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BOSTON MARATHON 2023

Kathryn Ergen

Bib: 23419•F

MN

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
Top 31%
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
8:53/mi
27:36
↑ 97↓ 3451.5%
10K· 6.21 mi
8:41/mi
54:36
↑ 79↓ 1380.4%
15K· 9.32 mi
8:44/mi
1:21:43
↑ 67↓ 78
20K· 12.43 mi
8:52/mi
1:49:16
↑ 106↓ 860.1%
Half· 13.11 mi
8:48/mi
1:55:16
↑ 19↓ 370.5%
25K· 15.53 mi
8:53/mi
2:16:48
↑ 66↓ 880.2%
30K· 18.64 mi
9:03/mi
2:44:56
↑ 181↓ 1480.2%
20M
9:03/mi
2:57:14
↑ 64↓ 500.2%
21M
9:38/mi
3:06:52
↑ 106↓ 241.6%
35K· 21.75 mi
8:45/mi
3:13:25
↑ 17↓ 861.7%
23M
9:06/mi
3:24:49
↑ 23↓ 630.6%
24M
8:49/mi
3:33:38
↓ 821.3%
40K· 24.85 mi
8:58/mi
3:41:18
↓ 200.3%
25.2M
9:46/mi
3:44:40
↑ 13↓ 160.2%
Finish· 26.22 mi
8:36/mi
3:53:26
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:55:16
Pace8:48 /mi
2nd Half
Distance13.11 mi
Time1:58:10
Pace9:01 /mi
📊Positive Split: 2.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:23:0227:368:5327:36
8:53
-
10K
6.21 mi11:50:0254:368:4727:00
8:41
-0:12
15K
9.32 mi12:17:091:21:438:4627:07
8:44
+0:03
20K
12.43 mi12:44:421:49:168:4827:33
8:52
+0:08
Half
13.11 mi12:50:421:55:168:486:00
8:48
-0:04
25K
15.53 mi13:12:142:16:488:4821:32
8:53
+0:05
30K
18.64 mi13:40:222:44:568:5128:08
9:03
+0:10
20M
20.00 mi13:52:402:57:148:5212:18
9:03
0:00
21M
21.00 mi14:02:183:06:528:549:38
9:38
+0:35
35K
21.75 mi14:08:513:13:258:546:33
8:45
-0:53
23M
23.00 mi14:20:153:24:498:5411:24
9:06
+0:21
24M
24.00 mi14:29:043:33:388:548:49
8:49
-0:17
40K
24.85 mi14:36:443:41:188:547:40
8:58
+0:09
25.2M
25.20 mi14:40:063:44:408:553:22
9:46
+0:48
Finish
26.22 mi14:48:523:53:268:558:46
8:36
-1:10

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

8:36 /mi

Average Pace

8:55 /mi

Slowest Pace

9:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:40:26

94% of race

Time at Steady Pace

13:00

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:54 /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 mi11:23:0227:368:5327:36
8:53
#19914
10K
6.21 mi11:50:0254:368:4727:00
8:41
#19613
15K
9.32 mi12:17:091:21:438:4627:07
8:44
#19434
20K
12.43 mi12:44:421:49:168:4827:33
8:52
#19291
Half
13.11 mi12:50:421:55:168:486:00
8:48
#19276
25K
15.53 mi13:12:142:16:488:4821:32
8:53
#19120
30K
18.64 mi13:40:222:44:568:5128:08
9:03
#18836
20M
20.00 mi13:52:402:57:148:5212:18
9:03
#18682
21M
21.00 mi14:02:183:06:528:549:38
9:38
#18546
35K
21.75 mi14:08:513:13:258:546:33
8:45
#18453
23M
23.00 mi14:20:153:24:498:5411:24
9:06
#18332
24M
24.00 mi14:29:043:33:388:548:49
8:49
#18243
40K
24.85 mi14:36:443:41:188:547:40
8:58
#18167
25.2M
25.20 mi14:40:063:44:408:553:22
9:46
#18152
Finish
26.22 mi14:48:523:53:268:558:46
8:36
#18073
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi199147753775319132(Top 72%)7180(Top 63%)7180(Top 881%)
10K6.21 mi3.10 mi19613+3017540+2137540+21319378(Top 73%)7305(Top 64%)7305(Top 896%)
15K9.32 mi3.11 mi19434+1797413+1277413+12719132(Top 72%)7180(Top 63%)7180(Top 881%)
20K12.43 mi3.11 mi19291+1437298+1157298+11519053(Top 72%)7118(Top 62%)7118(Top 873%)
Half13.11 mi0.68 mi19276+157286+127286+1219470(Top 73%)7348(Top 64%)7348(Top 902%)
25K15.53 mi2.42 mi19120+1567189+977189+9718370(Top 69%)6765(Top 59%)6765(Top 830%)
30K18.64 mi3.11 mi18836+2847048+1417048+14117477(Top 66%)6342(Top 56%)6342(Top 778%)
20M20.00 mi1.36 mi18682+1546971+776971+7716830(Top 63%)6055(Top 53%)6055(Top 743%)
21M21.00 mi1.00 mi18546+1366901+706901+7016607(Top 62%)5977(Top 52%)5977(Top 733%)
35K21.75 mi0.75 mi18453+936861+406861+4016768(Top 63%)6156(Top 54%)6156(Top 755%)
23M23.00 mi1.25 mi18332+1216809+526809+5216589(Top 62%)6078(Top 53%)6078(Top 746%)
24M24.00 mi1.00 mi18243+896764+456764+4516334(Top 61%)5997(Top 52%)5997(Top 736%)
40K24.85 mi0.85 mi18167+766734+306734+3016006(Top 60%)5864(Top 51%)5864(Top 720%)
25.2M25.20 mi0.35 mi18152+156732+26732+216433(Top 62%)6127(Top 54%)6127(Top 752%)
Finish26.22 mi1.02 mi18073+796695+376695+3716036(Top 60%)5837(Top 51%)5837(Top 716%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 72%
×21story building
+97ft-345ft

Overall

19132

Females

7180

F55-59

7180

5K→10K

3.1 - 6.2 mi

Top 73%
×5story building
+79ft-138ft

Overall

19378

Females

7305

F55-59

7305

10K→15K

6.2 - 9.3 mi

Top 72%
×3story building
+67ft-78ft

Overall

19132

Females

7180

F55-59

7180

15K→20K

9.3 - 12.4 mi

Top 72%
×5story building
+106ft-86ft

Overall

19053

Females

7118

F55-59

7118

20K→Half

12.4 - 13.1 mi

Top 73%
×2story building
+19ft-37ft

Overall

19470

Females

7348

F55-59

7348

Half→25K

13.1 - 15.5 mi

Top 69%
×4story building
+66ft-88ft

Overall

18370

Females

6765

F55-59

6765

25K→30K

15.5 - 18.6 mi

Top 66%
×9story building
+181ft-148ft

Overall

17477

Females

6342

F55-59

6342

30K→20M

18.6 - 20.0 mi

Top 63%
×5story building
+64ft-50ft

Overall

16830

Females

6055

F55-59

6055

20M→21M

20.0 - 21.0 mi

Top 62%
×8story building
+106ft-24ft

Overall

16607

Females

5977

F55-59

5977

21M→35K

21.0 - 21.8 mi

Top 63%
×7story building
+17ft-86ft

Overall

16768

Females

6156

F55-59

6156

35K→23M

21.8 - 23.0 mi

Top 62%
×5story building
+23ft-63ft

Overall

16589

Females

6078

F55-59

6078

23M→24M

23.0 - 24.0 mi

Top 61%
×6story building
+12ft-82ft

Overall

16334

Females

5997

F55-59

5997

24M→40K

24.0 - 24.9 mi

Top 60%
×1story
+6ft-20ft

Overall

16006

Females

5864

F55-59

5864

40K→25.2M

24.9 - 25.2 mi

Top 62%
×1story
+13ft-16ft

Overall

16433

Females

6127

F55-59

6127

25.2M→Finish

25.2 - 26.2 mi

Top 60%
×2story building
+22ft-21ft

Overall

16036

Females

5837

F55-59

5837

Passing Analysis

Category:
Athletes Passed
2460
Passed By
619
Net Change
+1841
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19914
5K → 10K477176+301#19914#19613
10K → 15K290111+179#19613#19434
15K → 20K22885+143#19434#19291
20K → Half2914+15#19291#19276
Half → 25K19842+156#19276#19120
25K → 30K32844+284#19120#18836
30K → 20M17723+154#18836#18682
20M → 21M16125+136#18682#18546
21M → 35K1018+93#18546#18453
35K → 23M14524+121#18453#18332
23M → 24M10314+89#18332#18243
24M → 40K9317+76#18243#18167
40K → 25.2M2510+15#18167#18152
25.2M → Finish10526+79#18152#18073
TOTALS2460619+1841
📊

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