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BOSTON MARATHON 2023

Reiko Kobayashi

Bib: 23824•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F60-64)
#0 / 527
Top 27%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:53
Rank: #20338
Start → 5K
8:58/mi
27:53 split
10K· 6.21 mi
55:45
Rank: #20535 (-197)
5K → 10K
8:58/mi
27:52 split
15K· 9.32 mi
1:23:43
Rank: #20490 (+45)
10K → 15K
9:00/mi
27:58 split
20K· 12.43 mi
1:52:00
Rank: #20422 (+68)
15K → 20K
9:06/mi
28:17 split
Half· 13.11 mi
1:58:11
Rank: #20441 (-19)
20K → Half
9:04/mi
6:11 split
25K· 15.53 mi
2:20:26
Rank: #20325 (+116)
Half → 25K
9:11/mi
22:15 split
30K· 18.64 mi
2:49:52
Rank: #20115 (+210)
25K → 30K
9:28/mi
29:26 split
20M
3:02:37
Rank: #19964 (+151)
30K → 20M
9:23/mi
12:45 split
21M
3:13:00
Rank: #19906 (+58)
20M → 21M
10:23/mi
10:23 split
35K· 21.75 mi
3:19:57
Rank: #19875 (+31)
21M → 35K
9:17/mi
6:57 split
23M
3:31:28
Rank: #19718 (+157)
35K → 23M
9:12/mi
11:31 split
24M
3:40:20
Rank: #19585 (+133)
23M → 24M
8:52/mi
8:52 split
40K· 24.85 mi
3:47:56
Rank: #19460 (+125)
24M → 40K
8:53/mi
7:36 split
25.2M
3:51:11
Rank: #19406 (+54)
40K → 25.2M
9:25/mi
3:15 split
Finish· 26.22 mi
4:00:05
Rank: #19331 (+75)
25.2M → Finish
8:44/mi
8:54 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:58:11
Pace9:01 /mi
2nd Half
Distance13.11 mi
Time2:01:54
Pace9:18 /mi
📊Positive Split: 3.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:22:4127:538:5827:53
8:58
-
10K
6.21 mi11:50:3355:458:5827:52
8:58
0:00
15K
9.32 mi12:18:311:23:438:5927:58
9:00
+0:02
20K
12.43 mi12:46:481:52:009:0128:17
9:06
+0:06
Half
13.11 mi12:52:591:58:119:016:11
9:04
-0:02
25K
15.53 mi13:15:142:20:269:0222:15
9:11
+0:07
30K
18.64 mi13:44:402:49:529:0729:26
9:28
+0:17
20M
20.00 mi13:57:253:02:379:0812:45
9:23
-0:05
21M
21.00 mi14:07:483:13:009:1110:23
10:23
+1:00
35K
21.75 mi14:14:453:19:579:126:57
9:17
-1:06
23M
23.00 mi14:26:163:31:289:1211:31
9:12
-0:05
24M
24.00 mi14:35:083:40:209:118:52
8:52
-0:20
40K
24.85 mi14:42:443:47:569:107:36
8:53
+0:01
25.2M
25.20 mi14:45:593:51:119:103:15
9:25
+0:32
Finish
26.22 mi14:54:534:00:059:108:54
8:44
-0:41

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

8:44 /mi

Average Pace

9:10 /mi

Slowest Pace

10:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:49:42

96% of race

Time at Steady Pace

0:00

0% of race

Time at Slower Pace

10:23

4% of race

Average Pace: 9:09 /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 mi11:22:4127:538:5827:53
8:58
#20338
10K
6.21 mi11:50:3355:458:5827:52
8:58
#20535
15K
9.32 mi12:18:311:23:438:5927:58
9:00
#20490
20K
12.43 mi12:46:481:52:009:0128:17
9:06
#20422
Half
13.11 mi12:52:591:58:119:016:11
9:04
#20441
25K
15.53 mi13:15:142:20:269:0222:15
9:11
#20325
30K
18.64 mi13:44:402:49:529:0729:26
9:28
#20115
20M
20.00 mi13:57:253:02:379:0812:45
9:23
#19964
21M
21.00 mi14:07:483:13:009:1110:23
10:23
#19906
35K
21.75 mi14:14:453:19:579:126:57
9:17
#19875
23M
23.00 mi14:26:163:31:289:1211:31
9:12
#19718
24M
24.00 mi14:35:083:40:209:118:52
8:52
#19585
40K
24.85 mi14:42:443:47:569:107:36
8:53
#19460
25.2M
25.20 mi14:45:593:51:119:103:15
9:25
#19406
Finish
26.22 mi14:54:534:00:059:108:54
8:44
#19331
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF60-64Seg. OverallSeg. FemalesSeg. F60-64
5K3.11 mi3.11 mi203388017801720517(Top 77%)7965(Top 70%)7965(Top 1511%)
10K6.21 mi3.10 mi20535-1978053-368053-3620752(Top 78%)8119(Top 71%)8119(Top 1541%)
15K9.32 mi3.11 mi20490+458010+438010+4320517(Top 77%)7965(Top 70%)7965(Top 1511%)
20K12.43 mi3.11 mi20422+687958+527958+5220160(Top 76%)7753(Top 68%)7753(Top 1471%)
Half13.11 mi0.68 mi20441-197964-67964-620700(Top 78%)8062(Top 71%)8062(Top 1530%)
25K15.53 mi2.42 mi20325+1167888+767888+7619742(Top 74%)7554(Top 66%)7554(Top 1433%)
30K18.64 mi3.11 mi20115+2107790+987790+9819341(Top 73%)7387(Top 65%)7387(Top 1402%)
20M20.00 mi1.36 mi19964+1517720+707720+7018412(Top 69%)6980(Top 61%)6980(Top 1324%)
21M21.00 mi1.00 mi19906+587689+317689+3119237(Top 72%)7485(Top 66%)7485(Top 1420%)
35K21.75 mi0.75 mi19875+317683+67683+619130(Top 72%)7460(Top 65%)7460(Top 1416%)
23M23.00 mi1.25 mi19718+1577596+877596+8717079(Top 64%)6341(Top 56%)6341(Top 1203%)
24M24.00 mi1.00 mi19585+1337532+647532+6416634(Top 62%)6164(Top 54%)6164(Top 1170%)
40K24.85 mi0.85 mi19460+1257468+647468+6415609(Top 59%)5654(Top 49%)5654(Top 1073%)
25.2M25.20 mi0.35 mi19406+547432+367432+3614935(Top 56%)5293(Top 46%)5293(Top 1004%)
Finish26.22 mi1.02 mi19331+757399+337399+3316703(Top 63%)6216(Top 54%)6216(Top 1180%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 77%
×21story building
+97ft-345ft

Overall

20517

Females

7965

F60-64

7965

5K→10K

3.1 - 6.2 mi

Top 78%
×5story building
+79ft-138ft

Overall

20752

Females

8119

F60-64

8119

10K→15K

6.2 - 9.3 mi

Top 77%
×3story building
+67ft-78ft

Overall

20517

Females

7965

F60-64

7965

15K→20K

9.3 - 12.4 mi

Top 76%
×5story building
+106ft-86ft

Overall

20160

Females

7753

F60-64

7753

20K→Half

12.4 - 13.1 mi

Top 78%
×2story building
+19ft-37ft

Overall

20700

Females

8062

F60-64

8062

Half→25K

13.1 - 15.5 mi

Top 74%
×4story building
+66ft-88ft

Overall

19742

Females

7554

F60-64

7554

25K→30K

15.5 - 18.6 mi

Top 73%
×9story building
+181ft-148ft

Overall

19341

Females

7387

F60-64

7387

30K→20M

18.6 - 20.0 mi

Top 69%
×5story building
+64ft-50ft

Overall

18412

Females

6980

F60-64

6980

20M→21M

20.0 - 21.0 mi

Top 72%
×8story building
+106ft-24ft

Overall

19237

Females

7485

F60-64

7485

21M→35K

21.0 - 21.8 mi

Top 72%
×7story building
+17ft-86ft

Overall

19130

Females

7460

F60-64

7460

35K→23M

21.8 - 23.0 mi

Top 64%
×5story building
+23ft-63ft

Overall

17079

Females

6341

F60-64

6341

23M→24M

23.0 - 24.0 mi

Top 62%
×6story building
+12ft-82ft

Overall

16634

Females

6164

F60-64

6164

24M→40K

24.0 - 24.9 mi

Top 59%
×1story
+6ft-20ft

Overall

15609

Females

5654

F60-64

5654

40K→25.2M

24.9 - 25.2 mi

Top 56%
×1story
+13ft-16ft

Overall

14935

Females

5293

F60-64

5293

25.2M→Finish

25.2 - 26.2 mi

Top 63%
×2story building
+22ft-21ft

Overall

16703

Females

6216

F60-64

6216

Passing Analysis

Category:
Athletes Passed
1955
Passed By
948
Net Change
+1007
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20338
5K → 10K199396-197#20338#20535
10K → 15K195150+45#20535#20490
15K → 20K192124+68#20490#20422
20K → Half2140-19#20422#20441
Half → 25K17155+116#20441#20325
25K → 30K26050+210#20325#20115
30K → 20M16817+151#20115#19964
20M → 21M11153+58#19964#19906
21M → 35K5221+31#19906#19875
35K → 23M17013+157#19875#19718
23M → 24M1407+133#19718#19585
24M → 40K1261+125#19585#19460
40K → 25.2M551+54#19460#19406
25.2M → Finish9520+75#19406#19331
TOTALS1955948+1007
📊

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