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BOSTON MARATHON 2023

Samantha Jezak

Bib: 26098•F

MA

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
8:43/mi
27:05
↑ 97↓ 3451.5%
10K· 6.21 mi
8:34/mi
53:42
↑ 79↓ 1380.4%
15K· 9.32 mi
8:45/mi
1:20:54
↑ 67↓ 78
20K· 12.43 mi
9:45/mi
1:51:11
↑ 106↓ 860.1%
Half· 13.11 mi
9:57/mi
1:57:58
↑ 19↓ 370.5%
25K· 15.53 mi
11:14/mi
2:25:12
↑ 66↓ 880.2%
30K· 18.64 mi
11:26/mi
3:00:43
↑ 181↓ 1480.2%
20M
10:54/mi
3:15:32
↑ 64↓ 500.2%
21M
13:00/mi
3:28:32
↑ 106↓ 241.6%
35K· 21.75 mi
10:58/mi
3:36:44
↑ 17↓ 861.7%
23M
10:38/mi
3:50:03
↑ 23↓ 630.6%
24M
10:46/mi
4:00:49
↓ 821.3%
40K· 24.85 mi
12:05/mi
4:11:09
↓ 200.3%
25.2M
12:31/mi
4:15:28
↑ 13↓ 160.2%
Finish· 26.22 mi
10:09/mi
4:25:49
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:57:58
Pace9:00 /mi
2nd Half
Distance13.11 mi
Time2:27:51
Pace11:17 /mi
📊Positive Split: 25.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:50:0527:058:4327:05
8:43
-
10K
6.21 mi12:16:4253:428:3926:37
8:34
-0:09
15K
9.32 mi12:43:541:20:548:4127:12
8:45
+0:11
20K
12.43 mi13:14:111:51:118:5730:17
9:45
+1:00
Half
13.11 mi13:20:581:57:589:006:47
9:57
+0:12
25K
15.53 mi13:48:122:25:129:2127:14
11:14
+1:17
30K
18.64 mi14:23:433:00:439:4235:31
11:26
+0:12
20M
20.00 mi14:38:323:15:329:4714:49
10:54
-0:32
21M
21.00 mi14:51:323:28:329:5613:00
13:00
+2:06
35K
21.75 mi14:59:443:36:449:588:12
10:58
-2:02
23M
23.00 mi15:13:033:50:0310:0013:19
10:38
-0:20
24M
24.00 mi15:23:494:00:4910:0210:46
10:46
+0:08
40K
24.85 mi15:34:094:11:0910:0610:20
12:05
+1:19
25.2M
25.20 mi15:38:284:15:2810:084:19
12:31
+0:26
Finish
26.22 mi15:48:494:25:4910:0910:21
10:09
-2:22

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

8:34 /mi

Average Pace

10:09 /mi

Slowest Pace

13:00 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:57:58

44% of race

Time at Steady Pace

1:24:41

32% of race

Time at Slower Pace

1:03:10

24% of race

Average Pace: 10:08 /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 mi11:50:0527:058:4327:05
8:43
#19006
10K
6.21 mi12:16:4253:428:3926:37
8:34
#18767
15K
9.32 mi12:43:541:20:548:4127:12
8:45
#18928
20K
12.43 mi13:14:111:51:118:5730:17
9:45
#20098
Half
13.11 mi13:20:581:57:589:006:47
9:57
#20356
25K
15.53 mi13:48:122:25:129:2127:14
11:14
#21436
30K
18.64 mi14:23:433:00:439:4235:31
11:26
#22049
20M
20.00 mi14:38:323:15:329:4714:49
10:54
#22101
21M
21.00 mi14:51:323:28:329:5613:00
13:00
#22247
35K
21.75 mi14:59:443:36:449:588:12
10:58
#22287
23M
23.00 mi15:13:033:50:0310:0013:19
10:38
#22257
24M
24.00 mi15:23:494:00:4910:0210:46
10:46
#22278
40K
24.85 mi15:34:094:11:0910:0610:20
12:05
#22360
25.2M
25.20 mi15:38:284:15:2810:084:19
12:31
#22381
Finish
26.22 mi15:48:494:25:4910:0910:21
10:09
#22374
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi190067215721519280(Top 72%)7262(Top 64%)7262(Top 149%)
10K6.21 mi3.10 mi18767+2396989+2266989+22618671(Top 70%)6881(Top 60%)6881(Top 141%)
15K9.32 mi3.11 mi18928-1617090-1017090-10119280(Top 72%)7262(Top 64%)7262(Top 149%)
20K12.43 mi3.11 mi20098-11707773-6837773-68322282(Top 84%)8952(Top 78%)8952(Top 183%)
Half13.11 mi0.68 mi20356-2587917-1447917-14423166(Top 87%)9445(Top 83%)9445(Top 193%)
25K15.53 mi2.42 mi21436-10808509-5928509-59224316(Top 91%)10123(Top 89%)10123(Top 207%)
30K18.64 mi3.11 mi22049-6138863-3548863-35423761(Top 89%)9875(Top 86%)9875(Top 202%)
20M20.00 mi1.36 mi22101-528904-418904-4122530(Top 85%)9262(Top 81%)9262(Top 190%)
21M21.00 mi1.00 mi22247-1468998-948998-9424079(Top 90%)10134(Top 89%)10134(Top 207%)
35K21.75 mi0.75 mi22287-409029-319029-3123245(Top 87%)9722(Top 85%)9722(Top 199%)
23M23.00 mi1.25 mi22257+309016+139016+1321641(Top 81%)8873(Top 78%)8873(Top 182%)
24M24.00 mi1.00 mi22278-219032-169032-1622609(Top 85%)9423(Top 82%)9423(Top 193%)
40K24.85 mi0.85 mi22360-829089-579089-5723998(Top 90%)10180(Top 89%)10180(Top 208%)
25.2M25.20 mi0.35 mi22381-219108-199108-1923323(Top 88%)9836(Top 86%)9836(Top 201%)
Finish26.22 mi1.02 mi22374+79112-49112-422189(Top 83%)9223(Top 81%)9223(Top 189%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 72%
×21story building
+97ft-345ft

Overall

19280

Females

7262

F18-39

7262

5K→10K

3.1 - 6.2 mi

Top 70%
×5story building
+79ft-138ft

Overall

18671

Females

6881

F18-39

6881

10K→15K

6.2 - 9.3 mi

Top 72%
×3story building
+67ft-78ft

Overall

19280

Females

7262

F18-39

7262

15K→20K

9.3 - 12.4 mi

Top 84%
×5story building
+106ft-86ft

Overall

22282

Females

8952

F18-39

8952

20K→Half

12.4 - 13.1 mi

Top 87%
×2story building
+19ft-37ft

Overall

23166

Females

9445

F18-39

9445

Half→25K

13.1 - 15.5 mi

Top 91%
×4story building
+66ft-88ft

Overall

24316

Females

10123

F18-39

10123

25K→30K

15.5 - 18.6 mi

Top 89%
×9story building
+181ft-148ft

Overall

23761

Females

9875

F18-39

9875

30K→20M

18.6 - 20.0 mi

Top 85%
×5story building
+64ft-50ft

Overall

22530

Females

9262

F18-39

9262

20M→21M

20.0 - 21.0 mi

Top 90%
×8story building
+106ft-24ft

Overall

24079

Females

10134

F18-39

10134

21M→35K

21.0 - 21.8 mi

Top 87%
×7story building
+17ft-86ft

Overall

23245

Females

9722

F18-39

9722

35K→23M

21.8 - 23.0 mi

Top 81%
×5story building
+23ft-63ft

Overall

21641

Females

8873

F18-39

8873

23M→24M

23.0 - 24.0 mi

Top 85%
×6story building
+12ft-82ft

Overall

22609

Females

9423

F18-39

9423

24M→40K

24.0 - 24.9 mi

Top 90%
×1story
+6ft-20ft

Overall

23998

Females

10180

F18-39

10180

40K→25.2M

24.9 - 25.2 mi

Top 88%
×1story
+13ft-16ft

Overall

23323

Females

9836

F18-39

9836

25.2M→Finish

25.2 - 26.2 mi

Top 83%
×2story building
+22ft-21ft

Overall

22189

Females

9223

F18-39

9223

Passing Analysis

Category:
Athletes Passed
915
Passed By
4283
Net Change
-3368
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19006
5K → 10K500261+239#19006#18767
10K → 15K118279-161#18767#18928
15K → 20K211191-1170#18928#20098
20K → Half2260-258#20098#20356
Half → 25K41084-1080#20356#21436
25K → 30K29642-613#21436#22049
30K → 20M51103-52#22049#22101
20M → 21M19165-146#22101#22247
21M → 35K1858-40#22247#22287
35K → 23M6636+30#22287#22257
23M → 24M3455-21#22257#22278
24M → 40K1799-82#22278#22360
40K → 25.2M1031-21#22360#22381
25.2M → Finish2619+7#22381#22374
TOTALS9154283-3368
📊

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