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BOSTON MARATHON 2023

Jillian Calero

Bib: 27582•F

NY

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
8:57/mi
27:49
↑ 97↓ 3451.5%
10K· 6.21 mi
8:38/mi
54:39
↑ 79↓ 1380.4%
15K· 9.32 mi
8:38/mi
1:21:28
↑ 67↓ 78
20K· 12.43 mi
8:50/mi
1:48:55
↑ 106↓ 860.1%
Half· 13.11 mi
8:27/mi
1:54:41
↑ 19↓ 370.5%
25K· 15.53 mi
8:50/mi
2:16:05
↑ 66↓ 880.2%
30K· 18.64 mi
9:30/mi
2:45:35
↑ 181↓ 1480.2%
20M
10:24/mi
2:59:43
↑ 64↓ 500.2%
21M
11:28/mi
3:11:11
↑ 106↓ 241.6%
35K· 21.75 mi
9:48/mi
3:18:31
↑ 17↓ 861.7%
23M
10:04/mi
3:31:07
↑ 23↓ 630.6%
24M
10:11/mi
3:41:18
↓ 821.3%
40K· 24.85 mi
10:29/mi
3:50:16
↓ 200.3%
25.2M
11:13/mi
3:54:08
↑ 13↓ 160.2%
Finish· 26.22 mi
10:02/mi
4:04:21
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:54:41
Pace8:45 /mi
2nd Half
Distance13.11 mi
Time2:09:40
Pace9:53 /mi
📊Positive Split: 13.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:44:4327:498:5727:49
8:57
-
10K
6.21 mi12:11:3354:398:4826:50
8:38
-0:19
15K
9.32 mi12:38:221:21:288:4426:49
8:38
0:00
20K
12.43 mi13:05:491:48:558:4627:27
8:50
+0:12
Half
13.11 mi13:11:351:54:418:455:46
8:27
-0:23
25K
15.53 mi13:32:592:16:058:4621:24
8:50
+0:23
30K
18.64 mi14:02:292:45:358:5329:30
9:30
+0:40
20M
20.00 mi14:16:372:59:438:5914:08
10:24
+0:54
21M
21.00 mi14:28:053:11:119:0611:28
11:28
+1:04
35K
21.75 mi14:35:253:18:319:087:20
9:48
-1:40
23M
23.00 mi14:48:013:31:079:1112:36
10:04
+0:16
24M
24.00 mi14:58:123:41:189:1310:11
10:11
+0:07
40K
24.85 mi15:07:103:50:169:168:58
10:29
+0:18
25.2M
25.20 mi15:11:023:54:089:173:52
11:13
+0:44
Finish
26.22 mi15:21:154:04:219:2010:13
10:02
-1:11

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

8:27 /mi

Average Pace

9:20 /mi

Slowest Pace

11:28 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:16:05

56% of race

Time at Steady Pace

1:09:50

29% of race

Time at Slower Pace

38:26

16% of race

Average Pace: 9:19 /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 mi11:44:4327:498:5727:49
8:57
#20239
10K
6.21 mi12:11:3354:398:4826:50
8:38
#19652
15K
9.32 mi12:38:221:21:288:4426:49
8:38
#19277
20K
12.43 mi13:05:491:48:558:4627:27
8:50
#19144
Half
13.11 mi13:11:351:54:418:455:46
8:27
#19061
25K
15.53 mi13:32:592:16:058:4621:24
8:50
#18894
30K
18.64 mi14:02:292:45:358:5329:30
9:30
#19018
20M
20.00 mi14:16:372:59:438:5914:08
10:24
#19299
21M
21.00 mi14:28:053:11:119:0611:28
11:28
#19529
35K
21.75 mi14:35:253:18:319:087:20
9:48
#19600
23M
23.00 mi14:48:013:31:079:1112:36
10:04
#19655
24M
24.00 mi14:58:123:41:189:1310:11
10:11
#19749
40K
24.85 mi15:07:103:50:169:168:58
10:29
#19829
25.2M
25.20 mi15:11:023:54:089:173:52
11:13
#19861
Finish
26.22 mi15:21:154:04:219:2010:13
10:02
#19960
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi202397963796318645(Top 70%)6888(Top 60%)6888(Top 141%)
10K6.21 mi3.10 mi19652+5877564+3997564+39919071(Top 72%)7127(Top 62%)7127(Top 146%)
15K9.32 mi3.11 mi19277+3757303+2617303+26118645(Top 70%)6888(Top 60%)6888(Top 141%)
20K12.43 mi3.11 mi19144+1337203+1007203+10018873(Top 71%)7015(Top 61%)7015(Top 144%)
Half13.11 mi0.68 mi19061+837159+447159+4417532(Top 66%)6215(Top 54%)6215(Top 127%)
25K15.53 mi2.42 mi18894+1677059+1007059+10018115(Top 68%)6617(Top 58%)6617(Top 135%)
30K18.64 mi3.11 mi19018-1247149-907149-9019431(Top 73%)7435(Top 65%)7435(Top 152%)
20M20.00 mi1.36 mi19299-2817331-1827331-18221523(Top 81%)8709(Top 76%)8709(Top 178%)
21M21.00 mi1.00 mi19529-2307477-1467477-14621826(Top 82%)8899(Top 78%)8899(Top 182%)
35K21.75 mi0.75 mi19600-717521-447521-4420774(Top 78%)8374(Top 73%)8374(Top 171%)
23M23.00 mi1.25 mi19655-557557-367557-3620176(Top 76%)8060(Top 71%)8060(Top 165%)
24M24.00 mi1.00 mi19749-947624-677624-6721292(Top 80%)8717(Top 76%)8717(Top 178%)
40K24.85 mi0.85 mi19829-807684-607684-6021186(Top 80%)8714(Top 76%)8714(Top 178%)
25.2M25.20 mi0.35 mi19861-327704-207704-2020957(Top 79%)8563(Top 75%)8563(Top 175%)
Finish26.22 mi1.02 mi19960-997770-667770-6621828(Top 82%)9020(Top 79%)9020(Top 185%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 70%
×21story building
+97ft-345ft

Overall

18645

Females

6888

F18-39

6888

5K→10K

3.1 - 6.2 mi

Top 72%
×5story building
+79ft-138ft

Overall

19071

Females

7127

F18-39

7127

10K→15K

6.2 - 9.3 mi

Top 70%
×3story building
+67ft-78ft

Overall

18645

Females

6888

F18-39

6888

15K→20K

9.3 - 12.4 mi

Top 71%
×5story building
+106ft-86ft

Overall

18873

Females

7015

F18-39

7015

20K→Half

12.4 - 13.1 mi

Top 66%
×2story building
+19ft-37ft

Overall

17532

Females

6215

F18-39

6215

Half→25K

13.1 - 15.5 mi

Top 68%
×4story building
+66ft-88ft

Overall

18115

Females

6617

F18-39

6617

25K→30K

15.5 - 18.6 mi

Top 73%
×9story building
+181ft-148ft

Overall

19431

Females

7435

F18-39

7435

30K→20M

18.6 - 20.0 mi

Top 81%
×5story building
+64ft-50ft

Overall

21523

Females

8709

F18-39

8709

20M→21M

20.0 - 21.0 mi

Top 82%
×8story building
+106ft-24ft

Overall

21826

Females

8899

F18-39

8899

21M→35K

21.0 - 21.8 mi

Top 78%
×7story building
+17ft-86ft

Overall

20774

Females

8374

F18-39

8374

35K→23M

21.8 - 23.0 mi

Top 76%
×5story building
+23ft-63ft

Overall

20176

Females

8060

F18-39

8060

23M→24M

23.0 - 24.0 mi

Top 80%
×6story building
+12ft-82ft

Overall

21292

Females

8717

F18-39

8717

24M→40K

24.0 - 24.9 mi

Top 80%
×1story
+6ft-20ft

Overall

21186

Females

8714

F18-39

8714

40K→25.2M

24.9 - 25.2 mi

Top 79%
×1story
+13ft-16ft

Overall

20957

Females

8563

F18-39

8563

25.2M→Finish

25.2 - 26.2 mi

Top 82%
×2story building
+22ft-21ft

Overall

21828

Females

9020

F18-39

9020

Passing Analysis

Category:
Athletes Passed
1999
Passed By
1720
Net Change
+279
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20239
5K → 10K709122+587#20239#19652
10K → 15K43358+375#19652#19277
15K → 20K22289+133#19277#19144
20K → Half852+83#19144#19061
Half → 25K20538+167#19061#18894
25K → 30K125249-124#18894#19018
30K → 20M27308-281#19018#19299
20M → 21M31261-230#19299#19529
21M → 35K2293-71#19529#19600
35K → 23M54109-55#19600#19655
23M → 24M24118-94#19655#19749
24M → 40K29109-80#19749#19829
40K → 25.2M1648-32#19829#19861
25.2M → Finish17116-99#19861#19960
TOTALS19991720+279
📊

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