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BOSTON MARATHON 2025

Nathalie Dekerle

Bib: 15899•F

MI

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 35%
Gender (Female)
#0 / 12228
Top 18%
Masters (Masters Women)
#0 / 6759
Top 7%
Division (F45-49)
#0 / 1813
Top 8%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:01
Rank: #11420
Start → 5K
23:01 | 7:25/mi
10K· 6.21 mi
45:58
Rank: #11222 (+198)
5K → 10K
22:57 | 7:23/mi
15K· 9.32 mi
1:09:07
Rank: #11212 (+10)
10K → 15K
23:09 | 7:27/mi
20K· 12.43 mi
1:32:23
Rank: #11054 (+158)
15K → 20K
23:16 | 7:29/mi
Half· 13.11 mi
1:37:23
Rank: #11015 (+39)
20K → Half
5:00 | 7:20/mi
25K· 15.53 mi
1:55:38
Rank: #10837 (+178)
Half → 25K
18:15 | 7:32/mi
30K· 18.64 mi
2:20:02
Rank: #10690 (+147)
25K → 30K
24:24 | 7:51/mi
20M
2:30:45
Rank: #10583 (+107)
30K → 20M
10:43 | 7:53/mi
21M
2:39:05
Rank: #10492 (+91)
20M → 21M
8:20 | 8:20/mi
35K· 21.75 mi
2:44:49
Rank: #10439 (+53)
21M → 35K
5:44 | 7:40/mi
23M
2:54:33
Rank: #10266 (+173)
35K → 23M
9:44 | 7:46/mi
24M
3:02:04
Rank: #10114 (+152)
23M → 24M
7:31 | 7:31/mi
40K· 24.85 mi
3:08:41
Rank: #10008 (+106)
24M → 40K
6:37 | 7:44/mi
25.2M
3:11:35
Rank: #9948 (+60)
40K → 25.2M
2:54 | 8:25/mi
Finish· 26.22 mi
3:19:13
Rank: #9899 (+49)
25.2M → Finish
7:38 | 7:29/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:37:23
Pace7:26 /mi
2nd Half
Distance13.11 mi
Time1:41:50
Pace7:46 /mi
📊Positive Split: 4.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:54:1523:017:2523:01
7:25
-
10K
6.21 mi11:17:1245:587:2422:57
7:23
-0:02
15K
9.32 mi11:40:211:09:077:2523:09
7:27
+0:04
20K
12.43 mi12:03:371:32:237:2623:16
7:29
+0:02
Half
13.11 mi12:08:371:37:237:265:00
7:20
-0:09
25K
15.53 mi12:26:521:55:387:2718:15
7:32
+0:12
30K
18.64 mi12:51:162:20:027:3124:24
7:51
+0:19
20M
20.00 mi13:01:592:30:457:3210:43
7:53
+0:02
21M
21.00 mi13:10:192:39:057:358:20
8:20
+0:27
35K
21.75 mi13:16:032:44:497:355:44
7:40
-0:40
23M
23.00 mi13:25:472:54:337:359:44
7:46
+0:06
24M
24.00 mi13:33:183:02:047:357:31
7:31
-0:15
40K
24.85 mi13:39:553:08:417:356:37
7:44
+0:13
25.2M
25.20 mi13:42:493:11:357:362:54
8:25
+0:41
Finish
26.22 mi13:50:273:19:137:367:38
7:29
-0:56

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

7:20 /mi

Average Pace

7:36 /mi

Slowest Pace

8:25 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:07:59

94% of race

Time at Steady Pace

11:14

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:36 /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 mi10:54:1523:017:2523:01
7:25
#11420
10K
6.21 mi11:17:1245:587:2422:57
7:23
#11222
15K
9.32 mi11:40:211:09:077:2523:09
7:27
#11212
20K
12.43 mi12:03:371:32:237:2623:16
7:29
#11054
Half
13.11 mi12:08:371:37:237:265:00
7:20
#11015
25K
15.53 mi12:26:521:55:387:2718:15
7:32
#10837
30K
18.64 mi12:51:162:20:027:3124:24
7:51
#10690
20M
20.00 mi13:01:592:30:457:3210:43
7:53
#10583
21M
21.00 mi13:10:192:39:057:358:20
8:20
#10492
35K
21.75 mi13:16:032:44:497:355:44
7:40
#10439
23M
23.00 mi13:25:472:54:337:359:44
7:46
#10266
24M
24.00 mi13:33:183:02:047:357:31
7:31
#10114
40K
24.85 mi13:39:553:08:417:356:37
7:44
#10008
25.2M
25.20 mi13:42:493:11:357:362:54
8:25
#9948
Finish
26.22 mi13:50:273:19:137:367:38
7:29
#9899
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi114202489248911353(Top 40%)2555(Top 21%)2555(Top 141%)
10K6.21 mi3.10 mi11222+1982409+802409+8011093(Top 39%)2353(Top 19%)2353(Top 130%)
15K9.32 mi3.11 mi11212+102422-132422-1311353(Top 40%)2555(Top 21%)2555(Top 141%)
20K12.43 mi3.11 mi11054+1582369+532369+5310680(Top 38%)2303(Top 19%)2303(Top 127%)
Half13.11 mi0.68 mi11015+392344+252344+2510333(Top 36%)2113(Top 17%)2113(Top 117%)
25K15.53 mi2.42 mi10837+1782304+402304+4010204(Top 36%)2190(Top 18%)2190(Top 121%)
30K18.64 mi3.11 mi10690+1472302+22302+210320(Top 36%)2443(Top 20%)2443(Top 135%)
20M20.00 mi1.36 mi10583+1072296+62296+69640(Top 34%)2274(Top 19%)2274(Top 125%)
21M21.00 mi1.00 mi10492+912290+62290+69455(Top 33%)2351(Top 19%)2351(Top 130%)
35K21.75 mi0.75 mi10439+532280+102280+109823(Top 35%)2515(Top 21%)2515(Top 139%)
23M23.00 mi1.25 mi10266+1732249+312249+318429(Top 30%)2007(Top 16%)2007(Top 111%)
24M24.00 mi1.00 mi10114+1522198+512198+517865(Top 28%)1814(Top 15%)1814(Top 100%)
40K24.85 mi0.85 mi10008+1062175+232175+238391(Top 30%)2174(Top 18%)2174(Top 120%)
25.2M25.20 mi0.35 mi9948+602164+112164+118328(Top 29%)2208(Top 18%)2208(Top 122%)
Finish26.22 mi1.02 mi9899+492169-52169-59134(Top 32%)2591(Top 21%)2591(Top 143%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 40%
×21stories
+97ft-345ft

Overall

11353

Females

2555

F45-49

2555

5K→10K

3.1 - 6.2 mi

Top 39%
×5stories
+79ft-138ft

Overall

11093

Females

2353

F45-49

2353

10K→15K

6.2 - 9.3 mi

Top 40%
×3stories
+67ft-78ft

Overall

11353

Females

2555

F45-49

2555

15K→20K

9.3 - 12.4 mi

Top 38%
×5stories
+106ft-86ft

Overall

10680

Females

2303

F45-49

2303

20K→Half

12.4 - 13.1 mi

Top 36%
×2stories
+19ft-37ft

Overall

10333

Females

2113

F45-49

2113

Half→25K

13.1 - 15.5 mi

Top 36%
×4stories
+66ft-88ft

Overall

10204

Females

2190

F45-49

2190

25K→30K

15.5 - 18.6 mi

Top 36%
×9stories
+181ft-148ft

Overall

10320

Females

2443

F45-49

2443

30K→20M

18.6 - 20.0 mi

Top 34%
×5stories
+64ft-50ft

Overall

9640

Females

2274

F45-49

2274

20M→21M

20.0 - 21.0 mi

Top 33%
×8stories
+106ft-24ft

Overall

9455

Females

2351

F45-49

2351

21M→35K

21.0 - 21.8 mi

Top 35%
×7stories
+17ft-86ft

Overall

9823

Females

2515

F45-49

2515

35K→23M

21.8 - 23.0 mi

Top 30%
×5stories
+23ft-63ft

Overall

8429

Females

2007

F45-49

2007

23M→24M

23.0 - 24.0 mi

Top 28%
×6stories
+12ft-82ft

Overall

7865

Females

1814

F45-49

1814

24M→40K

24.0 - 24.9 mi

Top 30%
×1story
+6ft-20ft

Overall

8391

Females

2174

F45-49

2174

40K→25.2M

24.9 - 25.2 mi

Top 29%
×1story
+13ft-16ft

Overall

8328

Females

2208

F45-49

2208

25.2M→Finish

25.2 - 26.2 mi

Top 32%
×2stories
+22ft-21ft

Overall

9134

Females

2591

F45-49

2591

Passing Analysis

Category:
Athletes Passed
2483*
Passed By
962
Net Change
+1521
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11420
5K → 10K364166+198#11420#11222
10K → 15K202192+10#11222#11212
15K → 20K24789+158#11212#11054
20K → Half5920+39#11054#11015
Half → 25K25577+178#11015#10837
25K → 30K308161+147#10837#10690
30K → 20M15851+107#10690#10583
20M → 21M14958+91#10583#10492
21M → 35K8532+53#10492#10439
35K → 23M19724+173#10439#10266
23M → 24M1619+152#10266#10114
24M → 40K13529+106#10114#10008
40K → 25.2M66*6+60#10008#9948
25.2M → Finish9748+49#9948#9899
TOTALS2483*962+1521

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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