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BOSTON MARATHON 2023

Julie Chamberlin

Bib: 14805•F

IL

0:00
0:00
/ mi
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 45%
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
8:05/mi
25:08
↑ 97↓ 3451.5%
10K· 6.21 mi
7:52/mi
49:33
↑ 79↓ 1380.4%
15K· 9.32 mi
7:58/mi
1:14:17
↑ 67↓ 78
20K· 12.43 mi
8:15/mi
1:39:55
↑ 106↓ 860.1%
Half· 13.11 mi
8:26/mi
1:45:40
↑ 19↓ 370.5%
25K· 15.53 mi
8:48/mi
2:07:00
↑ 66↓ 880.2%
30K· 18.64 mi
9:05/mi
2:35:13
↑ 181↓ 1480.2%
20M
9:01/mi
2:47:28
↑ 64↓ 500.2%
21M
9:31/mi
2:56:59
↑ 106↓ 241.6%
35K· 21.75 mi
8:39/mi
3:03:27
↑ 17↓ 861.7%
23M
9:17/mi
3:15:04
↑ 23↓ 630.6%
24M
8:08/mi
3:23:12
↓ 821.3%
40K· 24.85 mi
7:50/mi
3:29:54
↓ 200.3%
25.2M
9:05/mi
3:33:02
↑ 13↓ 160.2%
Finish· 26.22 mi
8:21/mi
3:41:33
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:45:40
Pace8:04 /mi
2nd Half
Distance13.11 mi
Time1:55:53
Pace8:50 /mi
📊Positive Split: 9.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:55:3925:088:0525:08
8:05
-
10K
6.21 mi11:20:0449:337:5824:25
7:52
-0:13
15K
9.32 mi11:44:481:14:177:5824:44
7:58
+0:06
20K
12.43 mi12:10:261:39:558:0225:38
8:15
+0:17
Half
13.11 mi12:16:111:45:408:045:45
8:26
+0:11
25K
15.53 mi12:37:312:07:008:1121:20
8:48
+0:22
30K
18.64 mi13:05:442:35:138:2028:13
9:05
+0:17
20M
20.00 mi13:17:592:47:288:2212:15
9:01
-0:04
21M
21.00 mi13:27:302:56:598:269:31
9:31
+0:30
35K
21.75 mi13:33:583:03:278:266:28
8:39
-0:52
23M
23.00 mi13:45:353:15:048:2911:37
9:17
+0:38
24M
24.00 mi13:53:433:23:128:288:08
8:08
-1:09
40K
24.85 mi14:00:253:29:548:276:42
7:50
-0:18
25.2M
25.20 mi14:03:333:33:028:273:08
9:05
+1:15
Finish
26.22 mi14:12:043:41:338:278:31
8:21
-0:44

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

7:50 /mi

Average Pace

8:27 /mi

Slowest Pace

9:31 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:29:07

40% of race

Time at Steady Pace

46:22

21% of race

Time at Slower Pace

1:26:04

39% of race

Average Pace: 8:27 /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 mi10:55:3925:088:0525:08
8:05
#14651
10K
6.21 mi11:20:0449:337:5824:25
7:52
#14210
15K
9.32 mi11:44:481:14:177:5824:44
7:58
#14143
20K
12.43 mi12:10:261:39:558:0225:38
8:15
#14397
Half
13.11 mi12:16:111:45:408:045:45
8:26
#14587
25K
15.53 mi12:37:312:07:008:1121:20
8:48
#15169
30K
18.64 mi13:05:442:35:138:2028:13
9:05
#15656
20M
20.00 mi13:17:592:47:288:2212:15
9:01
#15689
21M
21.00 mi13:27:302:56:598:269:31
9:31
#15709
35K
21.75 mi13:33:583:03:278:266:28
8:39
#15722
23M
23.00 mi13:45:353:15:048:2911:37
9:17
#15812
24M
24.00 mi13:53:433:23:128:288:08
8:08
#15648
40K
24.85 mi14:00:253:29:548:276:42
7:50
#15426
25.2M
25.20 mi14:03:333:33:028:273:08
9:05
#15368
Finish
26.22 mi14:12:043:41:338:278:31
8:21
#15314
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi146514420442014087(Top 53%)4137(Top 36%)4137(Top 85%)
10K6.21 mi3.10 mi14210+4414173+2474173+24713662(Top 51%)3836(Top 34%)3836(Top 79%)
15K9.32 mi3.11 mi14143+674147+264147+2614087(Top 53%)4137(Top 36%)4137(Top 85%)
20K12.43 mi3.11 mi14397-2544313-1664313-16615290(Top 57%)4894(Top 43%)4894(Top 100%)
Half13.11 mi0.68 mi14587-1904420-1074420-10717305(Top 65%)6051(Top 53%)6051(Top 124%)
25K15.53 mi2.42 mi15169-5824817-3974817-39717946(Top 67%)6525(Top 57%)6525(Top 134%)
30K18.64 mi3.11 mi15656-4875158-3415158-34117605(Top 66%)6415(Top 56%)6415(Top 131%)
20M20.00 mi1.36 mi15689-335201-435201-4316624(Top 62%)5926(Top 52%)5926(Top 121%)
21M21.00 mi1.00 mi15709-205251-505251-5016049(Top 60%)5656(Top 50%)5656(Top 116%)
35K21.75 mi0.75 mi15722-135267-165267-1616114(Top 61%)5753(Top 50%)5753(Top 118%)
23M23.00 mi1.25 mi15812-905346-795346-7917414(Top 65%)6509(Top 57%)6509(Top 133%)
24M24.00 mi1.00 mi15648+1645268+785268+7812186(Top 46%)3697(Top 32%)3697(Top 76%)
40K24.85 mi0.85 mi15426+2225145+1235145+1238961(Top 34%)2177(Top 19%)2177(Top 45%)
25.2M25.20 mi0.35 mi15368+585117+285117+2813097(Top 49%)4295(Top 38%)4295(Top 88%)
Finish26.22 mi1.02 mi15314+545090+275090+2714483(Top 54%)4991(Top 44%)4991(Top 102%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 53%
×21story building
+97ft-345ft

Overall

14087

Females

4137

F18-39

4137

5K→10K

3.1 - 6.2 mi

Top 51%
×5story building
+79ft-138ft

Overall

13662

Females

3836

F18-39

3836

10K→15K

6.2 - 9.3 mi

Top 53%
×3story building
+67ft-78ft

Overall

14087

Females

4137

F18-39

4137

15K→20K

9.3 - 12.4 mi

Top 57%
×5story building
+106ft-86ft

Overall

15290

Females

4894

F18-39

4894

20K→Half

12.4 - 13.1 mi

Top 65%
×2story building
+19ft-37ft

Overall

17305

Females

6051

F18-39

6051

Half→25K

13.1 - 15.5 mi

Top 67%
×4story building
+66ft-88ft

Overall

17946

Females

6525

F18-39

6525

25K→30K

15.5 - 18.6 mi

Top 66%
×9story building
+181ft-148ft

Overall

17605

Females

6415

F18-39

6415

30K→20M

18.6 - 20.0 mi

Top 62%
×5story building
+64ft-50ft

Overall

16624

Females

5926

F18-39

5926

20M→21M

20.0 - 21.0 mi

Top 60%
×8story building
+106ft-24ft

Overall

16049

Females

5656

F18-39

5656

21M→35K

21.0 - 21.8 mi

Top 61%
×7story building
+17ft-86ft

Overall

16114

Females

5753

F18-39

5753

35K→23M

21.8 - 23.0 mi

Top 65%
×5story building
+23ft-63ft

Overall

17414

Females

6509

F18-39

6509

23M→24M

23.0 - 24.0 mi

Top 46%
×6story building
+12ft-82ft

Overall

12186

Females

3697

F18-39

3697

24M→40K

24.0 - 24.9 mi

Top 34%
×1story
+6ft-20ft

Overall

8961

Females

2177

F18-39

2177

40K→25.2M

24.9 - 25.2 mi

Top 49%
×1story
+13ft-16ft

Overall

13097

Females

4295

F18-39

4295

25.2M→Finish

25.2 - 26.2 mi

Top 54%
×2story building
+22ft-21ft

Overall

14483

Females

4991

F18-39

4991

Passing Analysis

Category:
Athletes Passed
1822
Passed By
2485
Net Change
-663
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14651
5K → 10K581140+441#14651#14210
10K → 15K223156+67#14210#14143
15K → 20K108362-254#14143#14397
20K → Half2192-190#14397#14587
Half → 25K40622-582#14587#15169
25K → 30K59546-487#15169#15656
30K → 20M78111-33#15656#15689
20M → 21M86106-20#15689#15709
21M → 35K4457-13#15709#15722
35K → 23M50140-90#15722#15812
23M → 24M17612+164#15812#15648
24M → 40K2220+222#15648#15426
40K → 25.2M602+58#15426#15368
25.2M → Finish9339+54#15368#15314
TOTALS18222485-663
📊

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