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BOSTON MARATHON 2025

Camilla Nielsen

Bib: 22443•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 41%
Masters (Masters Women)
#0 / 6759
Top 27%
Division (F45-49)
#0 / 1813
Top 33%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:45
Rank: #18636
Start → 5K
25:45 | 8:17/mi
10K· 6.21 mi
51:26
Rank: #18471 (+165)
5K → 10K
25:41 | 8:16/mi
15K· 9.32 mi
1:17:02
Rank: #18184 (+287)
10K → 15K
25:36 | 8:14/mi
20K· 12.43 mi
1:42:48
Rank: #17830 (+354)
15K → 20K
25:46 | 8:18/mi
Half· 13.11 mi
1:48:23
Rank: #17789 (+41)
20K → Half
5:35 | 8:11/mi
25K· 15.53 mi
2:08:22
Rank: #17372 (+417)
Half → 25K
19:59 | 8:15/mi
30K· 18.64 mi
2:34:20
Rank: #16710 (+662)
25K → 30K
25:58 | 8:21/mi
20M
2:45:47
Rank: #16437 (+273)
30K → 20M
11:27 | 8:26/mi
21M
2:54:41
Rank: #16204 (+233)
20M → 21M
8:54 | 8:54/mi
35K· 21.75 mi
3:00:46
Rank: #16059 (+145)
21M → 35K
6:05 | 8:08/mi
23M
3:11:13
Rank: #15767 (+292)
35K → 23M
10:27 | 8:21/mi
24M
3:19:24
Rank: #15632 (+135)
23M → 24M
8:11 | 8:11/mi
40K· 24.85 mi
3:26:30
Rank: #15486 (+146)
24M → 40K
7:06 | 8:18/mi
25.2M
3:29:37
Rank: #15426 (+60)
40K → 25.2M
3:07 | 9:02/mi
Finish· 26.22 mi
3:37:40
Rank: #15302 (+124)
25.2M → Finish
8:03 | 7:54/mi

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:48:23
Pace8:16 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:49:17
Pace8:20 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:21:0525:458:1725:45
8:17
-
10K
6.21 mi11:46:4651:268:1725:41
8:16
-0:01
15K
9.32 mi12:12:221:17:028:1625:36
8:14
-0:02
20K
12.43 mi12:38:081:42:488:1625:46
8:18
+0:04
Half
13.11 mi12:43:431:48:238:165:35
8:11
-0:07
25K
15.53 mi13:03:422:08:228:1619:59
8:15
+0:04
30K
18.64 mi13:29:402:34:208:1725:58
8:21
+0:06
20M
20.00 mi13:41:072:45:478:1711:27
8:26
+0:05
21M
21.00 mi13:50:012:54:418:198:54
8:54
+0:28
35K
21.75 mi13:56:063:00:468:196:05
8:08
-0:46
23M
23.00 mi14:06:333:11:138:1910:27
8:21
+0:13
24M
24.00 mi14:14:443:19:248:198:11
8:11
-0:10
40K
24.85 mi14:21:503:26:308:187:06
8:18
+0:07
25.2M
25.20 mi14:24:573:29:378:193:07
9:02
+0:44
Finish
26.22 mi14:33:003:37:408:188:03
7:54
-1:08

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

7:54 /mi

Average Pace

8:18 /mi

Slowest Pace

9:02 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:25:39

94% of race

Time at Steady Pace

12:01

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:18 /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 mi11:21:0525:458:1725:45
8:17
#18636
10K
6.21 mi11:46:4651:268:1725:41
8:16
#18471
15K
9.32 mi12:12:221:17:028:1625:36
8:14
#18184
20K
12.43 mi12:38:081:42:488:1625:46
8:18
#17830
Half
13.11 mi12:43:431:48:238:165:35
8:11
#17789
25K
15.53 mi13:03:422:08:228:1619:59
8:15
#17372
30K
18.64 mi13:29:402:34:208:1725:58
8:21
#16710
20M
20.00 mi13:41:072:45:478:1711:27
8:26
#16437
21M
21.00 mi13:50:012:54:418:198:54
8:54
#16204
35K
21.75 mi13:56:063:00:468:196:05
8:08
#16059
23M
23.00 mi14:06:333:11:138:1910:27
8:21
#15767
24M
24.00 mi14:14:443:19:248:198:11
8:11
#15632
40K
24.85 mi14:21:503:26:308:187:06
8:18
#15486
25.2M
25.20 mi14:24:573:29:378:193:07
9:02
#15426
Finish
26.22 mi14:33:003:37:408:188:03
7:54
#15302
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi186366699669917656(Top 62%)6110(Top 50%)6110(Top 337%)
10K6.21 mi3.10 mi18471+1656597+1026597+10218343(Top 65%)6509(Top 53%)6509(Top 359%)
15K9.32 mi3.11 mi18184+2876437+1606437+16017656(Top 62%)6110(Top 50%)6110(Top 337%)
20K12.43 mi3.11 mi17830+3546239+1986239+19816906(Top 60%)5720(Top 47%)5720(Top 315%)
Half13.11 mi0.68 mi17789+416225+146225+1417194(Top 61%)5859(Top 48%)5859(Top 323%)
25K15.53 mi2.42 mi17372+4175981+2445981+24415579(Top 55%)5063(Top 41%)5063(Top 279%)
30K18.64 mi3.11 mi16710+6625643+3385643+33813894(Top 49%)4310(Top 35%)4310(Top 238%)
20M20.00 mi1.36 mi16437+2735521+1225521+12213349(Top 47%)4173(Top 34%)4173(Top 230%)
21M21.00 mi1.00 mi16204+2335413+1085413+10812964(Top 46%)4107(Top 34%)4107(Top 227%)
35K21.75 mi0.75 mi16059+1455356+575356+5713205(Top 46%)4289(Top 35%)4289(Top 237%)
23M23.00 mi1.25 mi15767+2925235+1215235+12112359(Top 44%)3942(Top 32%)3942(Top 217%)
24M24.00 mi1.00 mi15632+1355172+635172+6312505(Top 44%)4059(Top 33%)4059(Top 224%)
40K24.85 mi0.85 mi15486+1465119+535119+5312219(Top 43%)4041(Top 33%)4041(Top 223%)
25.2M25.20 mi0.35 mi15426+605095+245095+2412101(Top 43%)4042(Top 33%)4042(Top 223%)
Finish26.22 mi1.02 mi15302+1245050+455050+4512212(Top 43%)4049(Top 33%)4049(Top 223%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 62%
×21stories
+97ft-345ft

Overall

17656

Females

6110

F45-49

6110

5K→10K

3.1 - 6.2 mi

Top 65%
×5stories
+79ft-138ft

Overall

18343

Females

6509

F45-49

6509

10K→15K

6.2 - 9.3 mi

Top 62%
×3stories
+67ft-78ft

Overall

17656

Females

6110

F45-49

6110

15K→20K

9.3 - 12.4 mi

Top 60%
×5stories
+106ft-86ft

Overall

16906

Females

5720

F45-49

5720

20K→Half

12.4 - 13.1 mi

Top 61%
×2stories
+19ft-37ft

Overall

17194

Females

5859

F45-49

5859

Half→25K

13.1 - 15.5 mi

Top 55%
×4stories
+66ft-88ft

Overall

15579

Females

5063

F45-49

5063

25K→30K

15.5 - 18.6 mi

Top 49%
×9stories
+181ft-148ft

Overall

13894

Females

4310

F45-49

4310

30K→20M

18.6 - 20.0 mi

Top 47%
×5stories
+64ft-50ft

Overall

13349

Females

4173

F45-49

4173

20M→21M

20.0 - 21.0 mi

Top 46%
×8stories
+106ft-24ft

Overall

12964

Females

4107

F45-49

4107

21M→35K

21.0 - 21.8 mi

Top 46%
×7stories
+17ft-86ft

Overall

13205

Females

4289

F45-49

4289

35K→23M

21.8 - 23.0 mi

Top 44%
×5stories
+23ft-63ft

Overall

12359

Females

3942

F45-49

3942

23M→24M

23.0 - 24.0 mi

Top 44%
×6stories
+12ft-82ft

Overall

12505

Females

4059

F45-49

4059

24M→40K

24.0 - 24.9 mi

Top 43%
×1story
+6ft-20ft

Overall

12219

Females

4041

F45-49

4041

40K→25.2M

24.9 - 25.2 mi

Top 43%
×1story
+13ft-16ft

Overall

12101

Females

4042

F45-49

4042

25.2M→Finish

25.2 - 26.2 mi

Top 43%
×2stories
+22ft-21ft

Overall

12212

Females

4049

F45-49

4049

Passing Analysis

Category:
Athletes Passed
3725
Passed By
391
Net Change
+3334
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18636
5K → 10K356191+165#18636#18471
10K → 15K35366+287#18471#18184
15K → 20K39137+354#18184#17830
20K → Half5514+41#17830#17789
Half → 25K43013+417#17789#17372
25K → 30K6686+662#17372#16710
30K → 20M2818+273#16710#16437
20M → 21M24714+233#16437#16204
21M → 35K1516+145#16204#16059
35K → 23M2953+292#16059#15767
23M → 24M1416+135#15767#15632
24M → 40K15610+146#15632#15486
40K → 25.2M633+60#15486#15426
25.2M → Finish13814+124#15426#15302
TOTALS3725391+3334
📊

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