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BOSTON MARATHON 2023

Molly Klein

Bib: 12141•F

CA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 9%
Gender (Female)
#0 / 11423
Top 0.9%
Division (F18-39)
#0 / 4884
Top 2%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:15
Rank: #5073
Start → 5K
21:15 | 6:50/mi
10K· 6.21 mi
42:30
Rank: #5324 (-251)
5K → 10K
21:15 | 6:50/mi
15K· 9.32 mi
1:03:20
Rank: #4963 (+361)
10K → 15K
20:50 | 6:42/mi
20K· 12.43 mi
1:23:58
Rank: #4418 (+545)
15K → 20K
20:38 | 6:38/mi
Half· 13.11 mi
1:28:20
Rank: #4256 (+162)
20K → Half
4:22 | 6:24/mi
25K· 15.53 mi
1:44:07
Rank: #3797 (+459)
Half → 25K
15:47 | 6:31/mi
30K· 18.64 mi
2:04:32
Rank: #3291 (+506)
25K → 30K
20:25 | 6:34/mi
20M
2:13:19
Rank: #3046 (+245)
30K → 20M
8:47 | 6:28/mi
21M
2:20:02
Rank: #2870 (+176)
20M → 21M
6:43 | 6:43/mi
35K· 21.75 mi
2:24:47
Rank: #2792 (+78)
21M → 35K
4:45 | 6:21/mi
23M
2:32:55
Rank: #2643 (+149)
35K → 23M
8:08 | 6:30/mi
24M
2:39:14
Rank: #2537 (+106)
23M → 24M
6:19 | 6:19/mi
40K· 24.85 mi
2:44:47
Rank: #2466 (+71)
24M → 40K
5:33 | 6:29/mi
25.2M
2:47:10
Rank: #2437 (+29)
40K → 25.2M
2:23 | 6:55/mi
Finish· 26.22 mi
2:53:37
Rank: #2394 (+43)
25.2M → Finish
6:27 | 6:20/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:28:20
Pace6:44 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:25:17
Pace6:30 /mi
📊Negative Split: 3.5% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:48:4521:156:5021:15
6:50
-
10K
6.21 mi11:10:0042:306:5021:15
6:50
0:00
15K
9.32 mi11:30:501:03:206:4820:50
6:42
-0:08
20K
12.43 mi11:51:281:23:586:4520:38
6:38
-0:04
Half
13.11 mi11:55:501:28:206:444:22
6:24
-0:14
25K
15.53 mi12:11:371:44:076:4215:47
6:31
+0:07
30K
18.64 mi12:32:022:04:326:4120:25
6:34
+0:03
20M
20.00 mi12:40:492:13:196:408:47
6:28
-0:06
21M
21.00 mi12:47:322:20:026:406:43
6:43
+0:15
35K
21.75 mi12:52:172:24:476:394:45
6:21
-0:22
23M
23.00 mi13:00:252:32:556:398:08
6:30
+0:09
24M
24.00 mi13:06:442:39:146:386:19
6:19
-0:11
40K
24.85 mi13:12:172:44:476:385:33
6:29
+0:10
25.2M
25.20 mi13:14:402:47:106:382:23
6:55
+0:26
Finish
26.22 mi13:21:072:53:376:386:27
6:20
-0:35

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

6:19 /mi

Average Pace

6:38 /mi

Slowest Pace

6:55 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:20:33

46% of race

Time at Steady Pace

1:33:04

54% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:37 /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 mi10:48:4521:156:5021:15
6:50
#5073
10K
6.21 mi11:10:0042:306:5021:15
6:50
#5324
15K
9.32 mi11:30:501:03:206:4820:50
6:42
#4963
20K
12.43 mi11:51:281:23:586:4520:38
6:38
#4418
Half
13.11 mi11:55:501:28:206:444:22
6:24
#4256
25K
15.53 mi12:11:371:44:076:4215:47
6:31
#3797
30K
18.64 mi12:32:022:04:326:4120:25
6:34
#3291
20M
20.00 mi12:40:492:13:196:408:47
6:28
#3046
21M
21.00 mi12:47:322:20:026:406:43
6:43
#2870
35K
21.75 mi12:52:172:24:476:394:45
6:21
#2792
23M
23.00 mi13:00:252:32:556:398:08
6:30
#2643
24M
24.00 mi13:06:442:39:146:386:19
6:19
#2537
40K
24.85 mi13:12:172:44:476:385:33
6:29
#2466
25.2M
25.20 mi13:14:402:47:106:382:23
6:55
#2437
Finish
26.22 mi13:21:072:53:376:386:27
6:20
#2394
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi50733613614211(Top 16%)254(Top 2%)254(Top 5%)
10K6.21 mi3.10 mi5324-251394-33394-335667(Top 21%)460(Top 4%)460(Top 9%)
15K9.32 mi3.11 mi4963+361348+46348+464211(Top 16%)254(Top 2%)254(Top 5%)
20K12.43 mi3.11 mi4418+545281+67281+673127(Top 12%)152(Top 1%)152(Top 3%)
Half13.11 mi0.68 mi4256+162265+16265+162285(Top 9%)93(Top 0.8%)93(Top 2%)
25K15.53 mi2.42 mi3797+459206+59206+592228(Top 8%)90(Top 0.8%)90(Top 2%)
30K18.64 mi3.11 mi3291+506160+46160+461853(Top 7%)78(Top 0.7%)78(Top 2%)
20M20.00 mi1.36 mi3046+245142+18142+181334(Top 5%)63(Top 0.6%)63(Top 1%)
21M21.00 mi1.00 mi2870+176127+15127+151163(Top 4%)56(Top 0.5%)56(Top 1%)
35K21.75 mi0.75 mi2792+78122+5122+51798(Top 7%)89(Top 0.8%)89(Top 2%)
23M23.00 mi1.25 mi2643+149115+7115+71426(Top 5%)72(Top 0.6%)72(Top 1%)
24M24.00 mi1.00 mi2537+106111+4111+41410(Top 5%)76(Top 0.7%)76(Top 2%)
40K24.85 mi0.85 mi2466+71108+3108+31534(Top 6%)88(Top 0.8%)88(Top 2%)
25.2M25.20 mi0.35 mi2437+29107+1107+11540(Top 6%)89(Top 0.8%)89(Top 2%)
Finish26.22 mi1.02 mi2394+431071071764(Top 7%)105(Top 0.9%)105(Top 2%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 16%
×21stories
+97ft-345ft

Overall

4211

Females

254

F18-39

254

5K→10K

3.1 - 6.2 mi

Top 21%
×5stories
+79ft-138ft

Overall

5667

Females

460

F18-39

460

10K→15K

6.2 - 9.3 mi

Top 16%
×3stories
+67ft-78ft

Overall

4211

Females

254

F18-39

254

15K→20K

9.3 - 12.4 mi

Top 12%
×5stories
+106ft-86ft

Overall

3127

Females

152

F18-39

152

20K→Half

12.4 - 13.1 mi

Top 9%
×2stories
+19ft-37ft

Overall

2285

Females

93

F18-39

93

Half→25K

13.1 - 15.5 mi

Top 8%
×4stories
+66ft-88ft

Overall

2228

Females

90

F18-39

90

25K→30K

15.5 - 18.6 mi

Top 7%
×9stories
+181ft-148ft

Overall

1853

Females

78

F18-39

78

30K→20M

18.6 - 20.0 mi

Top 5%
×5stories
+64ft-50ft

Overall

1334

Females

63

F18-39

63

20M→21M

20.0 - 21.0 mi

Top 4%
×8stories
+106ft-24ft

Overall

1163

Females

56

F18-39

56

21M→35K

21.0 - 21.8 mi

Top 7%
×7stories
+17ft-86ft

Overall

1798

Females

89

F18-39

89

35K→23M

21.8 - 23.0 mi

Top 5%
×5stories
+23ft-63ft

Overall

1426

Females

72

F18-39

72

23M→24M

23.0 - 24.0 mi

Top 5%
×6stories
+12ft-82ft

Overall

1410

Females

76

F18-39

76

24M→40K

24.0 - 24.9 mi

Top 6%
×1story
+6ft-20ft

Overall

1534

Females

88

F18-39

88

40K→25.2M

24.9 - 25.2 mi

Top 6%
×1story
+13ft-16ft

Overall

1540

Females

89

F18-39

89

25.2M→Finish

25.2 - 26.2 mi

Top 7%
×2stories
+22ft-21ft

Overall

1764

Females

105

F18-39

105

Passing Analysis

Category:
Athletes Passed
3089
Passed By
410
Net Change
+2679
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5073
5K → 10K107358-251#5073#5324
10K → 15K37817+361#5324#4963
15K → 20K5472+545#4963#4418
20K → Half1620+162#4418#4256
Half → 25K4590+459#4256#3797
25K → 30K5060+506#3797#3291
30K → 20M2461+245#3291#3046
20M → 21M1760+176#3046#2870
21M → 35K824+78#2870#2792
35K → 23M1512+149#2792#2643
23M → 24M1060+106#2643#2537
24M → 40K743+71#2537#2466
40K → 25.2M334+29#2466#2437
25.2M → Finish6219+43#2437#2394
TOTALS3089410+2679
📊

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