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BOSTON MARATHON 2023

Karen Ostergaard

Bib: 11934•F

NC

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 43%
Gender (Female)
#0 / 11423
Top 25%
Masters (Masters Women)
#0 / 6539
Top 12%
Division (F45-49)
#0 / 1817
Top 12%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ 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
7:17/mi
22:37
↑ 97↓ 3451.5%
10K· 6.21 mi
7:23/mi
45:32
↑ 79↓ 1380.4%
15K· 9.32 mi
7:32/mi
1:08:57
↑ 67↓ 78
20K· 12.43 mi
7:45/mi
1:33:03
↑ 106↓ 860.1%
Half· 13.11 mi
7:50/mi
1:38:24
↑ 19↓ 370.5%
25K· 15.53 mi
8:04/mi
1:57:57
↑ 66↓ 880.2%
30K· 18.64 mi
8:20/mi
2:23:50
↑ 181↓ 1480.2%
20M
8:24/mi
2:35:15
↑ 64↓ 500.2%
21M
8:44/mi
2:43:59
↑ 106↓ 241.6%
35K· 21.75 mi
7:53/mi
2:49:53
↑ 17↓ 861.7%
23M
8:22/mi
3:00:21
↑ 23↓ 630.6%
24M
8:19/mi
3:08:40
↓ 821.3%
40K· 24.85 mi
8:18/mi
3:15:46
↓ 200.3%
25.2M
8:59/mi
3:18:52
↑ 13↓ 160.2%
Finish· 26.22 mi
8:19/mi
3:27:21
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:24
Pace7:30 /mi
2nd Half
Distance13.11 mi
Time1:48:57
Pace8:19 /mi
📊Positive Split: 10.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:4322:377:1722:37
7:17
-
10K
6.21 mi11:12:3845:327:2022:55
7:23
+0:06
15K
9.32 mi11:36:031:08:577:2423:25
7:32
+0:09
20K
12.43 mi12:00:091:33:037:2924:06
7:45
+0:13
Half
13.11 mi12:05:301:38:247:305:21
7:50
+0:05
25K
15.53 mi12:25:031:57:577:3619:33
8:04
+0:14
30K
18.64 mi12:50:562:23:507:4325:53
8:20
+0:16
20M
20.00 mi13:02:212:35:157:4611:25
8:24
+0:04
21M
21.00 mi13:11:052:43:597:498:44
8:44
+0:20
35K
21.75 mi13:16:592:49:537:495:54
7:53
-0:51
23M
23.00 mi13:27:273:00:217:5010:28
8:22
+0:29
24M
24.00 mi13:35:463:08:407:528:19
8:19
-0:03
40K
24.85 mi13:42:523:15:467:537:06
8:18
-0:01
25.2M
25.20 mi13:45:583:18:527:533:06
8:59
+0:41
Finish
26.22 mi13:54:273:27:217:558:29
8:19
-0:40

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

7:17 /mi

Average Pace

7:55 /mi

Slowest Pace

8:59 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:44:18

50% of race

Time at Steady Pace

1:31:13

44% of race

Time at Slower Pace

11:50

6% of race

Average Pace: 7:54 /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 mi10:49:4322:377:1722:37
7:17
#8003
10K
6.21 mi11:12:3845:327:2022:55
7:23
#8648
15K
9.32 mi11:36:031:08:577:2423:25
7:32
#9171
20K
12.43 mi12:00:091:33:037:2924:06
7:45
#9717
Half
13.11 mi12:05:301:38:247:305:21
7:50
#9906
25K
15.53 mi12:25:031:57:577:3619:33
8:04
#10434
30K
18.64 mi12:50:562:23:507:4325:53
8:20
#10892
20M
20.00 mi13:02:212:35:157:4611:25
8:24
#11046
21M
21.00 mi13:11:052:43:597:498:44
8:44
#11074
35K
21.75 mi13:16:592:49:537:495:54
7:53
#11088
23M
23.00 mi13:27:273:00:217:5010:28
8:22
#11139
24M
24.00 mi13:35:463:08:407:528:19
8:19
#11259
40K
24.85 mi13:42:523:15:467:537:06
8:18
#11266
25.2M
25.20 mi13:45:583:18:527:533:06
8:59
#11291
Finish
26.22 mi13:54:273:27:217:558:29
8:19
#11416
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi80031016101610503(Top 39%)2079(Top 18%)2079(Top 114%)
10K6.21 mi3.10 mi8648-6451273-2571273-2579441(Top 35%)1607(Top 14%)1607(Top 88%)
15K9.32 mi3.11 mi9171-5231488-2151488-21510503(Top 39%)2079(Top 18%)2079(Top 114%)
20K12.43 mi3.11 mi9717-5461713-2251713-22511385(Top 43%)2623(Top 23%)2623(Top 144%)
Half13.11 mi0.68 mi9906-1891796-831796-8313116(Top 49%)3550(Top 31%)3550(Top 195%)
25K15.53 mi2.42 mi10434-5282064-2682064-26813247(Top 50%)3768(Top 33%)3768(Top 207%)
30K18.64 mi3.11 mi10892-4582345-2812345-28113221(Top 50%)3874(Top 34%)3874(Top 213%)
20M20.00 mi1.36 mi11046-1542462-1172462-11713038(Top 49%)3874(Top 34%)3874(Top 213%)
21M21.00 mi1.00 mi11074-282498-362498-3611892(Top 45%)3339(Top 29%)3339(Top 184%)
35K21.75 mi0.75 mi11088-142513-152513-1511331(Top 43%)3038(Top 27%)3038(Top 167%)
23M23.00 mi1.25 mi11139-512569-562569-5612311(Top 46%)3689(Top 32%)3689(Top 203%)
24M24.00 mi1.00 mi11259-1202655-862655-8613330(Top 50%)4288(Top 38%)4288(Top 236%)
40K24.85 mi0.85 mi11266-72691-362691-3612085(Top 45%)3710(Top 32%)3710(Top 204%)
25.2M25.20 mi0.35 mi11291-252714-232714-2312490(Top 47%)3949(Top 35%)3949(Top 217%)
Finish26.22 mi1.02 mi11416-1252802-882802-8814260(Top 54%)4872(Top 43%)4872(Top 268%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 39%
×21story building
+97ft-345ft

Overall

10503

Females

2079

F45-49

2079

5K→10K

3.1 - 6.2 mi

Top 35%
×5story building
+79ft-138ft

Overall

9441

Females

1607

F45-49

1607

10K→15K

6.2 - 9.3 mi

Top 39%
×3story building
+67ft-78ft

Overall

10503

Females

2079

F45-49

2079

15K→20K

9.3 - 12.4 mi

Top 43%
×5story building
+106ft-86ft

Overall

11385

Females

2623

F45-49

2623

20K→Half

12.4 - 13.1 mi

Top 49%
×2story building
+19ft-37ft

Overall

13116

Females

3550

F45-49

3550

Half→25K

13.1 - 15.5 mi

Top 50%
×4story building
+66ft-88ft

Overall

13247

Females

3768

F45-49

3768

25K→30K

15.5 - 18.6 mi

Top 50%
×9story building
+181ft-148ft

Overall

13221

Females

3874

F45-49

3874

30K→20M

18.6 - 20.0 mi

Top 49%
×5story building
+64ft-50ft

Overall

13038

Females

3874

F45-49

3874

20M→21M

20.0 - 21.0 mi

Top 45%
×8story building
+106ft-24ft

Overall

11892

Females

3339

F45-49

3339

21M→35K

21.0 - 21.8 mi

Top 43%
×7story building
+17ft-86ft

Overall

11331

Females

3038

F45-49

3038

35K→23M

21.8 - 23.0 mi

Top 46%
×5story building
+23ft-63ft

Overall

12311

Females

3689

F45-49

3689

23M→24M

23.0 - 24.0 mi

Top 50%
×6story building
+12ft-82ft

Overall

13330

Females

4288

F45-49

4288

24M→40K

24.0 - 24.9 mi

Top 45%
×1story
+6ft-20ft

Overall

12085

Females

3710

F45-49

3710

40K→25.2M

24.9 - 25.2 mi

Top 47%
×1story
+13ft-16ft

Overall

12490

Females

3949

F45-49

3949

25.2M→Finish

25.2 - 26.2 mi

Top 54%
×2story building
+22ft-21ft

Overall

14260

Females

4872

F45-49

4872

Passing Analysis

Category:
Athletes Passed
606*
Passed By
4017
Net Change
-3413
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8003
5K → 10K48693-645#8003#8648
10K → 15K39562-523#8648#9171
15K → 20K36582-546#9171#9717
20K → Half2191-189#9717#9906
Half → 25K29555-528#9906#10434
25K → 30K70528-458#10434#10892
30K → 20M45*199-154#10892#11046
20M → 21M6391-28#11046#11074
21M → 35K3953-14#11074#11088
35K → 23M69120-51#11088#11139
23M → 24M39159-120#11139#11259
24M → 40K5764-7#11259#11266
40K → 25.2M3156-25#11266#11291
25.2M → Finish39164-125#11291#11416
TOTALS606*4017-3413

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

📊

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