Passing Visuals

Category:
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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