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BOSTON MARATHON 2023

Birgitta Nilsson

Bib: 27648•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F55-59)
#0 / 815
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
29:21
Rank: #21940
Start → 5K
29:21 | 9:27/mi
10K· 6.21 mi
57:17
Rank: #21472 (+468)
5K → 10K
27:56 | 8:59/mi
15K· 9.32 mi
1:27:33
Rank: #21969 (-497)
10K → 15K
30:16 | 9:45/mi
20K· 12.43 mi
2:00:53
Rank: #22741 (-772)
15K → 20K
33:20 | 10:44/mi
Half· 13.11 mi
2:08:14
Rank: #22879 (-138)
20K → Half
7:21 | 10:46/mi
25K· 15.53 mi
2:35:40
Rank: #23249 (-370)
Half → 25K
27:26 | 11:19/mi
30K· 18.64 mi
3:10:04
Rank: #23236 (+13)
25K → 30K
34:24 | 11:04/mi
20M
3:23:44
Rank: #23053 (+183)
30K → 20M
13:40 | 10:03/mi
21M
3:35:08
Rank: #22977 (+76)
20M → 21M
11:24 | 11:24/mi
35K· 21.75 mi
3:42:21
Rank: #22887 (+90)
21M → 35K
7:13 | 9:39/mi
23M
3:55:32
Rank: #22795 (+92)
35K → 23M
13:11 | 10:32/mi
24M
4:05:26
Rank: #22697 (+98)
23M → 24M
9:54 | 9:54/mi
40K· 24.85 mi
4:14:09
Rank: #22627 (+70)
24M → 40K
8:43 | 10:12/mi
25.2M
4:18:01
Rank: #22602 (+25)
40K → 25.2M
3:52 | 11:13/mi
Finish· 26.22 mi
4:27:44
Rank: #22537 (+65)
25.2M → Finish
9:43 | 9:32/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:08:14
Pace9:47 /mi
2nd Half
Distance13.11 mi
Time2:19:30
Pace10:38 /mi
📊Positive Split: 8.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:47:1129:219:2729:21
9:27
-
10K
6.21 mi12:15:0757:179:1327:56
8:59
-0:28
15K
9.32 mi12:45:231:27:339:2430:16
9:45
+0:46
20K
12.43 mi13:18:432:00:539:4433:20
10:44
+0:59
Half
13.11 mi13:26:042:08:149:477:21
10:46
+0:02
25K
15.53 mi13:53:302:35:4010:0127:26
11:19
+0:33
30K
18.64 mi14:27:543:10:0410:1234:24
11:04
-0:15
20M
20.00 mi14:41:343:23:4410:1113:40
10:03
-1:01
21M
21.00 mi14:52:583:35:0810:1511:24
11:24
+1:21
35K
21.75 mi15:00:113:42:2110:137:13
9:39
-1:45
23M
23.00 mi15:13:223:55:3210:1413:11
10:32
+0:53
24M
24.00 mi15:23:164:05:2610:149:54
9:54
-0:38
40K
24.85 mi15:31:594:14:0910:148:43
10:12
+0:18
25.2M
25.20 mi15:35:514:18:0110:143:52
11:13
+1:01
Finish
26.22 mi15:45:344:27:4410:139:43
9:32
-1:41

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

8:59 /mi

Average Pace

10:13 /mi

Slowest Pace

11:24 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:44:29

39% of race

Time at Steady Pace

45:28

17% of race

Time at Slower Pace

1:57:47

44% of race

Average Pace: 10:13 /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 mi11:47:1129:219:2729:21
9:27
#21940
10K
6.21 mi12:15:0757:179:1327:56
8:59
#21472
15K
9.32 mi12:45:231:27:339:2430:16
9:45
#21969
20K
12.43 mi13:18:432:00:539:4433:20
10:44
#22741
Half
13.11 mi13:26:042:08:149:477:21
10:46
#22879
25K
15.53 mi13:53:302:35:4010:0127:26
11:19
#23249
30K
18.64 mi14:27:543:10:0410:1234:24
11:04
#23236
20M
20.00 mi14:41:343:23:4410:1113:40
10:03
#23053
21M
21.00 mi14:52:583:35:0810:1511:24
11:24
#22977
35K
21.75 mi15:00:113:42:2110:137:13
9:39
#22887
23M
23.00 mi15:13:223:55:3210:1413:11
10:32
#22795
24M
24.00 mi15:23:164:05:2610:149:54
9:54
#22697
40K
24.85 mi15:31:594:14:0910:148:43
10:12
#22627
25.2M
25.20 mi15:35:514:18:0110:143:52
11:13
#22602
Finish
26.22 mi15:45:344:27:4410:139:43
9:32
#22537
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi219408855885522914(Top 86%)9294(Top 81%)9294(Top 1140%)
10K6.21 mi3.10 mi21472+4688570+2858570+28520853(Top 78%)8187(Top 72%)8187(Top 1005%)
15K9.32 mi3.11 mi21969-4978821-2518821-25122914(Top 86%)9294(Top 81%)9294(Top 1140%)
20K12.43 mi3.11 mi22741-7729208-3879208-38724218(Top 91%)10042(Top 88%)10042(Top 1232%)
Half13.11 mi0.68 mi22879-1389280-729280-7224635(Top 93%)10279(Top 90%)10279(Top 1261%)
25K15.53 mi2.42 mi23249-3709481-2019481-20124428(Top 92%)10189(Top 89%)10189(Top 1250%)
30K18.64 mi3.11 mi23236+139502-219502-2123204(Top 87%)9568(Top 84%)9568(Top 1174%)
20M20.00 mi1.36 mi23053+1839425+779425+7720665(Top 78%)8230(Top 72%)8230(Top 1010%)
21M21.00 mi1.00 mi22977+769393+329393+3221703(Top 82%)8834(Top 77%)8834(Top 1084%)
35K21.75 mi0.75 mi22887+909354+399354+3920342(Top 76%)8142(Top 71%)8142(Top 999%)
23M23.00 mi1.25 mi22795+929321+339321+3321403(Top 80%)8743(Top 77%)8743(Top 1073%)
24M24.00 mi1.00 mi22697+989271+509271+5020531(Top 77%)8285(Top 73%)8285(Top 1017%)
40K24.85 mi0.85 mi22627+709245+269245+2620494(Top 77%)8335(Top 73%)8335(Top 1023%)
25.2M25.20 mi0.35 mi22602+259232+139232+1320982(Top 79%)8588(Top 75%)8588(Top 1054%)
Finish26.22 mi1.02 mi22537+659210+229210+2220274(Top 76%)8167(Top 71%)8167(Top 1002%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 86%
×21stories
+97ft-345ft

Overall

22914

Females

9294

F55-59

9294

5K→10K

3.1 - 6.2 mi

Top 78%
×5stories
+79ft-138ft

Overall

20853

Females

8187

F55-59

8187

10K→15K

6.2 - 9.3 mi

Top 86%
×3stories
+67ft-78ft

Overall

22914

Females

9294

F55-59

9294

15K→20K

9.3 - 12.4 mi

Top 91%
×5stories
+106ft-86ft

Overall

24218

Females

10042

F55-59

10042

20K→Half

12.4 - 13.1 mi

Top 93%
×2stories
+19ft-37ft

Overall

24635

Females

10279

F55-59

10279

Half→25K

13.1 - 15.5 mi

Top 92%
×4stories
+66ft-88ft

Overall

24428

Females

10189

F55-59

10189

25K→30K

15.5 - 18.6 mi

Top 87%
×9stories
+181ft-148ft

Overall

23204

Females

9568

F55-59

9568

30K→20M

18.6 - 20.0 mi

Top 78%
×5stories
+64ft-50ft

Overall

20665

Females

8230

F55-59

8230

20M→21M

20.0 - 21.0 mi

Top 82%
×8stories
+106ft-24ft

Overall

21703

Females

8834

F55-59

8834

21M→35K

21.0 - 21.8 mi

Top 76%
×7stories
+17ft-86ft

Overall

20342

Females

8142

F55-59

8142

35K→23M

21.8 - 23.0 mi

Top 80%
×5stories
+23ft-63ft

Overall

21403

Females

8743

F55-59

8743

23M→24M

23.0 - 24.0 mi

Top 77%
×6stories
+12ft-82ft

Overall

20531

Females

8285

F55-59

8285

24M→40K

24.0 - 24.9 mi

Top 77%
×1story
+6ft-20ft

Overall

20494

Females

8335

F55-59

8335

40K→25.2M

24.9 - 25.2 mi

Top 79%
×1story
+13ft-16ft

Overall

20982

Females

8588

F55-59

8588

25.2M→Finish

25.2 - 26.2 mi

Top 76%
×2stories
+22ft-21ft

Overall

20274

Females

8167

F55-59

8167

Passing Analysis

Category:
Athletes Passed
1522
Passed By
2119
Net Change
-597
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21940
5K → 10K55991+468#21940#21472
10K → 15K45542-497#21472#21969
15K → 20K17789-772#21969#22741
20K → Half4142-138#22741#22879
Half → 25K25395-370#22879#23249
25K → 30K128115+13#23249#23236
30K → 20M1852+183#23236#23053
20M → 21M8711+76#23053#22977
21M → 35K911+90#22977#22887
35K → 23M10513+92#22887#22795
23M → 24M991+98#22795#22697
24M → 40K744+70#22697#22627
40K → 25.2M294+25#22627#22602
25.2M → Finish749+65#22602#22537
TOTALS15222119-597
📊

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