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BOSTON MARATHON 2023

Roberta Kim

Bib: 21583•F

AB

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Top 45%
Division (F50-54)
#0 / 1207
Top 38%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:52
Rank: #18554
Start → 5K
8:39/mi
26:52 split
10K· 6.21 mi
53:18
Rank: #18393 (+161)
5K → 10K
8:30/mi
26:26 split
15K· 9.32 mi
1:19:49
Rank: #18253 (+140)
10K → 15K
8:32/mi
26:31 split
20K· 12.43 mi
1:48:29
Rank: #18953 (-700)
15K → 20K
9:14/mi
28:40 split
Half· 13.11 mi
1:54:22
Rank: #18941 (+12)
20K → Half
8:37/mi
5:53 split
25K· 15.53 mi
2:15:53
Rank: #18836 (+105)
Half → 25K
8:52/mi
21:31 split
30K· 18.64 mi
2:44:31
Rank: #18718 (+118)
25K → 30K
9:13/mi
28:38 split
20M
2:56:31
Rank: #18473 (+245)
30K → 20M
8:50/mi
12:00 split
21M
3:05:30
Rank: #18180 (+293)
20M → 21M
8:59/mi
8:59 split
35K· 21.75 mi
3:11:43
Rank: #18030 (+150)
21M → 35K
8:19/mi
6:13 split
23M
3:22:32
Rank: #17817 (+213)
35K → 23M
8:38/mi
10:49 split
24M
3:31:00
Rank: #17659 (+158)
23M → 24M
8:28/mi
8:28 split
40K· 24.85 mi
3:38:12
Rank: #17475 (+184)
24M → 40K
8:25/mi
7:12 split
25.2M
3:41:12
Rank: #17368 (+107)
40K → 25.2M
8:42/mi
3:00 split
Finish· 26.22 mi
3:48:50
Rank: #17066 (+302)
25.2M → Finish
7:29/mi
7:38 split

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:54:22
Pace8:43 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:54:28
Pace8:44 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:4126:528:3926:52
8:39
-
10K
6.21 mi11:46:0753:188:3526:26
8:30
-0:09
15K
9.32 mi12:12:381:19:498:3426:31
8:32
+0:02
20K
12.43 mi12:41:181:48:298:4428:40
9:14
+0:42
Half
13.11 mi12:47:111:54:228:435:53
8:37
-0:37
25K
15.53 mi13:08:422:15:538:4521:31
8:52
+0:15
30K
18.64 mi13:37:202:44:318:5028:38
9:13
+0:21
20M
20.00 mi13:49:202:56:318:5012:00
8:50
-0:23
21M
21.00 mi13:58:193:05:308:508:59
8:59
+0:09
35K
21.75 mi14:04:323:11:438:496:13
8:19
-0:40
23M
23.00 mi14:15:213:22:328:4810:49
8:38
+0:19
24M
24.00 mi14:23:493:31:008:488:28
8:28
-0:10
40K
24.85 mi14:31:013:38:128:477:12
8:25
-0:03
25.2M
25.20 mi14:34:013:41:128:473:00
8:42
+0:17
Finish
26.22 mi14:41:393:48:508:447:38
7:29
-1:13

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

7:29 /mi

Average Pace

8:44 /mi

Slowest Pace

9:14 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

21:03

9% of race

Time at Steady Pace

1:59:59

52% of race

Time at Slower Pace

1:27:48

38% of race

Average Pace: 8:44 /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 mi11:19:4126:528:3926:52
8:39
#18554
10K
6.21 mi11:46:0753:188:3526:26
8:30
#18393
15K
9.32 mi12:12:381:19:498:3426:31
8:32
#18253
20K
12.43 mi12:41:181:48:298:4428:40
9:14
#18953
Half
13.11 mi12:47:111:54:228:435:53
8:37
#18941
25K
15.53 mi13:08:422:15:538:4521:31
8:52
#18836
30K
18.64 mi13:37:202:44:318:5028:38
9:13
#18718
20M
20.00 mi13:49:202:56:318:5012:00
8:50
#18473
21M
21.00 mi13:58:193:05:308:508:59
8:59
#18180
35K
21.75 mi14:04:323:11:438:496:13
8:19
#18030
23M
23.00 mi14:15:213:22:328:4810:49
8:38
#17817
24M
24.00 mi14:23:493:31:008:488:28
8:28
#17659
40K
24.85 mi14:31:013:38:128:477:12
8:25
#17475
25.2M
25.20 mi14:34:013:41:128:473:00
8:42
#17368
Finish
26.22 mi14:41:393:48:508:447:38
7:29
#17066
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi185546905690518048(Top 68%)6528(Top 57%)6528(Top 541%)
10K6.21 mi3.10 mi18393+1616755+1506755+15018314(Top 69%)6666(Top 58%)6666(Top 552%)
15K9.32 mi3.11 mi18253+1406666+896666+8918048(Top 68%)6528(Top 57%)6528(Top 541%)
20K12.43 mi3.11 mi18953-7007093-4277093-42720683(Top 78%)8046(Top 70%)8046(Top 667%)
Half13.11 mi0.68 mi18941+127085+87085+818480(Top 69%)6757(Top 59%)6757(Top 560%)
25K15.53 mi2.42 mi18836+1057028+577028+5718337(Top 69%)6746(Top 59%)6746(Top 559%)
30K18.64 mi3.11 mi18718+1186983+456983+4518238(Top 69%)6784(Top 59%)6784(Top 562%)
20M20.00 mi1.36 mi18473+2456852+1316852+13115635(Top 59%)5357(Top 47%)5357(Top 444%)
21M21.00 mi1.00 mi18180+2936708+1446708+14413361(Top 50%)4148(Top 36%)4148(Top 344%)
35K21.75 mi0.75 mi18030+1506616+926616+9214218(Top 53%)4698(Top 41%)4698(Top 389%)
23M23.00 mi1.25 mi17817+2136510+1066510+10614057(Top 53%)4658(Top 41%)4658(Top 386%)
24M24.00 mi1.00 mi17659+1586430+806430+8014327(Top 54%)4868(Top 43%)4868(Top 403%)
40K24.85 mi0.85 mi17475+1846326+1046326+10412898(Top 48%)4171(Top 37%)4171(Top 346%)
25.2M25.20 mi0.35 mi17368+1076278+486278+4810893(Top 41%)3167(Top 28%)3167(Top 262%)
Finish26.22 mi1.02 mi17066+3026113+1656113+1658538(Top 32%)2059(Top 18%)2059(Top 171%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 68%
×21story building
+97ft-345ft

Overall

18048

Females

6528

F50-54

6528

5K→10K

3.1 - 6.2 mi

Top 69%
×5story building
+79ft-138ft

Overall

18314

Females

6666

F50-54

6666

10K→15K

6.2 - 9.3 mi

Top 68%
×3story building
+67ft-78ft

Overall

18048

Females

6528

F50-54

6528

15K→20K

9.3 - 12.4 mi

Top 78%
×5story building
+106ft-86ft

Overall

20683

Females

8046

F50-54

8046

20K→Half

12.4 - 13.1 mi

Top 69%
×2story building
+19ft-37ft

Overall

18480

Females

6757

F50-54

6757

Half→25K

13.1 - 15.5 mi

Top 69%
×4story building
+66ft-88ft

Overall

18337

Females

6746

F50-54

6746

25K→30K

15.5 - 18.6 mi

Top 69%
×9story building
+181ft-148ft

Overall

18238

Females

6784

F50-54

6784

30K→20M

18.6 - 20.0 mi

Top 59%
×5story building
+64ft-50ft

Overall

15635

Females

5357

F50-54

5357

20M→21M

20.0 - 21.0 mi

Top 50%
×8story building
+106ft-24ft

Overall

13361

Females

4148

F50-54

4148

21M→35K

21.0 - 21.8 mi

Top 53%
×7story building
+17ft-86ft

Overall

14218

Females

4698

F50-54

4698

35K→23M

21.8 - 23.0 mi

Top 53%
×5story building
+23ft-63ft

Overall

14057

Females

4658

F50-54

4658

23M→24M

23.0 - 24.0 mi

Top 54%
×6story building
+12ft-82ft

Overall

14327

Females

4868

F50-54

4868

24M→40K

24.0 - 24.9 mi

Top 48%
×1story
+6ft-20ft

Overall

12898

Females

4171

F50-54

4171

40K→25.2M

24.9 - 25.2 mi

Top 41%
×1story
+13ft-16ft

Overall

10893

Females

3167

F50-54

3167

25.2M→Finish

25.2 - 26.2 mi

Top 32%
×2story building
+22ft-21ft

Overall

8538

Females

2059

F50-54

2059

Passing Analysis

Category:
Athletes Passed
2829
Passed By
1341
Net Change
+1488
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18554
5K → 10K428267+161#18554#18393
10K → 15K253113+140#18393#18253
15K → 20K33733-700#18253#18953
20K → Half4028+12#18953#18941
Half → 25K16964+105#18941#18836
25K → 30K221103+118#18836#18718
30K → 20M2516+245#18718#18473
20M → 21M2952+293#18473#18180
21M → 35K1522+150#18180#18030
35K → 23M2218+213#18030#17817
23M → 24M1657+158#17817#17659
24M → 40K1906+184#17659#17475
40K → 25.2M1070+107#17475#17368
25.2M → Finish3042+302#17368#17066
TOTALS28291341+1488
📊

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