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BOSTON MARATHON 2023

Erin Jeffers

Bib: 15501•F

TX

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0:00
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Overall
#0 / 26622
Top 37%
Gender (Female)
#0 / 11423
Top 17%
Division (F18-39)
#0 / 4884
Top 31%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:32
Rank: #10311
Start → 5K
23:32 | 7:34/mi
10K· 6.21 mi
46:46
Rank: #10283 (+28)
5K → 10K
23:14 | 7:29/mi
15K· 9.32 mi
1:10:12
Rank: #10349 (-66)
10K → 15K
23:26 | 7:33/mi
20K· 12.43 mi
1:33:49
Rank: #10274 (+75)
15K → 20K
23:37 | 7:36/mi
Half· 13.11 mi
1:38:57
Rank: #10273 (+1)
20K → Half
5:08 | 7:31/mi
25K· 15.53 mi
1:57:31
Rank: #10189 (+84)
Half → 25K
18:34 | 7:39/mi
30K· 18.64 mi
2:21:52
Rank: #10051 (+138)
25K → 30K
24:21 | 7:50/mi
20M
2:32:27
Rank: #9923 (+128)
30K → 20M
10:35 | 7:47/mi
21M
2:40:59
Rank: #9946 (-23)
20M → 21M
8:32 | 8:32/mi
35K· 21.75 mi
2:46:48
Rank: #9943 (+3)
21M → 35K
5:49 | 7:46/mi
23M
2:56:42
Rank: #9873 (+70)
35K → 23M
9:54 | 7:54/mi
24M
3:04:29
Rank: #9826 (+47)
23M → 24M
7:47 | 7:47/mi
40K· 24.85 mi
3:11:14
Rank: #9790 (+36)
24M → 40K
6:45 | 7:54/mi
25.2M
3:14:09
Rank: #9765 (+25)
40K → 25.2M
2:55 | 8:27/mi
Finish· 26.22 mi
3:22:05
Rank: #9755 (+10)
25.2M → Finish
7:56 | 7:47/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:57
Pace7:33 /mi
2nd Half
Distance13.11 mi
Time1:43:08
Pace7:52 /mi
📊Positive Split: 4.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:54:3223:327:3423:32
7:34
-
10K
6.21 mi11:17:4646:467:3223:14
7:29
-0:05
15K
9.32 mi11:41:121:10:127:3223:26
7:33
+0:04
20K
12.43 mi12:04:491:33:497:3323:37
7:36
+0:03
Half
13.11 mi12:09:571:38:577:335:08
7:31
-0:05
25K
15.53 mi12:28:311:57:317:3418:34
7:39
+0:08
30K
18.64 mi12:52:522:21:527:3724:21
7:50
+0:11
20M
20.00 mi13:03:272:32:277:3710:35
7:47
-0:03
21M
21.00 mi13:11:592:40:597:408:32
8:32
+0:45
35K
21.75 mi13:17:482:46:487:405:49
7:46
-0:46
23M
23.00 mi13:27:422:56:427:419:54
7:54
+0:08
24M
24.00 mi13:35:293:04:297:417:47
7:47
-0:07
40K
24.85 mi13:42:143:11:147:426:45
7:54
+0:07
25.2M
25.20 mi13:45:093:14:097:422:55
8:27
+0:33
Finish
26.22 mi13:53:053:22:057:437:56
7:47
-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

7:29 /mi

Average Pace

7:43 /mi

Slowest Pace

8:32 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:10:38

94% of race

Time at Steady Pace

11:27

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:42 /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 mi10:54:3223:327:3423:32
7:34
#10311
10K
6.21 mi11:17:4646:467:3223:14
7:29
#10283
15K
9.32 mi11:41:121:10:127:3223:26
7:33
#10349
20K
12.43 mi12:04:491:33:497:3323:37
7:36
#10274
Half
13.11 mi12:09:571:38:577:335:08
7:31
#10273
25K
15.53 mi12:28:311:57:317:3418:34
7:39
#10189
30K
18.64 mi12:52:522:21:527:3724:21
7:50
#10051
20M
20.00 mi13:03:272:32:277:3710:35
7:47
#9923
21M
21.00 mi13:11:592:40:597:408:32
8:32
#9946
35K
21.75 mi13:17:482:46:487:405:49
7:46
#9943
23M
23.00 mi13:27:422:56:427:419:54
7:54
#9873
24M
24.00 mi13:35:293:04:297:417:47
7:47
#9826
40K
24.85 mi13:42:143:11:147:426:45
7:54
#9790
25.2M
25.20 mi13:45:093:14:097:422:55
8:27
#9765
Finish
26.22 mi13:53:053:22:057:437:56
7:47
#9755
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi103112003200310537(Top 40%)2100(Top 18%)2100(Top 43%)
10K6.21 mi3.10 mi10283+281968+351968+3510285(Top 39%)1948(Top 17%)1948(Top 40%)
15K9.32 mi3.11 mi10349-661984-161984-1610537(Top 40%)2100(Top 18%)2100(Top 43%)
20K12.43 mi3.11 mi10274+751963+211963+2110120(Top 38%)1976(Top 17%)1976(Top 40%)
Half13.11 mi0.68 mi10273+11960+31960+310456(Top 39%)2111(Top 18%)2111(Top 43%)
25K15.53 mi2.42 mi10189+841946+141946+149985(Top 38%)1997(Top 17%)1997(Top 41%)
30K18.64 mi3.11 mi10051+1381915+311915+319653(Top 36%)1999(Top 17%)1999(Top 41%)
20M20.00 mi1.36 mi9923+1281887+281887+288799(Top 33%)1719(Top 15%)1719(Top 35%)
21M21.00 mi1.00 mi9946-231924-371924-3710683(Top 40%)2709(Top 24%)2709(Top 55%)
35K21.75 mi0.75 mi9943+31940-161940-1610493(Top 39%)2593(Top 23%)2593(Top 53%)
23M23.00 mi1.25 mi9873+701936+41936+49140(Top 34%)2103(Top 18%)2103(Top 43%)
24M24.00 mi1.00 mi9826+471949-131949-139673(Top 36%)2422(Top 21%)2422(Top 50%)
40K24.85 mi0.85 mi9790+361964-151964-159334(Top 35%)2316(Top 20%)2316(Top 47%)
25.2M25.20 mi0.35 mi9765+251962+21962+29300(Top 35%)2359(Top 21%)2359(Top 48%)
Finish26.22 mi1.02 mi9755+101986-241986-2410584(Top 40%)2976(Top 26%)2976(Top 61%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 40%
×21stories
+97ft-345ft

Overall

10537

Females

2100

F18-39

2100

5K→10K

3.1 - 6.2 mi

Top 39%
×5stories
+79ft-138ft

Overall

10285

Females

1948

F18-39

1948

10K→15K

6.2 - 9.3 mi

Top 40%
×3stories
+67ft-78ft

Overall

10537

Females

2100

F18-39

2100

15K→20K

9.3 - 12.4 mi

Top 38%
×5stories
+106ft-86ft

Overall

10120

Females

1976

F18-39

1976

20K→Half

12.4 - 13.1 mi

Top 39%
×2stories
+19ft-37ft

Overall

10456

Females

2111

F18-39

2111

Half→25K

13.1 - 15.5 mi

Top 38%
×4stories
+66ft-88ft

Overall

9985

Females

1997

F18-39

1997

25K→30K

15.5 - 18.6 mi

Top 36%
×9stories
+181ft-148ft

Overall

9653

Females

1999

F18-39

1999

30K→20M

18.6 - 20.0 mi

Top 33%
×5stories
+64ft-50ft

Overall

8799

Females

1719

F18-39

1719

20M→21M

20.0 - 21.0 mi

Top 40%
×8stories
+106ft-24ft

Overall

10683

Females

2709

F18-39

2709

21M→35K

21.0 - 21.8 mi

Top 39%
×7stories
+17ft-86ft

Overall

10493

Females

2593

F18-39

2593

35K→23M

21.8 - 23.0 mi

Top 34%
×5stories
+23ft-63ft

Overall

9140

Females

2103

F18-39

2103

23M→24M

23.0 - 24.0 mi

Top 36%
×6stories
+12ft-82ft

Overall

9673

Females

2422

F18-39

2422

24M→40K

24.0 - 24.9 mi

Top 35%
×1story
+6ft-20ft

Overall

9334

Females

2316

F18-39

2316

40K→25.2M

24.9 - 25.2 mi

Top 35%
×1story
+13ft-16ft

Overall

9300

Females

2359

F18-39

2359

25.2M→Finish

25.2 - 26.2 mi

Top 40%
×2stories
+22ft-21ft

Overall

10584

Females

2976

F18-39

2976

Passing Analysis

Category:
Athletes Passed
1772*
Passed By
1215
Net Change
+556
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10311
5K → 10K317*289+28#10311#10283
10K → 15K157223-66#10283#10349
15K → 20K187*112+75#10349#10274
20K → Half2928+1#10274#10273
Half → 25K17591+84#10273#10189
25K → 30K229*91+138#10189#10051
30K → 20M157*29+128#10051#9923
20M → 21M82104-23#9923#9946
21M → 35K4441+3#9946#9943
35K → 23M10737+70#9943#9873
23M → 24M8740+47#9873#9826
24M → 40K84*48+36#9826#9790
40K → 25.2M4318+25#9790#9765
25.2M → Finish74*64+10#9765#9755
TOTALS1772*1215+556

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

📊

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