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BOSTON MARATHON 2023

Caitlin Swalec

Bib: 17886•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
8:11/mi
25:26
↑ 97↓ 3451.5%
10K· 6.21 mi
8:10/mi
50:48
↑ 79↓ 1380.4%
15K· 9.32 mi
8:30/mi
1:17:11
↑ 67↓ 78
20K· 12.43 mi
8:40/mi
1:44:07
↑ 106↓ 860.1%
Half· 13.11 mi
8:23/mi
1:49:50
↑ 19↓ 370.5%
25K· 15.53 mi
8:39/mi
2:10:49
↑ 66↓ 880.2%
30K· 18.64 mi
9:04/mi
2:38:58
↑ 181↓ 1480.2%
20M
9:12/mi
2:51:28
↑ 64↓ 500.2%
21M
9:52/mi
3:01:20
↑ 106↓ 241.6%
35K· 21.75 mi
8:49/mi
3:07:56
↑ 17↓ 861.7%
23M
9:25/mi
3:19:43
↑ 23↓ 630.6%
24M
9:03/mi
3:28:46
↓ 821.3%
40K· 24.85 mi
9:27/mi
3:36:51
↓ 200.3%
25.2M
10:18/mi
3:40:24
↑ 13↓ 160.2%
Finish· 26.22 mi
9:14/mi
3:49:49
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:49:50
Pace8:23 /mi
2nd Half
Distance13.11 mi
Time1:59:59
Pace9:09 /mi
📊Positive Split: 9.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:2125:268:1125:26
8:11
-
10K
6.21 mi11:41:4350:488:1125:22
8:10
-0:01
15K
9.32 mi12:08:061:17:118:1726:23
8:30
+0:20
20K
12.43 mi12:35:021:44:078:2326:56
8:40
+0:10
Half
13.11 mi12:40:451:49:508:235:43
8:23
-0:17
25K
15.53 mi13:01:442:10:498:2520:59
8:39
+0:16
30K
18.64 mi13:29:532:38:588:3228:09
9:04
+0:25
20M
20.00 mi13:42:232:51:288:3412:30
9:12
+0:08
21M
21.00 mi13:52:153:01:208:389:52
9:52
+0:40
35K
21.75 mi13:58:513:07:568:386:36
8:49
-1:03
23M
23.00 mi14:10:383:19:438:4111:47
9:25
+0:36
24M
24.00 mi14:19:413:28:468:429:03
9:03
-0:22
40K
24.85 mi14:27:463:36:518:438:05
9:27
+0:24
25.2M
25.20 mi14:31:193:40:248:453:33
10:18
+0:51
Finish
26.22 mi14:40:443:49:498:469:25
9:14
-1:04

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

8:10 /mi

Average Pace

8:46 /mi

Slowest Pace

10:18 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:10:49

57% of race

Time at Steady Pace

1:05:43

29% of race

Time at Slower Pace

33:17

14% of race

Average Pace: 8:46 /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 mi11:16:2125:268:1125:26
8:11
#15382
10K
6.21 mi11:41:4350:488:1125:22
8:10
#15656
15K
9.32 mi12:08:061:17:118:1726:23
8:30
#16381
20K
12.43 mi12:35:021:44:078:2326:56
8:40
#16788
Half
13.11 mi12:40:451:49:508:235:43
8:23
#16817
25K
15.53 mi13:01:442:10:498:2520:59
8:39
#16867
30K
18.64 mi13:29:532:38:588:3228:09
9:04
#16937
20M
20.00 mi13:42:232:51:288:3412:30
9:12
#16968
21M
21.00 mi13:52:153:01:208:389:52
9:52
#16994
35K
21.75 mi13:58:513:07:568:386:36
8:49
#17008
23M
23.00 mi14:10:383:19:438:4111:47
9:25
#17067
24M
24.00 mi14:19:413:28:468:429:03
9:03
#17084
40K
24.85 mi14:27:463:36:518:438:05
9:27
#17143
25.2M
25.20 mi14:31:193:40:248:453:33
10:18
#17186
Finish
26.22 mi14:40:443:49:498:469:25
9:14
#17302
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi153824892489217764(Top 67%)6370(Top 56%)6370(Top 130%)
10K6.21 mi3.10 mi15656-2745066-1745066-17416021(Top 60%)5288(Top 46%)5288(Top 108%)
15K9.32 mi3.11 mi16381-7255517-4515517-45117764(Top 67%)6370(Top 56%)6370(Top 130%)
20K12.43 mi3.11 mi16788-4075797-2805797-28017933(Top 67%)6474(Top 57%)6474(Top 133%)
Half13.11 mi0.68 mi16817-295809-125809-1217061(Top 64%)5940(Top 52%)5940(Top 122%)
25K15.53 mi2.42 mi16867-505873-645873-6417145(Top 64%)6088(Top 53%)6088(Top 125%)
30K18.64 mi3.11 mi16937-705924-515924-5117498(Top 66%)6356(Top 56%)6356(Top 130%)
20M20.00 mi1.36 mi16968-315950-265950-2617549(Top 66%)6477(Top 57%)6477(Top 133%)
21M21.00 mi1.00 mi16994-265988-385988-3817523(Top 66%)6491(Top 57%)6491(Top 133%)
35K21.75 mi0.75 mi17008-146002-146002-1417079(Top 64%)6317(Top 55%)6317(Top 129%)
23M23.00 mi1.25 mi17067-596060-586060-5817981(Top 68%)6853(Top 60%)6853(Top 140%)
24M24.00 mi1.00 mi17084-176094-346094-3417466(Top 66%)6614(Top 58%)6614(Top 135%)
40K24.85 mi0.85 mi17143-596138-446138-4418183(Top 68%)7038(Top 62%)7038(Top 144%)
25.2M25.20 mi0.35 mi17186-436168-306168-3018470(Top 69%)7203(Top 63%)7203(Top 147%)
Finish26.22 mi1.02 mi17302-1166243-756243-7519121(Top 72%)7498(Top 66%)7498(Top 154%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 67%
×21story building
+97ft-345ft

Overall

17764

Females

6370

F18-39

6370

5K→10K

3.1 - 6.2 mi

Top 60%
×5story building
+79ft-138ft

Overall

16021

Females

5288

F18-39

5288

10K→15K

6.2 - 9.3 mi

Top 67%
×3story building
+67ft-78ft

Overall

17764

Females

6370

F18-39

6370

15K→20K

9.3 - 12.4 mi

Top 67%
×5story building
+106ft-86ft

Overall

17933

Females

6474

F18-39

6474

20K→Half

12.4 - 13.1 mi

Top 64%
×2story building
+19ft-37ft

Overall

17061

Females

5940

F18-39

5940

Half→25K

13.1 - 15.5 mi

Top 64%
×4story building
+66ft-88ft

Overall

17145

Females

6088

F18-39

6088

25K→30K

15.5 - 18.6 mi

Top 66%
×9story building
+181ft-148ft

Overall

17498

Females

6356

F18-39

6356

30K→20M

18.6 - 20.0 mi

Top 66%
×5story building
+64ft-50ft

Overall

17549

Females

6477

F18-39

6477

20M→21M

20.0 - 21.0 mi

Top 66%
×8story building
+106ft-24ft

Overall

17523

Females

6491

F18-39

6491

21M→35K

21.0 - 21.8 mi

Top 64%
×7story building
+17ft-86ft

Overall

17079

Females

6317

F18-39

6317

35K→23M

21.8 - 23.0 mi

Top 68%
×5story building
+23ft-63ft

Overall

17981

Females

6853

F18-39

6853

23M→24M

23.0 - 24.0 mi

Top 66%
×6story building
+12ft-82ft

Overall

17466

Females

6614

F18-39

6614

24M→40K

24.0 - 24.9 mi

Top 68%
×1story
+6ft-20ft

Overall

18183

Females

7038

F18-39

7038

40K→25.2M

24.9 - 25.2 mi

Top 69%
×1story
+13ft-16ft

Overall

18470

Females

7203

F18-39

7203

25.2M→Finish

25.2 - 26.2 mi

Top 72%
×2story building
+22ft-21ft

Overall

19121

Females

7498

F18-39

7498

Passing Analysis

Category:
Athletes Passed
956
Passed By
2876
Net Change
-1920
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15382
5K → 10K189463-274#15382#15656
10K → 15K39764-725#15656#16381
15K → 20K76483-407#16381#16788
20K → Half1241-29#16788#16817
Half → 25K99149-50#16817#16867
25K → 30K148218-70#16867#16937
30K → 20M6596-31#16937#16968
20M → 21M78104-26#16968#16994
21M → 35K4256-14#16994#17008
35K → 23M65124-59#17008#17067
23M → 24M6178-17#17067#17084
24M → 40K3796-59#17084#17143
40K → 25.2M1659-43#17143#17186
25.2M → Finish29145-116#17186#17302
TOTALS9562876-1920
📊

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