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BOSTON MARATHON 2023

Kanako Seno

Bib: 21881•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 49%
Masters (Masters Women)
#0 / 6539
Top 38%
Division (F45-49)
#0 / 1817
Top 45%
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
8:18/mi
25:46
↑ 97↓ 3451.5%
10K· 6.21 mi
8:11/mi
51:13
↑ 79↓ 1380.4%
15K· 9.32 mi
8:14/mi
1:16:49
↑ 67↓ 78
20K· 12.43 mi
8:27/mi
1:43:03
↑ 106↓ 860.1%
Half· 13.11 mi
8:24/mi
1:48:47
↑ 19↓ 370.5%
25K· 15.53 mi
8:37/mi
2:09:41
↑ 66↓ 880.2%
30K· 18.64 mi
9:12/mi
2:38:16
↑ 181↓ 1480.2%
20M
9:08/mi
2:50:41
↑ 64↓ 500.2%
21M
9:26/mi
3:00:07
↑ 106↓ 241.6%
35K· 21.75 mi
8:17/mi
3:06:19
↑ 17↓ 861.7%
23M
8:52/mi
3:17:25
↑ 23↓ 630.6%
24M
8:38/mi
3:26:03
↓ 821.3%
40K· 24.85 mi
8:36/mi
3:33:24
↓ 200.3%
25.2M
9:08/mi
3:36:33
↑ 13↓ 160.2%
Finish· 26.22 mi
8:14/mi
3:44:56
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:48:47
Pace8:18 /mi
2nd Half
Distance13.11 mi
Time1:56:09
Pace8:52 /mi
📊Positive Split: 6.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:4525:468:1825:46
8:18
-
10K
6.21 mi11:44:1251:138:1525:27
8:11
-0:07
15K
9.32 mi12:09:481:16:498:1425:36
8:14
+0:03
20K
12.43 mi12:36:021:43:038:1826:14
8:27
+0:13
Half
13.11 mi12:41:461:48:478:185:44
8:24
-0:03
25K
15.53 mi13:02:402:09:418:2120:54
8:37
+0:13
30K
18.64 mi13:31:152:38:168:2928:35
9:12
+0:35
20M
20.00 mi13:43:402:50:418:3212:25
9:08
-0:04
21M
21.00 mi13:53:063:00:078:359:26
9:26
+0:18
35K
21.75 mi13:59:183:06:198:346:12
8:17
-1:09
23M
23.00 mi14:10:243:17:258:3511:06
8:52
+0:35
24M
24.00 mi14:19:023:26:038:358:38
8:38
-0:14
40K
24.85 mi14:26:233:33:248:357:21
8:36
-0:02
25.2M
25.20 mi14:29:323:36:338:363:09
9:08
+0:32
Finish
26.22 mi14:37:553:44:568:358:23
8:14
-0:54

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

8:11 /mi

Average Pace

8:35 /mi

Slowest Pace

9:26 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:51:21

76% of race

Time at Steady Pace

53:35

24% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:35 /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 mi11:18:4525:468:1825:46
8:18
#16107
10K
6.21 mi11:44:1251:138:1525:27
8:11
#16138
15K
9.32 mi12:09:481:16:498:1425:36
8:14
#16129
20K
12.43 mi12:36:021:43:038:1826:14
8:27
#16228
Half
13.11 mi12:41:461:48:478:185:44
8:24
#16267
25K
15.53 mi13:02:402:09:418:2120:54
8:37
#16400
30K
18.64 mi13:31:152:38:168:2928:35
9:12
#16717
20M
20.00 mi13:43:402:50:418:3212:25
9:08
#16743
21M
21.00 mi13:53:063:00:078:359:26
9:26
#16681
35K
21.75 mi13:59:183:06:198:346:12
8:17
#16569
23M
23.00 mi14:10:243:17:258:3511:06
8:52
#16480
24M
24.00 mi14:19:023:26:038:358:38
8:38
#16426
40K
24.85 mi14:26:233:33:248:357:21
8:36
#16292
25.2M
25.20 mi14:29:323:36:338:363:09
9:08
#16241
Finish
26.22 mi14:37:553:44:568:358:23
8:14
#16161
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi161075351535116151(Top 61%)5384(Top 47%)5384(Top 296%)
10K6.21 mi3.10 mi16138-315359-85359-816206(Top 61%)5403(Top 47%)5403(Top 297%)
15K9.32 mi3.11 mi16129+95368-95368-916151(Top 61%)5384(Top 47%)5384(Top 296%)
20K12.43 mi3.11 mi16228-995440-725440-7216512(Top 62%)5656(Top 50%)5656(Top 311%)
Half13.11 mi0.68 mi16267-395468-285468-2817176(Top 65%)5992(Top 52%)5992(Top 330%)
25K15.53 mi2.42 mi16400-1335576-1085576-10816921(Top 64%)5961(Top 52%)5961(Top 328%)
30K18.64 mi3.11 mi16717-3175809-2335809-23318166(Top 68%)6744(Top 59%)6744(Top 371%)
20M20.00 mi1.36 mi16743-265834-255834-2517256(Top 65%)6307(Top 55%)6307(Top 347%)
21M21.00 mi1.00 mi16681+625809+255809+2515669(Top 59%)5440(Top 48%)5440(Top 299%)
35K21.75 mi0.75 mi16569+1125755+545755+5414083(Top 53%)4619(Top 40%)4619(Top 254%)
23M23.00 mi1.25 mi16480+895719+365719+3615376(Top 58%)5385(Top 47%)5385(Top 296%)
24M24.00 mi1.00 mi16426+545708+115708+1115294(Top 57%)5406(Top 47%)5406(Top 298%)
40K24.85 mi0.85 mi16292+1345649+595649+5913978(Top 53%)4741(Top 42%)4741(Top 261%)
25.2M25.20 mi0.35 mi16241+515624+255624+2513366(Top 50%)4437(Top 39%)4437(Top 244%)
Finish26.22 mi1.02 mi16161+805588+365588+3613659(Top 51%)4565(Top 40%)4565(Top 251%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 61%
×21story building
+97ft-345ft

Overall

16151

Females

5384

F45-49

5384

5K→10K

3.1 - 6.2 mi

Top 61%
×5story building
+79ft-138ft

Overall

16206

Females

5403

F45-49

5403

10K→15K

6.2 - 9.3 mi

Top 61%
×3story building
+67ft-78ft

Overall

16151

Females

5384

F45-49

5384

15K→20K

9.3 - 12.4 mi

Top 62%
×5story building
+106ft-86ft

Overall

16512

Females

5656

F45-49

5656

20K→Half

12.4 - 13.1 mi

Top 65%
×2story building
+19ft-37ft

Overall

17176

Females

5992

F45-49

5992

Half→25K

13.1 - 15.5 mi

Top 64%
×4story building
+66ft-88ft

Overall

16921

Females

5961

F45-49

5961

25K→30K

15.5 - 18.6 mi

Top 68%
×9story building
+181ft-148ft

Overall

18166

Females

6744

F45-49

6744

30K→20M

18.6 - 20.0 mi

Top 65%
×5story building
+64ft-50ft

Overall

17256

Females

6307

F45-49

6307

20M→21M

20.0 - 21.0 mi

Top 59%
×8story building
+106ft-24ft

Overall

15669

Females

5440

F45-49

5440

21M→35K

21.0 - 21.8 mi

Top 53%
×7story building
+17ft-86ft

Overall

14083

Females

4619

F45-49

4619

35K→23M

21.8 - 23.0 mi

Top 58%
×5story building
+23ft-63ft

Overall

15376

Females

5385

F45-49

5385

23M→24M

23.0 - 24.0 mi

Top 57%
×6story building
+12ft-82ft

Overall

15294

Females

5406

F45-49

5406

24M→40K

24.0 - 24.9 mi

Top 53%
×1story
+6ft-20ft

Overall

13978

Females

4741

F45-49

4741

40K→25.2M

24.9 - 25.2 mi

Top 50%
×1story
+13ft-16ft

Overall

13366

Females

4437

F45-49

4437

25.2M→Finish

25.2 - 26.2 mi

Top 51%
×2story building
+22ft-21ft

Overall

13659

Females

4565

F45-49

4565

Passing Analysis

Category:
Athletes Passed
1700
Passed By
1754
Net Change
-54
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16107
5K → 10K292323-31#16107#16138
10K → 15K203194+9#16138#16129
15K → 20K137236-99#16129#16228
20K → Half2766-39#16228#16267
Half → 25K95228-133#16267#16400
25K → 30K101418-317#16400#16717
30K → 20M77103-26#16717#16743
20M → 21M11452+62#16743#16681
21M → 35K1197+112#16681#16569
35K → 23M12738+89#16569#16480
23M → 24M9339+54#16480#16426
24M → 40K14915+134#16426#16292
40K → 25.2M576+51#16292#16241
25.2M → Finish10929+80#16241#16161
TOTALS17001754-54
📊

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