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BOSTON MARATHON 2023

Shelby Johnson

Bib: 27004•F

MA

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

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
35:07
Rank: #26025
Start → 5K
35:07 | 11:18/mi
10K· 6.21 mi
1:07:28
Rank: #25368 (+657)
5K → 10K
32:21 | 10:25/mi
15K· 9.32 mi
1:39:57
Rank: #25024 (+344)
10K → 15K
32:29 | 10:27/mi
20K· 12.43 mi
2:13:16
Rank: #24805 (+219)
15K → 20K
33:19 | 10:43/mi
Half· 13.11 mi
2:20:18
Rank: #24760 (+45)
20K → Half
7:02 | 10:19/mi
25K· 15.53 mi
2:46:25
Rank: #24580 (+180)
Half → 25K
26:07 | 10:46/mi
30K· 18.64 mi
3:20:57
Rank: #24311 (+269)
25K → 30K
34:32 | 11:07/mi
20M
3:35:47
Rank: #24178 (+133)
30K → 20M
14:50 | 10:55/mi
21M
3:47:23
Rank: #24075 (+103)
20M → 21M
11:36 | 11:36/mi
35K· 21.75 mi
3:55:39
Rank: #24067 (+8)
21M → 35K
8:16 | 11:03/mi
23M
4:09:04
Rank: #23960 (+107)
35K → 23M
13:25 | 10:43/mi
24M
4:19:30
Rank: #23892 (+68)
23M → 24M
10:26 | 10:26/mi
40K· 24.85 mi
4:28:32
Rank: #23807 (+85)
24M → 40K
9:02 | 10:34/mi
25.2M
4:32:30
Rank: #23782 (+25)
40K → 25.2M
3:58 | 11:30/mi
Finish· 26.22 mi
4:43:19
Rank: #23773 (+9)
25.2M → Finish
10:49 | 10:37/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:20:18
Pace10:42 /mi
2nd Half
Distance13.11 mi
Time2:23:01
Pace10:55 /mi
📊Positive Split: 1.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:58:1035:0711:1835:07
11:18
-
10K
6.21 mi12:30:311:07:2810:5132:21
10:25
-0:53
15K
9.32 mi13:03:001:39:5710:4332:29
10:27
+0:02
20K
12.43 mi13:36:192:13:1610:4333:19
10:43
+0:16
Half
13.11 mi13:43:212:20:1810:427:02
10:19
-0:24
25K
15.53 mi14:09:282:46:2510:4326:07
10:46
+0:27
30K
18.64 mi14:44:003:20:5710:4734:32
11:07
+0:21
20M
20.00 mi14:58:503:35:4710:4714:50
10:55
-0:12
21M
21.00 mi15:10:263:47:2310:5011:36
11:36
+0:41
35K
21.75 mi15:18:423:55:3910:508:16
11:03
-0:33
23M
23.00 mi15:32:074:09:0410:5013:25
10:43
-0:20
24M
24.00 mi15:42:334:19:3010:4910:26
10:26
-0:17
40K
24.85 mi15:51:354:28:3210:489:02
10:34
+0:08
25.2M
25.20 mi15:55:334:32:3010:493:58
11:30
+0:56
Finish
26.22 mi16:06:224:43:1910:4910:49
10:37
-0:53

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

10:19 /mi

Average Pace

10:49 /mi

Slowest Pace

11:36 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

4:27:45

95% of race

Time at Steady Pace

15:34

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 10:48 /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 mi11:58:1035:0711:1835:07
11:18
#26025
10K
6.21 mi12:30:311:07:2810:5132:21
10:25
#25368
15K
9.32 mi13:03:001:39:5710:4332:29
10:27
#25024
20K
12.43 mi13:36:192:13:1610:4333:19
10:43
#24805
Half
13.11 mi13:43:212:20:1810:427:02
10:19
#24760
25K
15.53 mi14:09:282:46:2510:4326:07
10:46
#24580
30K
18.64 mi14:44:003:20:5710:4734:32
11:07
#24311
20M
20.00 mi14:58:503:35:4710:4714:50
10:55
#24178
21M
21.00 mi15:10:263:47:2310:5011:36
11:36
#24075
35K
21.75 mi15:18:423:55:3910:508:16
11:03
#24067
23M
23.00 mi15:32:074:09:0410:5013:25
10:43
#23960
24M
24.00 mi15:42:334:19:3010:4910:26
10:26
#23892
40K
24.85 mi15:51:354:28:3210:489:02
10:34
#23807
25.2M
25.20 mi15:55:334:32:3010:493:58
11:30
#23782
Finish
26.22 mi16:06:224:43:1910:4910:49
10:37
#23773
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi26025110621106224381(Top 92%)10108(Top 88%)10108(Top 207%)
10K6.21 mi3.10 mi25368+65710644+41810644+41824523(Top 92%)10178(Top 89%)10178(Top 208%)
15K9.32 mi3.11 mi25024+34410449+19510449+19524381(Top 92%)10108(Top 88%)10108(Top 207%)
20K12.43 mi3.11 mi24805+21910344+10510344+10524211(Top 91%)10037(Top 88%)10037(Top 206%)
Half13.11 mi0.68 mi24760+4510325+1910325+1923876(Top 90%)9849(Top 86%)9849(Top 202%)
25K15.53 mi2.42 mi24580+18010232+9310232+9323622(Top 89%)9744(Top 85%)9744(Top 200%)
30K18.64 mi3.11 mi24311+26910104+12810104+12823270(Top 87%)9607(Top 84%)9607(Top 197%)
20M20.00 mi1.36 mi24178+13310041+6310041+6322564(Top 85%)9282(Top 81%)9282(Top 190%)
21M21.00 mi1.00 mi24075+1039986+559986+5522070(Top 83%)9038(Top 79%)9038(Top 185%)
35K21.75 mi0.75 mi24067+89986998623399(Top 88%)9817(Top 86%)9817(Top 201%)
23M23.00 mi1.25 mi23960+1079931+559931+5521810(Top 82%)8976(Top 79%)8976(Top 184%)
24M24.00 mi1.00 mi23892+689901+309901+3021890(Top 82%)9049(Top 79%)9049(Top 185%)
40K24.85 mi0.85 mi23807+859857+449857+4421396(Top 80%)8841(Top 77%)8841(Top 181%)
25.2M25.20 mi0.35 mi23782+259852+59852+521613(Top 81%)8928(Top 78%)8928(Top 183%)
Finish26.22 mi1.02 mi23773+99855-39855-323259(Top 87%)9783(Top 86%)9783(Top 200%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 92%
×21stories
+97ft-345ft

Overall

24381

Females

10108

F18-39

10108

5K→10K

3.1 - 6.2 mi

Top 92%
×5stories
+79ft-138ft

Overall

24523

Females

10178

F18-39

10178

10K→15K

6.2 - 9.3 mi

Top 92%
×3stories
+67ft-78ft

Overall

24381

Females

10108

F18-39

10108

15K→20K

9.3 - 12.4 mi

Top 91%
×5stories
+106ft-86ft

Overall

24211

Females

10037

F18-39

10037

20K→Half

12.4 - 13.1 mi

Top 90%
×2stories
+19ft-37ft

Overall

23876

Females

9849

F18-39

9849

Half→25K

13.1 - 15.5 mi

Top 89%
×4stories
+66ft-88ft

Overall

23622

Females

9744

F18-39

9744

25K→30K

15.5 - 18.6 mi

Top 87%
×9stories
+181ft-148ft

Overall

23270

Females

9607

F18-39

9607

30K→20M

18.6 - 20.0 mi

Top 85%
×5stories
+64ft-50ft

Overall

22564

Females

9282

F18-39

9282

20M→21M

20.0 - 21.0 mi

Top 83%
×8stories
+106ft-24ft

Overall

22070

Females

9038

F18-39

9038

21M→35K

21.0 - 21.8 mi

Top 88%
×7stories
+17ft-86ft

Overall

23399

Females

9817

F18-39

9817

35K→23M

21.8 - 23.0 mi

Top 82%
×5stories
+23ft-63ft

Overall

21810

Females

8976

F18-39

8976

23M→24M

23.0 - 24.0 mi

Top 82%
×6stories
+12ft-82ft

Overall

21890

Females

9049

F18-39

9049

24M→40K

24.0 - 24.9 mi

Top 80%
×1story
+6ft-20ft

Overall

21396

Females

8841

F18-39

8841

40K→25.2M

24.9 - 25.2 mi

Top 81%
×1story
+13ft-16ft

Overall

21613

Females

8928

F18-39

8928

25.2M→Finish

25.2 - 26.2 mi

Top 87%
×2stories
+22ft-21ft

Overall

23259

Females

9783

F18-39

9783

Passing Analysis

Category:
Athletes Passed
2358
Passed By
106
Net Change
+2252
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#26025
5K → 10K6636+657#26025#25368
10K → 15K3506+344#25368#25024
15K → 20K24223+219#25024#24805
20K → Half494+45#24805#24760
Half → 25K1866+180#24760#24580
25K → 30K2789+269#24580#24311
30K → 20M1407+133#24311#24178
20M → 21M1052+103#24178#24075
21M → 35K2719+8#24075#24067
35K → 23M1092+107#24067#23960
23M → 24M713+68#23960#23892
24M → 40K850+85#23892#23807
40K → 25.2M305+25#23807#23782
25.2M → Finish2314+9#23782#23773
TOTALS2358106+2252
📊

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