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BOSTON MARATHON 2023

Julia Tosin

Bib: 23686•F

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F55-59)
#0 / 815
Top 45%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
28:04
Rank: #20611
Start → 5K
28:04 | 9:02/mi
10K· 6.21 mi
56:02
Rank: #20712 (-101)
5K → 10K
27:58 | 9:00/mi
15K· 9.32 mi
1:23:28
Rank: #20371 (+341)
10K → 15K
27:26 | 8:50/mi
20K· 12.43 mi
1:52:02
Rank: #20429 (-58)
15K → 20K
28:34 | 9:12/mi
Half· 13.11 mi
1:57:54
Rank: #20336 (+93)
20K → Half
5:52 | 8:36/mi
25K· 15.53 mi
2:19:33
Rank: #20041 (+295)
Half → 25K
21:39 | 8:56/mi
30K· 18.64 mi
2:48:25
Rank: #19752 (+289)
25K → 30K
28:52 | 9:17/mi
20M
3:01:14
Rank: #19658 (+94)
30K → 20M
12:49 | 9:26/mi
21M
3:11:32
Rank: #19603 (+55)
20M → 21M
10:18 | 10:18/mi
35K· 21.75 mi
3:18:28
Rank: #19591 (+12)
21M → 35K
6:56 | 9:16/mi
23M
3:30:38
Rank: #19555 (+36)
35K → 23M
12:10 | 9:43/mi
24M
3:39:55
Rank: #19522 (+33)
23M → 24M
9:17 | 9:17/mi
40K· 24.85 mi
3:48:20
Rank: #19524 (-2)
24M → 40K
8:25 | 9:51/mi
25.2M
3:51:51
Rank: #19515 (+9)
40K → 25.2M
3:31 | 10:12/mi
Finish· 26.22 mi
4:01:12
Rank: #19503 (+12)
25.2M → Finish
9:21 | 9:11/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:57:54
Pace9:00 /mi
2nd Half
Distance13.11 mi
Time2:03:18
Pace9:24 /mi
📊Positive Split: 4.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:23:3328:049:0228:04
9:02
-
10K
6.21 mi11:51:3156:029:0127:58
9:00
-0:02
15K
9.32 mi12:18:571:23:288:5727:26
8:50
-0:10
20K
12.43 mi12:47:311:52:029:0128:34
9:12
+0:22
Half
13.11 mi12:53:231:57:549:005:52
8:36
-0:36
25K
15.53 mi13:15:022:19:338:5921:39
8:56
+0:20
30K
18.64 mi13:43:542:48:259:0228:52
9:17
+0:21
20M
20.00 mi13:56:433:01:149:0412:49
9:26
+0:09
21M
21.00 mi14:07:013:11:329:0710:18
10:18
+0:52
35K
21.75 mi14:13:573:18:289:086:56
9:16
-1:02
23M
23.00 mi14:26:073:30:389:0912:10
9:43
+0:27
24M
24.00 mi14:35:243:39:559:109:17
9:17
-0:26
40K
24.85 mi14:43:493:48:209:118:25
9:51
+0:34
25.2M
25.20 mi14:47:203:51:519:123:31
10:12
+0:21
Finish
26.22 mi14:56:414:01:129:129:21
9:11
-1:01

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

8:36 /mi

Average Pace

9:12 /mi

Slowest Pace

10:18 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:26:48

86% of race

Time at Steady Pace

20:35

9% of race

Time at Slower Pace

13:49

6% of race

Average Pace: 9:12 /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 mi11:23:3328:049:0228:04
9:02
#20611
10K
6.21 mi11:51:3156:029:0127:58
9:00
#20712
15K
9.32 mi12:18:571:23:288:5727:26
8:50
#20371
20K
12.43 mi12:47:311:52:029:0128:34
9:12
#20429
Half
13.11 mi12:53:231:57:549:005:52
8:36
#20336
25K
15.53 mi13:15:022:19:338:5921:39
8:56
#20041
30K
18.64 mi13:43:542:48:259:0228:52
9:17
#19752
20M
20.00 mi13:56:433:01:149:0412:49
9:26
#19658
21M
21.00 mi14:07:013:11:329:0710:18
10:18
#19603
35K
21.75 mi14:13:573:18:289:086:56
9:16
#19591
23M
23.00 mi14:26:073:30:389:0912:10
9:43
#19555
24M
24.00 mi14:35:243:39:559:109:17
9:17
#19522
40K
24.85 mi14:43:493:48:209:118:25
9:51
#19524
25.2M
25.20 mi14:47:203:51:519:123:31
10:12
#19515
Finish
26.22 mi14:56:414:01:129:129:21
9:11
#19503
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi206118173817319680(Top 74%)7497(Top 66%)7497(Top 920%)
10K6.21 mi3.10 mi20712-1018153+208153+2020888(Top 78%)8200(Top 72%)8200(Top 1006%)
15K9.32 mi3.11 mi20371+3417943+2107943+21019680(Top 74%)7497(Top 66%)7497(Top 920%)
20K12.43 mi3.11 mi20429-587962-197962-1920551(Top 77%)7984(Top 70%)7984(Top 980%)
Half13.11 mi0.68 mi20336+937904+587904+5818389(Top 69%)6724(Top 59%)6724(Top 825%)
25K15.53 mi2.42 mi20041+2957729+1757729+17518619(Top 70%)6920(Top 61%)6920(Top 849%)
30K18.64 mi3.11 mi19752+2897584+1457584+14518601(Top 70%)6975(Top 61%)6975(Top 856%)
20M20.00 mi1.36 mi19658+947532+527532+5218609(Top 70%)7088(Top 62%)7088(Top 870%)
21M21.00 mi1.00 mi19603+557518+147518+1419038(Top 72%)7365(Top 64%)7365(Top 904%)
35K21.75 mi0.75 mi19591+127516+27516+219047(Top 72%)7417(Top 65%)7417(Top 910%)
23M23.00 mi1.25 mi19555+367499+177499+1719150(Top 72%)7498(Top 66%)7498(Top 920%)
24M24.00 mi1.00 mi19522+337498+17498+118411(Top 69%)7118(Top 62%)7118(Top 873%)
40K24.85 mi0.85 mi19524-27503-57503-519531(Top 73%)7790(Top 68%)7790(Top 956%)
25.2M25.20 mi0.35 mi19515+97503750318163(Top 68%)7043(Top 62%)7043(Top 864%)
Finish26.22 mi1.02 mi19503+127504-17504-118825(Top 71%)7347(Top 64%)7347(Top 901%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 74%
×21stories
+97ft-345ft

Overall

19680

Females

7497

F55-59

7497

5K→10K

3.1 - 6.2 mi

Top 78%
×5stories
+79ft-138ft

Overall

20888

Females

8200

F55-59

8200

10K→15K

6.2 - 9.3 mi

Top 74%
×3stories
+67ft-78ft

Overall

19680

Females

7497

F55-59

7497

15K→20K

9.3 - 12.4 mi

Top 77%
×5stories
+106ft-86ft

Overall

20551

Females

7984

F55-59

7984

20K→Half

12.4 - 13.1 mi

Top 69%
×2stories
+19ft-37ft

Overall

18389

Females

6724

F55-59

6724

Half→25K

13.1 - 15.5 mi

Top 70%
×4stories
+66ft-88ft

Overall

18619

Females

6920

F55-59

6920

25K→30K

15.5 - 18.6 mi

Top 70%
×9stories
+181ft-148ft

Overall

18601

Females

6975

F55-59

6975

30K→20M

18.6 - 20.0 mi

Top 70%
×5stories
+64ft-50ft

Overall

18609

Females

7088

F55-59

7088

20M→21M

20.0 - 21.0 mi

Top 72%
×8stories
+106ft-24ft

Overall

19038

Females

7365

F55-59

7365

21M→35K

21.0 - 21.8 mi

Top 72%
×7stories
+17ft-86ft

Overall

19047

Females

7417

F55-59

7417

35K→23M

21.8 - 23.0 mi

Top 72%
×5stories
+23ft-63ft

Overall

19150

Females

7498

F55-59

7498

23M→24M

23.0 - 24.0 mi

Top 69%
×6stories
+12ft-82ft

Overall

18411

Females

7118

F55-59

7118

24M→40K

24.0 - 24.9 mi

Top 73%
×1story
+6ft-20ft

Overall

19531

Females

7790

F55-59

7790

40K→25.2M

24.9 - 25.2 mi

Top 68%
×1story
+13ft-16ft

Overall

18163

Females

7043

F55-59

7043

25.2M→Finish

25.2 - 26.2 mi

Top 71%
×2stories
+22ft-21ft

Overall

18825

Females

7347

F55-59

7347

Passing Analysis

Category:
Athletes Passed
2076
Passed By
968
Net Change
+1108
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20611
5K → 10K245346-101#20611#20712
10K → 15K39150+341#20712#20371
15K → 20K149207-58#20371#20429
20K → Half941+93#20429#20336
Half → 25K31419+295#20336#20041
25K → 30K32536+289#20041#19752
30K → 20M12733+94#19752#19658
20M → 21M10954+55#19658#19603
21M → 35K4432+12#19603#19591
35K → 23M9054+36#19591#19555
23M → 24M6431+33#19555#19522
24M → 40K4951-2#19522#19524
40K → 25.2M2213+9#19524#19515
25.2M → Finish5341+12#19515#19503
TOTALS2076968+1108
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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