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BOSTON MARATHON 2023

Karin Lee

Bib: 18457•F

NY

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 44%
Masters (Masters Women)
#0 / 6539
Top 32%
Division (F40-44)
#0 / 1878
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
8:17/mi
25:43
↑ 97↓ 3451.5%
10K· 6.21 mi
8:14/mi
51:19
↑ 79↓ 1380.4%
15K· 9.32 mi
8:20/mi
1:17:11
↑ 67↓ 78
20K· 12.43 mi
8:24/mi
1:43:18
↑ 106↓ 860.1%
Half· 13.11 mi
8:10/mi
1:48:52
↑ 19↓ 370.5%
25K· 15.53 mi
8:24/mi
2:09:15
↑ 66↓ 880.2%
30K· 18.64 mi
8:44/mi
2:36:22
↑ 181↓ 1480.2%
20M
8:48/mi
2:48:19
↑ 64↓ 500.2%
21M
8:57/mi
2:57:16
↑ 106↓ 241.6%
35K· 21.75 mi
8:15/mi
3:03:26
↑ 17↓ 861.7%
23M
8:42/mi
3:14:19
↑ 23↓ 630.6%
24M
8:19/mi
3:22:38
↓ 821.3%
40K· 24.85 mi
8:37/mi
3:30:00
↓ 200.3%
25.2M
8:51/mi
3:33:03
↑ 13↓ 160.2%
Finish· 26.22 mi
8:00/mi
3:41:12
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:48:52
Pace8:18 /mi
2nd Half
Distance13.11 mi
Time1:52:20
Pace8:34 /mi
📊Positive Split: 3.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:0325:438:1725:43
8:17
-
10K
6.21 mi11:42:3951:198:1625:36
8:14
-0:03
15K
9.32 mi12:08:311:17:118:1725:52
8:20
+0:06
20K
12.43 mi12:34:381:43:188:1926:07
8:24
+0:04
Half
13.11 mi12:40:121:48:528:185:34
8:10
-0:14
25K
15.53 mi13:00:352:09:158:1920:23
8:24
+0:14
30K
18.64 mi13:27:422:36:228:2327:07
8:44
+0:20
20M
20.00 mi13:39:392:48:198:2511:57
8:48
+0:04
21M
21.00 mi13:48:362:57:168:268:57
8:57
+0:09
35K
21.75 mi13:54:463:03:268:266:10
8:15
-0:42
23M
23.00 mi14:05:393:14:198:2710:53
8:42
+0:27
24M
24.00 mi14:13:583:22:388:278:19
8:19
-0:23
40K
24.85 mi14:21:203:30:008:277:22
8:37
+0:18
25.2M
25.20 mi14:24:233:33:038:273:03
8:51
+0:14
Finish
26.22 mi14:32:323:41:128:278:09
8:00
-0:51

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

8:00 /mi

Average Pace

8:27 /mi

Slowest Pace

8:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:29:12

95% of race

Time at Steady Pace

12:00

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:26 /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 mi11:17:0325:438:1725:43
8:17
#16001
10K
6.21 mi11:42:3951:198:1625:36
8:14
#16233
15K
9.32 mi12:08:311:17:118:1725:52
8:20
#16375
20K
12.43 mi12:34:381:43:188:1926:07
8:24
#16378
Half
13.11 mi12:40:121:48:528:185:34
8:10
#16317
25K
15.53 mi13:00:352:09:158:1920:23
8:24
#16178
30K
18.64 mi13:27:422:36:228:2327:07
8:44
#16071
20M
20.00 mi13:39:392:48:198:2511:57
8:48
#16009
21M
21.00 mi13:48:362:57:168:268:57
8:57
#15807
35K
21.75 mi13:54:463:03:268:266:10
8:15
#15716
23M
23.00 mi14:05:393:14:198:2710:53
8:42
#15616
24M
24.00 mi14:13:583:22:388:278:19
8:19
#15508
40K
24.85 mi14:21:203:30:008:277:22
8:37
#15458
25.2M
25.20 mi14:24:233:33:038:273:03
8:51
#15370
Finish
26.22 mi14:32:323:41:128:278:09
8:00
#15237
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi160015283528316700(Top 63%)5728(Top 50%)5728(Top 305%)
10K6.21 mi3.10 mi16233-2325415-1325415-13216528(Top 62%)5593(Top 49%)5593(Top 298%)
15K9.32 mi3.11 mi16375-1425511-965511-9616700(Top 63%)5728(Top 50%)5728(Top 305%)
20K12.43 mi3.11 mi16378-35540-295540-2916283(Top 61%)5519(Top 48%)5519(Top 294%)
Half13.11 mi0.68 mi16317+615501+395501+3915541(Top 58%)5013(Top 44%)5013(Top 267%)
25K15.53 mi2.42 mi16178+1395442+595442+5915634(Top 59%)5224(Top 46%)5224(Top 278%)
30K18.64 mi3.11 mi16071+1075417+255417+2515662(Top 59%)5306(Top 46%)5306(Top 283%)
20M20.00 mi1.36 mi16009+625396+215396+2115408(Top 58%)5218(Top 46%)5218(Top 278%)
21M21.00 mi1.00 mi15807+2025303+935303+9313156(Top 49%)4037(Top 35%)4037(Top 215%)
35K21.75 mi0.75 mi15716+915263+405263+4013802(Top 52%)4465(Top 39%)4465(Top 238%)
23M23.00 mi1.25 mi15616+1005235+285235+2814353(Top 54%)4826(Top 42%)4826(Top 257%)
24M24.00 mi1.00 mi15508+1085183+525183+5213363(Top 50%)4321(Top 38%)4321(Top 230%)
40K24.85 mi0.85 mi15458+505168+155168+1514081(Top 53%)4792(Top 42%)4792(Top 255%)
25.2M25.20 mi0.35 mi15370+885118+505118+5011721(Top 44%)3617(Top 32%)3617(Top 193%)
Finish26.22 mi1.02 mi15237+1335044+745044+7412169(Top 46%)3798(Top 33%)3798(Top 202%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 63%
×21story building
+97ft-345ft

Overall

16700

Females

5728

F40-44

5728

5K→10K

3.1 - 6.2 mi

Top 62%
×5story building
+79ft-138ft

Overall

16528

Females

5593

F40-44

5593

10K→15K

6.2 - 9.3 mi

Top 63%
×3story building
+67ft-78ft

Overall

16700

Females

5728

F40-44

5728

15K→20K

9.3 - 12.4 mi

Top 61%
×5story building
+106ft-86ft

Overall

16283

Females

5519

F40-44

5519

20K→Half

12.4 - 13.1 mi

Top 58%
×2story building
+19ft-37ft

Overall

15541

Females

5013

F40-44

5013

Half→25K

13.1 - 15.5 mi

Top 59%
×4story building
+66ft-88ft

Overall

15634

Females

5224

F40-44

5224

25K→30K

15.5 - 18.6 mi

Top 59%
×9story building
+181ft-148ft

Overall

15662

Females

5306

F40-44

5306

30K→20M

18.6 - 20.0 mi

Top 58%
×5story building
+64ft-50ft

Overall

15408

Females

5218

F40-44

5218

20M→21M

20.0 - 21.0 mi

Top 49%
×8story building
+106ft-24ft

Overall

13156

Females

4037

F40-44

4037

21M→35K

21.0 - 21.8 mi

Top 52%
×7story building
+17ft-86ft

Overall

13802

Females

4465

F40-44

4465

35K→23M

21.8 - 23.0 mi

Top 54%
×5story building
+23ft-63ft

Overall

14353

Females

4826

F40-44

4826

23M→24M

23.0 - 24.0 mi

Top 50%
×6story building
+12ft-82ft

Overall

13363

Females

4321

F40-44

4321

24M→40K

24.0 - 24.9 mi

Top 53%
×1story
+6ft-20ft

Overall

14081

Females

4792

F40-44

4792

40K→25.2M

24.9 - 25.2 mi

Top 44%
×1story
+13ft-16ft

Overall

11721

Females

3617

F40-44

3617

25.2M→Finish

25.2 - 26.2 mi

Top 46%
×2story building
+22ft-21ft

Overall

12169

Females

3798

F40-44

3798

Passing Analysis

Category:
Athletes Passed
2012
Passed By
1248
Net Change
+764
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16001
5K → 10K201433-232#16001#16233
10K → 15K135277-142#16233#16375
15K → 20K169172-3#16375#16378
20K → Half7413+61#16378#16317
Half → 25K21576+139#16317#16178
25K → 30K229122+107#16178#16071
30K → 20M10846+62#16071#16009
20M → 21M2108+202#16009#15807
21M → 35K1009+91#15807#15716
35K → 23M12626+100#15716#15616
23M → 24M12517+108#15616#15508
24M → 40K7929+50#15508#15458
40K → 25.2M880+88#15458#15370
25.2M → Finish15320+133#15370#15237
TOTALS20121248+764
📊

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