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BOSTON MARATHON 2025

Mark Pieter De Boer

Bib: 26755 M NL

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M50-54)
#0 / 1996
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
9:27/mi
29:22
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
9:25/mi
58:36
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
9:13/mi
1:27:13
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
9:17/mi
1:56:03
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
8:46/mi
2:02:02
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
9:21/mi
2:24:41
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
9:34/mi
2:54:25
↑ 181↓ 1480.2%
138 ft elev
20M
9:37/mi
3:07:29
↑ 64↓ 500.2%
148 ft elev
21M
10:05/mi
3:17:34
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
9:07/mi
3:24:23
↑ 17↓ 861.7%
156 ft elev
23M
9:43/mi
3:36:33
↑ 23↓ 630.6%
116 ft elev
24M
9:34/mi
3:46:07
↓ 821.3%
34 ft elev
40K· 24.85 mi
9:40/mi
3:54:23
↓ 200.3%
20 ft elev
25.2M
11:07/mi
3:58:13
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
9:24/mi
4:07:48
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:02:02
Pace9:19 /mi
2nd Half
Distance13.11 mi
Time2:05:46
Pace9:36 /mi
📊Positive Split: 3.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:48:5629:229:2729:22
9:27
-
10K
6.21 mi12:18:1058:369:2629:14
9:25
-0:02
15K
9.32 mi12:46:471:27:139:2128:37
9:13
-0:12
20K
12.43 mi13:15:371:56:039:2028:50
9:17
+0:04
Half
13.11 mi13:21:362:02:029:195:59
8:46
-0:31
25K
15.53 mi13:44:152:24:419:1922:39
9:21
+0:35
30K
18.64 mi14:13:592:54:259:2129:44
9:34
+0:13
20M
20.00 mi14:27:033:07:299:2213:04
9:37
+0:03
21M
21.00 mi14:37:083:17:349:2410:05
10:05
+0:28
35K
21.75 mi14:43:573:24:239:246:49
9:07
-0:58
23M
23.00 mi14:56:073:36:339:2512:10
9:43
+0:36
24M
24.00 mi15:05:413:46:079:259:34
9:34
-0:09
40K
24.85 mi15:13:573:54:239:268:16
9:40
+0:06
25.2M
25.20 mi15:17:473:58:139:273:50
11:07
+1:27
Finish
26.22 mi15:27:224:07:489:279:35
9:24
-1:43

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

8:46 /mi

Average Pace

9:27 /mi

Slowest Pace

11:07 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

12:48

5% of race

Time at Steady Pace

3:28:55

84% of race

Time at Slower Pace

26:05

11% of race

Average Pace: 9:27 /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 mi11:48:5629:229:2729:22
9:27
#24072
10K
6.21 mi12:18:1058:369:2629:14
9:25
#23974
15K
9.32 mi12:46:471:27:139:2128:37
9:13
#23620
20K
12.43 mi13:15:371:56:039:2028:50
9:17
#23247
Half
13.11 mi13:21:362:02:029:195:59
8:46
#23149
25K
15.53 mi13:44:152:24:419:1922:39
9:21
#22834
30K
18.64 mi14:13:592:54:259:2129:44
9:34
#22349
20M
20.00 mi14:27:033:07:299:2213:04
9:37
#22160
21M
21.00 mi14:37:083:17:349:2410:05
10:05
#21937
35K
21.75 mi14:43:573:24:239:246:49
9:07
#21824
23M
23.00 mi14:56:073:36:339:2512:10
9:43
#21663
24M
24.00 mi15:05:413:46:079:259:34
9:34
#21587
40K
24.85 mi15:13:573:54:239:268:16
9:40
#21495
25.2M
25.20 mi15:17:473:58:139:273:50
11:07
#21474
Finish
26.22 mi15:27:224:07:489:279:35
9:24
#21442
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi24072142741427422888(Top 81%)13785(Top 86%)13785(Top 691%)
10K6.21 mi3.10 mi23974+9814239+3514239+3523842(Top 84%)14191(Top 88%)14191(Top 711%)
15K9.32 mi3.11 mi23620+35414090+14914090+14922888(Top 81%)13785(Top 86%)13785(Top 691%)
20K12.43 mi3.11 mi23247+37313926+16413926+16422212(Top 78%)13449(Top 84%)13449(Top 674%)
Half13.11 mi0.68 mi23149+9813879+4713879+4720750(Top 73%)12804(Top 80%)12804(Top 641%)
25K15.53 mi2.42 mi22834+31513718+16113718+16121328(Top 75%)13002(Top 81%)13002(Top 651%)
30K18.64 mi3.11 mi22349+48513469+24913469+24920223(Top 71%)12396(Top 77%)12396(Top 621%)
20M20.00 mi1.36 mi22160+18913371+9813371+9819673(Top 69%)12009(Top 75%)12009(Top 602%)
21M21.00 mi1.00 mi21937+22313248+12313248+12318606(Top 66%)11437(Top 71%)11437(Top 573%)
35K21.75 mi0.75 mi21824+11313185+6313185+6318769(Top 66%)11395(Top 71%)11395(Top 571%)
23M23.00 mi1.25 mi21663+16113080+10513080+10519507(Top 69%)11671(Top 72%)11671(Top 585%)
24M24.00 mi1.00 mi21587+7613029+5113029+5119859(Top 70%)11801(Top 73%)11801(Top 591%)
40K24.85 mi0.85 mi21495+9212969+6012969+6019350(Top 68%)11497(Top 71%)11497(Top 576%)
25.2M25.20 mi0.35 mi21474+2112951+1812951+1820971(Top 74%)12279(Top 76%)12279(Top 615%)
Finish26.22 mi1.02 mi21442+3212916+3512916+3520825(Top 73%)12205(Top 76%)12205(Top 611%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 81%
×21story building
+97ft-345ft

Overall

22888

Males

13785

M50-54

13785

5K→10K

3.1 - 6.2 mi

Top 84%
×5story building
+79ft-138ft

Overall

23842

Males

14191

M50-54

14191

10K→15K

6.2 - 9.3 mi

Top 81%
×3story building
+67ft-78ft

Overall

22888

Males

13785

M50-54

13785

15K→20K

9.3 - 12.4 mi

Top 78%
×5story building
+106ft-86ft

Overall

22212

Males

13449

M50-54

13449

20K→Half

12.4 - 13.1 mi

Top 73%
×2story building
+19ft-37ft

Overall

20750

Males

12804

M50-54

12804

Half→25K

13.1 - 15.5 mi

Top 75%
×4story building
+66ft-88ft

Overall

21328

Males

13002

M50-54

13002

25K→30K

15.5 - 18.6 mi

Top 71%
×9story building
+181ft-148ft

Overall

20223

Males

12396

M50-54

12396

30K→20M

18.6 - 20.0 mi

Top 69%
×5story building
+64ft-50ft

Overall

19673

Males

12009

M50-54

12009

20M→21M

20.0 - 21.0 mi

Top 66%
×8story building
+106ft-24ft

Overall

18606

Males

11437

M50-54

11437

21M→35K

21.0 - 21.8 mi

Top 66%
×7story building
+17ft-86ft

Overall

18769

Males

11395

M50-54

11395

35K→23M

21.8 - 23.0 mi

Top 69%
×5story building
+23ft-63ft

Overall

19507

Males

11671

M50-54

11671

23M→24M

23.0 - 24.0 mi

Top 70%
×6story building
+12ft-82ft

Overall

19859

Males

11801

M50-54

11801

24M→40K

24.0 - 24.9 mi

Top 68%
×1story
+6ft-20ft

Overall

19350

Males

11497

M50-54

11497

40K→25.2M

24.9 - 25.2 mi

Top 74%
×1story
+13ft-16ft

Overall

20971

Males

12279

M50-54

12279

25.2M→Finish

25.2 - 26.2 mi

Top 73%
×2story building
+22ft-21ft

Overall

20825

Males

12205

M50-54

12205

Passing Analysis

Category:
Athletes Passed
2987
Passed By
357
Net Change
+2630
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24072
5K → 10K285187+98#24072#23974
10K → 15K37521+354#23974#23620
15K → 20K39219+373#23620#23247
20K → Half1013+98#23247#23149
Half → 25K32813+315#23149#22834
25K → 30K50116+485#22834#22349
30K → 20M1934+189#22349#22160
20M → 21M2274+223#22160#21937
21M → 35K1152+113#21937#21824
35K → 23M1698+161#21824#21663
23M → 24M9115+76#21663#21587
24M → 40K10311+92#21587#21495
40K → 25.2M3615+21#21495#21474
25.2M → Finish7139+32#21474#21442
TOTALS2987357+2630
📊

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