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BOSTON MARATHON 2023

Shelby Webber

Bib: 18106•F

CA

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

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
8:35/mi
26:39
↑ 97↓ 3451.5%
10K· 6.21 mi
8:28/mi
52:56
↑ 79↓ 1380.4%
15K· 9.32 mi
9:18/mi
1:21:51
↑ 67↓ 78
20K· 12.43 mi
9:30/mi
1:51:21
↑ 106↓ 860.1%
Half· 13.11 mi
9:40/mi
1:57:57
↑ 19↓ 370.5%
25K· 15.53 mi
10:18/mi
2:22:56
↑ 66↓ 880.2%
30K· 18.64 mi
10:07/mi
2:54:22
↑ 181↓ 1480.2%
20M
10:17/mi
3:08:20
↑ 64↓ 500.2%
21M
11:13/mi
3:19:33
↑ 106↓ 241.6%
35K· 21.75 mi
10:22/mi
3:27:18
↑ 17↓ 861.7%
23M
10:32/mi
3:40:29
↑ 23↓ 630.6%
24M
10:09/mi
3:50:38
↓ 821.3%
40K· 24.85 mi
10:04/mi
3:59:14
↓ 200.3%
25.2M
10:58/mi
4:03:01
↑ 13↓ 160.2%
Finish· 26.22 mi
9:28/mi
4:12:40
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:57:57
Pace9:00 /mi
2nd Half
Distance13.11 mi
Time2:14:43
Pace10:17 /mi
📊Positive Split: 14.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:4626:398:3526:39
8:35
-
10K
6.21 mi11:45:0352:568:3126:17
8:28
-0:07
15K
9.32 mi12:13:581:21:518:4728:55
9:18
+0:50
20K
12.43 mi12:43:281:51:218:5829:30
9:30
+0:12
Half
13.11 mi12:50:041:57:579:006:36
9:40
+0:10
25K
15.53 mi13:15:032:22:569:1224:59
10:18
+0:38
30K
18.64 mi13:46:292:54:229:2131:26
10:07
-0:11
20M
20.00 mi14:00:273:08:209:2513:58
10:17
+0:10
21M
21.00 mi14:11:403:19:339:3011:13
11:13
+0:56
35K
21.75 mi14:19:253:27:189:327:45
10:22
-0:51
23M
23.00 mi14:32:363:40:299:3513:11
10:32
+0:10
24M
24.00 mi14:42:453:50:389:3710:09
10:09
-0:23
40K
24.85 mi14:51:213:59:149:388:36
10:04
-0:05
25.2M
25.20 mi14:55:084:03:019:393:47
10:58
+0:54
Finish
26.22 mi15:04:474:12:409:399:39
9:28
-1:30

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

8:28 /mi

Average Pace

9:39 /mi

Slowest Pace

11:13 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:07:36

51% of race

Time at Steady Pace

1:36:53

38% of race

Time at Slower Pace

28:11

11% of race

Average Pace: 9:38 /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 mi11:18:4626:398:3526:39
8:35
#18115
10K
6.21 mi11:45:0352:568:3126:17
8:28
#18028
15K
9.32 mi12:13:581:21:518:4728:55
9:18
#19514
20K
12.43 mi12:43:281:51:218:5829:30
9:30
#20155
Half
13.11 mi12:50:041:57:579:006:36
9:40
#20352
25K
15.53 mi13:15:032:22:569:1224:59
10:18
#20934
30K
18.64 mi13:46:292:54:229:2131:26
10:07
#21023
20M
20.00 mi14:00:273:08:209:2513:58
10:17
#21025
21M
21.00 mi14:11:403:19:339:3011:13
11:13
#21036
35K
21.75 mi14:19:253:27:189:327:45
10:22
#21081
23M
23.00 mi14:32:363:40:299:3513:11
10:32
#21082
24M
24.00 mi14:42:453:50:389:3710:09
10:09
#21070
40K
24.85 mi14:51:213:59:149:388:36
10:04
#21034
25.2M
25.20 mi14:55:084:03:019:393:47
10:58
#21029
Finish
26.22 mi15:04:474:12:409:399:39
9:28
#20978
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi181156635663521661(Top 81%)8589(Top 75%)8589(Top 176%)
10K6.21 mi3.10 mi18028+876554+816554+8118013(Top 68%)6485(Top 57%)6485(Top 133%)
15K9.32 mi3.11 mi19514-14867456-9027456-90221661(Top 81%)8589(Top 75%)8589(Top 176%)
20K12.43 mi3.11 mi20155-6417802-3467802-34621545(Top 81%)8547(Top 75%)8547(Top 175%)
Half13.11 mi0.68 mi20352-1977914-1127914-11222590(Top 85%)9121(Top 80%)9121(Top 187%)
25K15.53 mi2.42 mi20934-5828225-3118225-31122849(Top 86%)9297(Top 81%)9297(Top 190%)
30K18.64 mi3.11 mi21023-898298-738298-7321327(Top 80%)8530(Top 75%)8530(Top 175%)
20M20.00 mi1.36 mi21025-28309-118309-1121218(Top 80%)8529(Top 75%)8529(Top 175%)
21M21.00 mi1.00 mi21036-118336-278336-2721313(Top 80%)8627(Top 76%)8627(Top 177%)
35K21.75 mi0.75 mi21081-458371-358371-3522131(Top 83%)9123(Top 80%)9123(Top 187%)
23M23.00 mi1.25 mi21082-18380-98380-921392(Top 80%)8732(Top 76%)8732(Top 179%)
24M24.00 mi1.00 mi21070+128383-38383-321203(Top 80%)8670(Top 76%)8670(Top 178%)
40K24.85 mi0.85 mi21034+368377+68377+620147(Top 76%)8137(Top 71%)8137(Top 167%)
25.2M25.20 mi0.35 mi21029+58381-48381-420420(Top 77%)8277(Top 72%)8277(Top 169%)
Finish26.22 mi1.02 mi20978+518357+248357+2420035(Top 75%)8020(Top 70%)8020(Top 164%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 81%
×21story building
+97ft-345ft

Overall

21661

Females

8589

F18-39

8589

5K→10K

3.1 - 6.2 mi

Top 68%
×5story building
+79ft-138ft

Overall

18013

Females

6485

F18-39

6485

10K→15K

6.2 - 9.3 mi

Top 81%
×3story building
+67ft-78ft

Overall

21661

Females

8589

F18-39

8589

15K→20K

9.3 - 12.4 mi

Top 81%
×5story building
+106ft-86ft

Overall

21545

Females

8547

F18-39

8547

20K→Half

12.4 - 13.1 mi

Top 85%
×2story building
+19ft-37ft

Overall

22590

Females

9121

F18-39

9121

Half→25K

13.1 - 15.5 mi

Top 86%
×4story building
+66ft-88ft

Overall

22849

Females

9297

F18-39

9297

25K→30K

15.5 - 18.6 mi

Top 80%
×9story building
+181ft-148ft

Overall

21327

Females

8530

F18-39

8530

30K→20M

18.6 - 20.0 mi

Top 80%
×5story building
+64ft-50ft

Overall

21218

Females

8529

F18-39

8529

20M→21M

20.0 - 21.0 mi

Top 80%
×8story building
+106ft-24ft

Overall

21313

Females

8627

F18-39

8627

21M→35K

21.0 - 21.8 mi

Top 83%
×7story building
+17ft-86ft

Overall

22131

Females

9123

F18-39

9123

35K→23M

21.8 - 23.0 mi

Top 80%
×5story building
+23ft-63ft

Overall

21392

Females

8732

F18-39

8732

23M→24M

23.0 - 24.0 mi

Top 80%
×6story building
+12ft-82ft

Overall

21203

Females

8670

F18-39

8670

24M→40K

24.0 - 24.9 mi

Top 76%
×1story
+6ft-20ft

Overall

20147

Females

8137

F18-39

8137

40K→25.2M

24.9 - 25.2 mi

Top 77%
×1story
+13ft-16ft

Overall

20420

Females

8277

F18-39

8277

25.2M→Finish

25.2 - 26.2 mi

Top 75%
×2story building
+22ft-21ft

Overall

20035

Females

8020

F18-39

8020

Passing Analysis

Category:
Athletes Passed
975
Passed By
3838
Net Change
-2863
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18115
5K → 10K363276+87#18115#18028
10K → 15K91495-1486#18028#19514
15K → 20K51692-641#19514#20155
20K → Half4201-197#20155#20352
Half → 25K13595-582#20352#20934
25K → 30K118207-89#20934#21023
30K → 20M7072-2#21023#21025
20M → 21M5970-11#21025#21036
21M → 35K2772-45#21036#21081
35K → 23M5960-1#21081#21082
23M → 24M4836+12#21082#21070
24M → 40K6024+36#21070#21034
40K → 25.2M2520+5#21034#21029
25.2M → Finish6918+51#21029#20978
TOTALS9753838-2863
📊

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