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BOSTON MARATHON 2023

Shelby Kelsh

Bib: 9062•F

MI

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 19%
Gender (Female)
#0 / 11423
Top 4%
Division (F18-39)
#0 / 4884
Top 7%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Watch your race unfold from start to finish

Start
0:00:00
Race begins
5K· 3.11 mi
22:10
Rank: #7102
Start → 5K
22:10 | 7:08/mi
10K· 6.21 mi
44:03
Rank: #7044 (+58)
5K → 10K
21:53 | 7:03/mi
15K· 9.32 mi
1:05:31
Rank: #6686 (+358)
10K → 15K
21:28 | 6:55/mi
20K· 12.43 mi
1:27:23
Rank: #6521 (+165)
15K → 20K
21:52 | 7:02/mi
Half· 13.11 mi
1:32:03
Rank: #6470 (+51)
20K → Half
4:40 | 6:50/mi
25K· 15.53 mi
1:49:00
Rank: #6328 (+142)
Half → 25K
16:57 | 6:59/mi
30K· 18.64 mi
2:11:30
Rank: #6161 (+167)
25K → 30K
22:30 | 7:15/mi
20M
2:21:19
Rank: #6034 (+127)
30K → 20M
9:49 | 7:13/mi
21M
2:28:55
Rank: #5935 (+99)
20M → 21M
7:36 | 7:36/mi
35K· 21.75 mi
2:33:59
Rank: #5851 (+84)
21M → 35K
5:04 | 6:46/mi
23M
2:42:38
Rank: #5644 (+207)
35K → 23M
8:39 | 6:55/mi
24M
2:49:20
Rank: #5484 (+160)
23M → 24M
6:42 | 6:42/mi
40K· 24.85 mi
2:55:14
Rank: #5341 (+143)
24M → 40K
5:54 | 6:54/mi
25.2M
2:57:50
Rank: #5297 (+44)
40K → 25.2M
2:36 | 7:32/mi
Finish· 26.22 mi
3:04:31
Rank: #5156 (+141)
25.2M → Finish
6:41 | 6:34/mi

Course Map & Elevation

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:32:03
Pace7:01 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:32:28
Pace7:03 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:47:5622:107:0822:10
7:08
-
10K
6.21 mi11:09:4944:037:0521:53
7:03
-0:05
15K
9.32 mi11:31:171:05:317:0221:28
6:55
-0:08
20K
12.43 mi11:53:091:27:237:0221:52
7:02
+0:07
Half
13.11 mi11:57:491:32:037:014:40
6:50
-0:12
25K
15.53 mi12:14:461:49:007:0116:57
6:59
+0:09
30K
18.64 mi12:37:162:11:307:0322:30
7:15
+0:16
20M
20.00 mi12:47:052:21:197:049:49
7:13
-0:02
21M
21.00 mi12:54:412:28:557:057:36
7:36
+0:23
35K
21.75 mi12:59:452:33:597:055:04
6:46
-0:50
23M
23.00 mi13:08:242:42:387:048:39
6:55
+0:09
24M
24.00 mi13:15:062:49:207:036:42
6:42
-0:13
40K
24.85 mi13:21:002:55:147:035:54
6:54
+0:12
25.2M
25.20 mi13:23:362:57:507:032:36
7:32
+0:38
Finish
26.22 mi13:30:173:04:317:036:41
6:34
-0:58

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

6:34 /mi

Average Pace

7:03 /mi

Slowest Pace

7:36 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Bar length shows time spent in each segment. Colors mark your faster to slower segments, relative to your own pace.

Time at Faster Pace

2:31:49

82% of race

Time at Steady Pace

32:42

18% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:02 /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

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:47:5622:107:0822:10
7:08
#7102
10K
6.21 mi11:09:4944:037:0521:53
7:03
#7044
15K
9.32 mi11:31:171:05:317:0221:28
6:55
#6686
20K
12.43 mi11:53:091:27:237:0221:52
7:02
#6521
Half
13.11 mi11:57:491:32:037:014:40
6:50
#6470
25K
15.53 mi12:14:461:49:007:0116:57
6:59
#6328
30K
18.64 mi12:37:162:11:307:0322:30
7:15
#6161
20M
20.00 mi12:47:052:21:197:049:49
7:13
#6034
21M
21.00 mi12:54:412:28:557:057:36
7:36
#5935
35K
21.75 mi12:59:452:33:597:055:04
6:46
#5851
23M
23.00 mi13:08:242:42:387:048:39
6:55
#5644
24M
24.00 mi13:15:062:49:207:036:42
6:42
#5484
40K
24.85 mi13:21:002:55:147:035:54
6:54
#5341
25.2M
25.20 mi13:23:362:57:507:032:36
7:32
#5297
Finish
26.22 mi13:30:173:04:317:036:41
6:34
#5156
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi71027427426033(Top 23%)538(Top 5%)538(Top 11%)
10K6.21 mi3.10 mi7044+58745-3745-37101(Top 27%)778(Top 7%)778(Top 16%)
15K9.32 mi3.11 mi6686+358656+89656+896033(Top 23%)538(Top 5%)538(Top 11%)
20K12.43 mi3.11 mi6521+165632+24632+246224(Top 23%)576(Top 5%)576(Top 12%)
Half13.11 mi0.68 mi6470+51622+10622+105674(Top 21%)449(Top 4%)449(Top 9%)
25K15.53 mi2.42 mi6328+142596+26596+265543(Top 21%)439(Top 4%)439(Top 9%)
30K18.64 mi3.11 mi6161+167569+27569+275730(Top 22%)556(Top 5%)556(Top 11%)
20M20.00 mi1.36 mi6034+127551+18551+185257(Top 20%)511(Top 4%)511(Top 10%)
21M21.00 mi1.00 mi5935+99540+11540+115117(Top 19%)553(Top 5%)553(Top 11%)
35K21.75 mi0.75 mi5851+84524+16524+164072(Top 15%)340(Top 3%)340(Top 7%)
23M23.00 mi1.25 mi5644+207485+39485+393331(Top 13%)245(Top 2%)245(Top 5%)
24M24.00 mi1.00 mi5484+160466+19466+193144(Top 12%)231(Top 2%)231(Top 5%)
40K24.85 mi0.85 mi5341+143452+14452+143368(Top 13%)291(Top 3%)291(Top 6%)
25.2M25.20 mi0.35 mi5297+44450+2450+24149(Top 16%)475(Top 4%)475(Top 10%)
Finish26.22 mi1.02 mi5156+141431+19431+192802(Top 11%)251(Top 2%)251(Top 5%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 23%
×21stories
+97ft-345ft

Overall

6033

Females

538

F18-39

538

5K→10K

3.1 - 6.2 mi

Top 27%
×5stories
+79ft-138ft

Overall

7101

Females

778

F18-39

778

10K→15K

6.2 - 9.3 mi

Top 23%
×3stories
+67ft-78ft

Overall

6033

Females

538

F18-39

538

15K→20K

9.3 - 12.4 mi

Top 23%
×5stories
+106ft-86ft

Overall

6224

Females

576

F18-39

576

20K→Half

12.4 - 13.1 mi

Top 21%
×2stories
+19ft-37ft

Overall

5674

Females

449

F18-39

449

Half→25K

13.1 - 15.5 mi

Top 21%
×4stories
+66ft-88ft

Overall

5543

Females

439

F18-39

439

25K→30K

15.5 - 18.6 mi

Top 22%
×9stories
+181ft-148ft

Overall

5730

Females

556

F18-39

556

30K→20M

18.6 - 20.0 mi

Top 20%
×5stories
+64ft-50ft

Overall

5257

Females

511

F18-39

511

20M→21M

20.0 - 21.0 mi

Top 19%
×8stories
+106ft-24ft

Overall

5117

Females

553

F18-39

553

21M→35K

21.0 - 21.8 mi

Top 15%
×7stories
+17ft-86ft

Overall

4072

Females

340

F18-39

340

35K→23M

21.8 - 23.0 mi

Top 13%
×5stories
+23ft-63ft

Overall

3331

Females

245

F18-39

245

23M→24M

23.0 - 24.0 mi

Top 12%
×6stories
+12ft-82ft

Overall

3144

Females

231

F18-39

231

24M→40K

24.0 - 24.9 mi

Top 13%
×1story
+6ft-20ft

Overall

3368

Females

291

F18-39

291

40K→25.2M

24.9 - 25.2 mi

Top 16%
×1story
+13ft-16ft

Overall

4149

Females

475

F18-39

475

25.2M→Finish

25.2 - 26.2 mi

Top 11%
×2stories
+22ft-21ft

Overall

2802

Females

251

F18-39

251

Passing Analysis

Category:
Athletes Passed
2274
Passed By
328
Net Change
+1946
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7102
5K → 10K237179+58#7102#7044
10K → 15K37012+358#7044#6686
15K → 20K20338+165#6686#6521
20K → Half521+51#6521#6470
Half → 25K16018+142#6470#6328
25K → 30K20538+167#6328#6161
30K → 20M13811+127#6161#6034
20M → 21M11213+99#6034#5935
21M → 35K895+84#5935#5851
35K → 23M2081+207#5851#5644
23M → 24M1611+160#5644#5484
24M → 40K1474+143#5484#5341
40K → 25.2M473+44#5341#5297
25.2M → Finish1454+141#5297#5156
TOTALS2274328+1946
📊

Passing Visuals

Category:

📈Position Graph

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🎨Heatmap Timeline

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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