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BOSTON MARATHON 2025

Nadine De Decker

Bib: 29383•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F55-59)
#0 / 994
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
11:48/mi
36:41
↑ 97↓ 3451.5%
10K· 6.21 mi
11:48/mi
1:13:22
↑ 79↓ 1380.4%
15K· 9.32 mi
11:48/mi
1:50:03
↑ 67↓ 78
20K· 12.43 mi
11:48/mi
2:26:44
↑ 106↓ 860.1%
Half· 13.11 mi
11:48/mi
2:34:48
↑ 19↓ 370.5%
25K· 15.53 mi
11:48/mi
3:03:25
↑ 66↓ 880.2%
30K· 18.64 mi
11:48/mi
3:40:07
↑ 181↓ 1480.2%
20M
11:48/mi
3:56:09
↑ 64↓ 500.2%
21M
11:48/mi
4:07:58
↑ 106↓ 241.6%
35K· 21.75 mi
11:48/mi
4:16:48
↑ 17↓ 861.7%
23M
11:48/mi
4:31:35
↑ 23↓ 630.6%
24M
11:48/mi
4:43:23
↓ 821.3%
40K· 24.85 mi
11:48/mi
4:53:29
↓ 200.3%
25.2M
11:48/mi
4:57:33
↑ 13↓ 160.2%
Finish· 26.22 mi
11:48/mi
5:09:35
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time2:34:48
Pace11:48 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time2:34:47
Pace11:48 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:56:1636:4111:4836:41
11:48
-
10K
6.21 mi12:32:571:13:2211:4836:41
11:48
0:00
15K
9.32 mi13:09:381:50:0311:4836:41
11:48
0:00
20K
12.43 mi13:46:192:26:4411:4836:41
11:48
0:00
Half
13.11 mi13:54:232:34:4811:488:03
11:48
0:00
25K
15.53 mi14:23:003:03:2511:4828:38
11:48
0:00
30K
18.64 mi14:59:423:40:0711:4836:41
11:48
0:00
20M
20.00 mi15:15:443:56:0911:4816:03
11:48
0:00
21M
21.00 mi15:27:334:07:5811:4811:48
11:48
0:00
35K
21.75 mi15:36:234:16:4811:488:50
11:48
0:00
23M
23.00 mi15:51:104:31:3511:4814:47
11:48
0:00
24M
24.00 mi16:02:584:43:2311:4811:48
11:48
0:00
40K
24.85 mi16:13:044:53:2911:4810:06
11:48
0:00
25.2M
25.20 mi16:17:084:57:3311:484:04
11:48
0:00
Finish
26.22 mi16:29:105:09:3511:4912:02
11:48
0:00

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

11:48 /mi

Average Pace

11:49 /mi

Slowest Pace

11:48 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

5:09:35

100% of race

Time at Steady Pace

0:00

0% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 11:48 /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 mi11:56:1636:4111:4836:41
11:48
#28186
10K
6.21 mi12:32:571:13:2211:4836:41
11:48
#28034
15K
9.32 mi13:09:381:50:0311:4836:41
11:48
#27885
20K
12.43 mi13:46:192:26:4411:4836:41
11:48
#27679
Half
13.11 mi13:54:232:34:4811:488:03
11:48
#27664
25K
15.53 mi14:23:003:03:2511:4828:38
11:48
#27422
30K
18.64 mi14:59:423:40:0711:4836:41
11:48
#27102
20M
20.00 mi15:15:443:56:0911:4816:03
11:48
#27007
21M
21.00 mi15:27:334:07:5811:4811:48
11:48
#26880
35K
21.75 mi15:36:234:16:4811:488:50
11:48
#26839
23M
23.00 mi15:51:104:31:3511:4814:47
11:48
#26744
24M
24.00 mi16:02:584:43:2311:4811:48
11:48
#26701
40K
24.85 mi16:13:044:53:2911:4810:06
11:48
#26651
25.2M
25.20 mi16:17:084:57:3311:484:04
11:48
#26612
Finish
26.22 mi16:29:105:09:3511:4912:02
11:48
#26627
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi28186120841208427503(Top 97%)11683(Top 96%)11683(Top 1175%)
10K6.21 mi3.10 mi28034+15211987+9711987+9727837(Top 98%)11864(Top 97%)11864(Top 1194%)
15K9.32 mi3.11 mi27885+14911898+8911898+8927503(Top 97%)11683(Top 96%)11683(Top 1175%)
20K12.43 mi3.11 mi27679+20611783+11511783+11526940(Top 95%)11357(Top 93%)11357(Top 1143%)
Half13.11 mi0.68 mi27664+1511775+811775+827309(Top 96%)11593(Top 95%)11593(Top 1166%)
25K15.53 mi2.42 mi27422+24211633+14211633+14226215(Top 92%)10978(Top 90%)10978(Top 1104%)
30K18.64 mi3.11 mi27102+32011458+17511458+17525332(Top 89%)10574(Top 86%)10574(Top 1064%)
20M20.00 mi1.36 mi27007+9511406+5211406+5224981(Top 88%)10461(Top 86%)10461(Top 1052%)
21M21.00 mi1.00 mi26880+12711344+6211344+6223225(Top 82%)9618(Top 79%)9618(Top 968%)
35K21.75 mi0.75 mi26839+4111327+1711327+1725589(Top 90%)10894(Top 89%)10894(Top 1096%)
23M23.00 mi1.25 mi26744+9511282+4511282+4524793(Top 87%)10495(Top 86%)10495(Top 1056%)
24M24.00 mi1.00 mi26701+4311271+1111271+1125418(Top 89%)10837(Top 89%)10837(Top 1090%)
40K24.85 mi0.85 mi26651+5011248+2311248+2324635(Top 87%)10494(Top 86%)10494(Top 1056%)
25.2M25.20 mi0.35 mi26612+3911228+2011228+2022815(Top 80%)9583(Top 78%)9583(Top 964%)
Finish26.22 mi1.02 mi26627-1511246-1811246-1826547(Top 93%)11409(Top 93%)11409(Top 1148%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 97%
×21story building
+97ft-345ft

Overall

27503

Females

11683

F55-59

11683

5K→10K

3.1 - 6.2 mi

Top 98%
×5story building
+79ft-138ft

Overall

27837

Females

11864

F55-59

11864

10K→15K

6.2 - 9.3 mi

Top 97%
×3story building
+67ft-78ft

Overall

27503

Females

11683

F55-59

11683

15K→20K

9.3 - 12.4 mi

Top 95%
×5story building
+106ft-86ft

Overall

26940

Females

11357

F55-59

11357

20K→Half

12.4 - 13.1 mi

Top 96%
×2story building
+19ft-37ft

Overall

27309

Females

11593

F55-59

11593

Half→25K

13.1 - 15.5 mi

Top 92%
×4story building
+66ft-88ft

Overall

26215

Females

10978

F55-59

10978

25K→30K

15.5 - 18.6 mi

Top 89%
×9story building
+181ft-148ft

Overall

25332

Females

10574

F55-59

10574

30K→20M

18.6 - 20.0 mi

Top 88%
×5story building
+64ft-50ft

Overall

24981

Females

10461

F55-59

10461

20M→21M

20.0 - 21.0 mi

Top 82%
×8story building
+106ft-24ft

Overall

23225

Females

9618

F55-59

9618

21M→35K

21.0 - 21.8 mi

Top 90%
×7story building
+17ft-86ft

Overall

25589

Females

10894

F55-59

10894

35K→23M

21.8 - 23.0 mi

Top 87%
×5story building
+23ft-63ft

Overall

24793

Females

10495

F55-59

10495

23M→24M

23.0 - 24.0 mi

Top 89%
×6story building
+12ft-82ft

Overall

25418

Females

10837

F55-59

10837

24M→40K

24.0 - 24.9 mi

Top 87%
×1story
+6ft-20ft

Overall

24635

Females

10494

F55-59

10494

40K→25.2M

24.9 - 25.2 mi

Top 80%
×1story
+13ft-16ft

Overall

22815

Females

9583

F55-59

9583

25.2M→Finish

25.2 - 26.2 mi

Top 93%
×2story building
+22ft-21ft

Overall

26547

Females

11409

F55-59

11409

Passing Analysis

Category:
Athletes Passed
1639
Passed By
80
Net Change
+1559
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#28186
5K → 10K1608+152#28186#28034
10K → 15K16213+149#28034#27885
15K → 20K2082+206#27885#27679
20K → Half238+15#27679#27664
Half → 25K2431+242#27664#27422
25K → 30K3222+320#27422#27102
30K → 20M961+95#27102#27007
20M → 21M1270+127#27007#26880
21M → 35K454+41#26880#26839
35K → 23M994+95#26839#26744
23M → 24M518+43#26744#26701
24M → 40K533+50#26701#26651
40K → 25.2M401+39#26651#26612
25.2M → Finish1025-15#26612#26627
TOTALS163980+1559
📊

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