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BOSTON MARATHON 2023

Stephanie Ito

Bib: 25717•F

IL

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F45-49)
#0 / 1817
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
9:42/mi
30:08
↑ 97↓ 3451.5%
10K· 6.21 mi
9:20/mi
59:08
↑ 79↓ 1380.4%
15K· 9.32 mi
9:37/mi
1:29:02
↑ 67↓ 78
20K· 12.43 mi
9:26/mi
1:58:20
↑ 106↓ 860.1%
Half· 13.11 mi
9:35/mi
2:04:52
↑ 19↓ 370.5%
25K· 15.53 mi
10:58/mi
2:31:28
↑ 66↓ 880.2%
30K· 18.64 mi
10:58/mi
3:05:32
↑ 181↓ 1480.2%
20M
10:42/mi
3:20:04
↑ 64↓ 500.2%
21M
11:08/mi
3:31:12
↑ 106↓ 241.6%
35K· 21.75 mi
10:47/mi
3:39:16
↑ 17↓ 861.7%
23M
10:09/mi
3:51:59
↑ 23↓ 630.6%
24M
11:20/mi
4:03:19
↓ 821.3%
40K· 24.85 mi
12:19/mi
4:13:51
↓ 200.3%
25.2M
13:26/mi
4:18:29
↑ 13↓ 160.2%
Finish· 26.22 mi
9:52/mi
4:28:32
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:04:52
Pace9:31 /mi
2nd Half
Distance13.11 mi
Time2:23:40
Pace10:58 /mi
📊Positive Split: 15.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:46:2630:089:4230:08
9:42
-
10K
6.21 mi12:15:2659:089:3129:00
9:20
-0:22
15K
9.32 mi12:45:201:29:029:3329:54
9:37
+0:17
20K
12.43 mi13:14:381:58:209:3129:18
9:26
-0:11
Half
13.11 mi13:21:102:04:529:316:32
9:35
+0:09
25K
15.53 mi13:47:462:31:289:4526:36
10:58
+1:23
30K
18.64 mi14:21:503:05:329:5734:04
10:58
0:00
20M
20.00 mi14:36:223:20:0410:0014:32
10:42
-0:16
21M
21.00 mi14:47:303:31:1210:0311:08
11:08
+0:26
35K
21.75 mi14:55:343:39:1610:058:04
10:47
-0:21
23M
23.00 mi15:08:173:51:5910:0512:43
10:09
-0:38
24M
24.00 mi15:19:374:03:1910:0811:20
11:20
+1:11
40K
24.85 mi15:30:094:13:5110:1310:32
12:19
+0:59
25.2M
25.20 mi15:34:474:18:2910:154:38
13:26
+1:07
Finish
26.22 mi15:44:504:28:3210:1510:03
9:52
-3:34

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

9:20 /mi

Average Pace

10:15 /mi

Slowest Pace

13:26 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:14:55

50% of race

Time at Steady Pace

1:47:07

40% of race

Time at Slower Pace

26:30

10% of race

Average Pace: 10:14 /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 mi11:46:2630:089:4230:08
9:42
#22659
10K
6.21 mi12:15:2659:089:3129:00
9:20
#22372
15K
9.32 mi12:45:201:29:029:3329:54
9:37
#22466
20K
12.43 mi13:14:381:58:209:3129:18
9:26
#22189
Half
13.11 mi13:21:102:04:529:316:32
9:35
#22188
25K
15.53 mi13:47:462:31:289:4526:36
10:58
#22580
30K
18.64 mi14:21:503:05:329:5734:04
10:58
#22708
20M
20.00 mi14:36:223:20:0410:0014:32
10:42
#22644
21M
21.00 mi14:47:303:31:1210:0311:08
11:08
#22564
35K
21.75 mi14:55:343:39:1610:058:04
10:47
#22562
23M
23.00 mi15:08:173:51:5910:0512:43
10:09
#22456
24M
24.00 mi15:19:374:03:1910:0811:20
11:20
#22511
40K
24.85 mi15:30:094:13:5110:1310:32
12:19
#22609
25.2M
25.20 mi15:34:474:18:2910:154:38
13:26
#22649
Finish
26.22 mi15:44:504:28:3210:1510:03
9:52
#22602
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi226599212921222590(Top 85%)9125(Top 80%)9125(Top 502%)
10K6.21 mi3.10 mi22372+2879034+1789034+17822035(Top 83%)8835(Top 77%)8835(Top 486%)
15K9.32 mi3.11 mi22466-949074-409074-4022590(Top 85%)9125(Top 80%)9125(Top 502%)
20K12.43 mi3.11 mi22189+2778931+1438931+14321337(Top 80%)8427(Top 74%)8427(Top 464%)
Half13.11 mi0.68 mi22188+18932-18932-122344(Top 84%)8979(Top 79%)8979(Top 494%)
25K15.53 mi2.42 mi22580-3929146-2149146-21423927(Top 90%)9913(Top 87%)9913(Top 546%)
30K18.64 mi3.11 mi22708-1289237-919237-9123034(Top 87%)9475(Top 83%)9475(Top 521%)
20M20.00 mi1.36 mi22644+649216+219216+2122149(Top 83%)9065(Top 79%)9065(Top 499%)
21M21.00 mi1.00 mi22564+809174+429174+4221119(Top 79%)8526(Top 75%)8526(Top 469%)
35K21.75 mi0.75 mi22562+29178-49178-422897(Top 86%)9539(Top 84%)9539(Top 525%)
23M23.00 mi1.25 mi22456+1069130+489130+4820469(Top 77%)8217(Top 72%)8217(Top 452%)
24M24.00 mi1.00 mi22511-559169-399169-3923647(Top 89%)9973(Top 87%)9973(Top 549%)
40K24.85 mi0.85 mi22609-989233-649233-6424251(Top 91%)10308(Top 90%)10308(Top 567%)
25.2M25.20 mi0.35 mi22649-409259-269259-2624460(Top 92%)10409(Top 91%)10409(Top 573%)
Finish26.22 mi1.02 mi22602+479241+189241+1821371(Top 80%)8764(Top 77%)8764(Top 482%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 85%
×21story building
+97ft-345ft

Overall

22590

Females

9125

F45-49

9125

5K→10K

3.1 - 6.2 mi

Top 83%
×5story building
+79ft-138ft

Overall

22035

Females

8835

F45-49

8835

10K→15K

6.2 - 9.3 mi

Top 85%
×3story building
+67ft-78ft

Overall

22590

Females

9125

F45-49

9125

15K→20K

9.3 - 12.4 mi

Top 80%
×5story building
+106ft-86ft

Overall

21337

Females

8427

F45-49

8427

20K→Half

12.4 - 13.1 mi

Top 84%
×2story building
+19ft-37ft

Overall

22344

Females

8979

F45-49

8979

Half→25K

13.1 - 15.5 mi

Top 90%
×4story building
+66ft-88ft

Overall

23927

Females

9913

F45-49

9913

25K→30K

15.5 - 18.6 mi

Top 87%
×9story building
+181ft-148ft

Overall

23034

Females

9475

F45-49

9475

30K→20M

18.6 - 20.0 mi

Top 83%
×5story building
+64ft-50ft

Overall

22149

Females

9065

F45-49

9065

20M→21M

20.0 - 21.0 mi

Top 79%
×8story building
+106ft-24ft

Overall

21119

Females

8526

F45-49

8526

21M→35K

21.0 - 21.8 mi

Top 86%
×7story building
+17ft-86ft

Overall

22897

Females

9539

F45-49

9539

35K→23M

21.8 - 23.0 mi

Top 77%
×5story building
+23ft-63ft

Overall

20469

Females

8217

F45-49

8217

23M→24M

23.0 - 24.0 mi

Top 89%
×6story building
+12ft-82ft

Overall

23647

Females

9973

F45-49

9973

24M→40K

24.0 - 24.9 mi

Top 91%
×1story
+6ft-20ft

Overall

24251

Females

10308

F45-49

10308

40K→25.2M

24.9 - 25.2 mi

Top 92%
×1story
+13ft-16ft

Overall

24460

Females

10409

F45-49

10409

25.2M→Finish

25.2 - 26.2 mi

Top 80%
×2story building
+22ft-21ft

Overall

21371

Females

8764

F45-49

8764

Passing Analysis

Category:
Athletes Passed
1393
Passed By
1336
Net Change
+57
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22659
5K → 10K404117+287#22659#22372
10K → 15K119213-94#22372#22466
15K → 20K30629+277#22466#22189
20K → Half2625+1#22189#22188
Half → 25K24416-392#22188#22580
25K → 30K77205-128#22580#22708
30K → 20M9026+64#22708#22644
20M → 21M9919+80#22644#22564
21M → 35K3735+2#22564#22562
35K → 23M11610+106#22562#22456
23M → 24M1974-55#22456#22511
24M → 40K9107-98#22511#22609
40K → 25.2M848-40#22609#22649
25.2M → Finish5912+47#22649#22602
TOTALS13931336+57
📊

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