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BOSTON MARATHON 2023

Samantha Tomacchio

Bib: 29041•F

FL

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
9:40/mi
30:01
↑ 97↓ 3451.5%
10K· 6.21 mi
9:38/mi
59:57
↑ 79↓ 1380.4%
15K· 9.32 mi
9:37/mi
1:29:50
↑ 67↓ 78
20K· 12.43 mi
9:37/mi
1:59:43
↑ 106↓ 860.1%
Half· 13.11 mi
9:51/mi
2:06:26
↑ 19↓ 370.5%
25K· 15.53 mi
10:21/mi
2:31:31
↑ 66↓ 880.2%
30K· 18.64 mi
11:34/mi
3:07:26
↑ 181↓ 1480.2%
20M
11:57/mi
3:23:40
↑ 64↓ 500.2%
21M
11:29/mi
3:35:09
↑ 106↓ 241.6%
35K· 21.75 mi
12:26/mi
3:44:27
↑ 17↓ 861.7%
23M
12:32/mi
4:00:09
↑ 23↓ 630.6%
24M
11:45/mi
4:11:54
↓ 821.3%
40K· 24.85 mi
12:27/mi
4:22:33
↓ 200.3%
25.2M
13:26/mi
4:27:11
↑ 13↓ 160.2%
Finish· 26.22 mi
10:25/mi
4:37:48
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:06:26
Pace9:39 /mi
2nd Half
Distance13.11 mi
Time2:31:22
Pace11:33 /mi
📊Positive Split: 19.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:51:4130:019:4030:01
9:40
-
10K
6.21 mi12:21:3759:579:3929:56
9:38
-0:02
15K
9.32 mi12:51:301:29:509:3829:53
9:37
-0:01
20K
12.43 mi13:21:231:59:439:3829:53
9:37
0:00
Half
13.11 mi13:28:062:06:269:396:43
9:51
+0:14
25K
15.53 mi13:53:112:31:319:4525:05
10:21
+0:30
30K
18.64 mi14:29:063:07:2610:0335:55
11:34
+1:13
20M
20.00 mi14:45:203:23:4010:1116:14
11:57
+0:23
21M
21.00 mi14:56:493:35:0910:1511:29
11:29
-0:28
35K
21.75 mi15:06:073:44:2710:199:18
12:26
+0:57
23M
23.00 mi15:21:494:00:0910:2615:42
12:32
+0:06
24M
24.00 mi15:33:344:11:5410:3011:45
11:45
-0:47
40K
24.85 mi15:44:134:22:3310:3410:39
12:27
+0:42
25.2M
25.20 mi15:48:514:27:1110:364:38
13:26
+0:59
Finish
26.22 mi15:59:284:37:4810:3610:37
10:25
-3:01

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

9:37 /mi

Average Pace

10:36 /mi

Slowest Pace

13:26 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:42:08

58% of race

Time at Steady Pace

1:15:23

27% of race

Time at Slower Pace

40:17

15% of race

Average Pace: 10:36 /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 mi11:51:4130:019:4030:01
9:40
#22552
10K
6.21 mi12:21:3759:579:3929:56
9:38
#22751
15K
9.32 mi12:51:301:29:509:3829:53
9:37
#22689
20K
12.43 mi13:21:231:59:439:3829:53
9:37
#22504
Half
13.11 mi13:28:062:06:269:396:43
9:51
#22534
25K
15.53 mi13:53:112:31:319:4525:05
10:21
#22588
30K
18.64 mi14:29:063:07:2610:0335:55
11:34
#22924
20M
20.00 mi14:45:203:23:4010:1116:14
11:57
#23050
21M
21.00 mi14:56:493:35:0910:1511:29
11:29
#22979
35K
21.75 mi15:06:073:44:2710:199:18
12:26
#23106
23M
23.00 mi15:21:494:00:0910:2615:42
12:32
#23225
24M
24.00 mi15:33:344:11:5410:3011:45
11:45
#23282
40K
24.85 mi15:44:134:22:3310:3410:39
12:27
#23346
25.2M
25.20 mi15:48:514:27:1110:364:38
13:26
#23378
Finish
26.22 mi15:59:284:37:4810:3610:37
10:25
#23356
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi225529162916222576(Top 85%)9115(Top 80%)9115(Top 187%)
10K6.21 mi3.10 mi22751-1999226-649226-6422897(Top 86%)9287(Top 81%)9287(Top 190%)
15K9.32 mi3.11 mi22689+629182+449182+4422576(Top 85%)9115(Top 80%)9115(Top 187%)
20K12.43 mi3.11 mi22504+1859091+919091+9121919(Top 82%)8754(Top 77%)8754(Top 179%)
Half13.11 mi0.68 mi22534-309112-219112-2122992(Top 86%)9351(Top 82%)9351(Top 191%)
25K15.53 mi2.42 mi22588-549150-389150-3822923(Top 86%)9349(Top 82%)9349(Top 191%)
30K18.64 mi3.11 mi22924-3369342-1929342-19223946(Top 90%)9985(Top 87%)9985(Top 204%)
20M20.00 mi1.36 mi23050-1269423-819423-8124137(Top 91%)10150(Top 89%)10150(Top 208%)
21M21.00 mi1.00 mi22979+719395+289395+2821865(Top 82%)8926(Top 78%)8926(Top 183%)
35K21.75 mi0.75 mi23106-1279473-789473-7825106(Top 94%)10705(Top 94%)10705(Top 219%)
23M23.00 mi1.25 mi23225-1199537-649537-6424627(Top 93%)10448(Top 91%)10448(Top 214%)
24M24.00 mi1.00 mi23282-579570-339570-3324209(Top 91%)10279(Top 90%)10279(Top 210%)
40K24.85 mi0.85 mi23346-649621-519621-5124396(Top 92%)10388(Top 91%)10388(Top 213%)
25.2M25.20 mi0.35 mi23378-329646-259646-2524464(Top 92%)10413(Top 91%)10413(Top 213%)
Finish26.22 mi1.02 mi23356+229640+69640+622850(Top 86%)9575(Top 84%)9575(Top 196%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 85%
×21story building
+97ft-345ft

Overall

22576

Females

9115

F18-39

9115

5K→10K

3.1 - 6.2 mi

Top 86%
×5story building
+79ft-138ft

Overall

22897

Females

9287

F18-39

9287

10K→15K

6.2 - 9.3 mi

Top 85%
×3story building
+67ft-78ft

Overall

22576

Females

9115

F18-39

9115

15K→20K

9.3 - 12.4 mi

Top 82%
×5story building
+106ft-86ft

Overall

21919

Females

8754

F18-39

8754

20K→Half

12.4 - 13.1 mi

Top 86%
×2story building
+19ft-37ft

Overall

22992

Females

9351

F18-39

9351

Half→25K

13.1 - 15.5 mi

Top 86%
×4story building
+66ft-88ft

Overall

22923

Females

9349

F18-39

9349

25K→30K

15.5 - 18.6 mi

Top 90%
×9story building
+181ft-148ft

Overall

23946

Females

9985

F18-39

9985

30K→20M

18.6 - 20.0 mi

Top 91%
×5story building
+64ft-50ft

Overall

24137

Females

10150

F18-39

10150

20M→21M

20.0 - 21.0 mi

Top 82%
×8story building
+106ft-24ft

Overall

21865

Females

8926

F18-39

8926

21M→35K

21.0 - 21.8 mi

Top 94%
×7story building
+17ft-86ft

Overall

25106

Females

10705

F18-39

10705

35K→23M

21.8 - 23.0 mi

Top 93%
×5story building
+23ft-63ft

Overall

24627

Females

10448

F18-39

10448

23M→24M

23.0 - 24.0 mi

Top 91%
×6story building
+12ft-82ft

Overall

24209

Females

10279

F18-39

10279

24M→40K

24.0 - 24.9 mi

Top 92%
×1story
+6ft-20ft

Overall

24396

Females

10388

F18-39

10388

40K→25.2M

24.9 - 25.2 mi

Top 92%
×1story
+13ft-16ft

Overall

24464

Females

10413

F18-39

10413

25.2M→Finish

25.2 - 26.2 mi

Top 86%
×2story building
+22ft-21ft

Overall

22850

Females

9575

F18-39

9575

Passing Analysis

Category:
Athletes Passed
933
Passed By
1737
Net Change
-804
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22552
5K → 10K156355-199#22552#22751
10K → 15K177115+62#22751#22689
15K → 20K24055+185#22689#22504
20K → Half1444-30#22504#22534
Half → 25K79133-54#22534#22588
25K → 30K36372-336#22588#22924
30K → 20M33159-126#22924#23050
20M → 21M8413+71#23050#22979
21M → 35K9136-127#22979#23106
35K → 23M17136-119#23106#23225
23M → 24M1774-57#23225#23282
24M → 40K1882-64#23282#23346
40K → 25.2M739-32#23346#23378
25.2M → Finish4624+22#23378#23356
TOTALS9331737-804
📊

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