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BOSTON MARATHON 2023

Cori Stern

Bib: 19958•F

MT

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 43%
Masters (Masters Women)
#0 / 6539
Top 30%
Division (F45-49)
#0 / 1817
Top 35%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:02
Rank: #14423
Start → 5K
25:02 | 8:03/mi
10K· 6.21 mi
49:22
Rank: #13960 (+463)
5K → 10K
24:20 | 7:50/mi
15K· 9.32 mi
1:14:45
Rank: #14497 (-537)
10K → 15K
25:23 | 8:10/mi
20K· 12.43 mi
1:39:56
Rank: #14404 (+93)
15K → 20K
25:11 | 8:06/mi
Half· 13.11 mi
1:45:23
Rank: #14408 (-4)
20K → Half
5:27 | 7:59/mi
25K· 15.53 mi
2:04:55
Rank: #14215 (+193)
Half → 25K
19:32 | 8:03/mi
30K· 18.64 mi
2:32:00
Rank: #14482 (-267)
25K → 30K
27:05 | 8:43/mi
20M
2:43:39
Rank: #14434 (+48)
30K → 20M
11:39 | 8:34/mi
21M
2:53:23
Rank: #14601 (-167)
20M → 21M
9:44 | 9:44/mi
35K· 21.75 mi
2:59:38
Rank: #14583 (+18)
21M → 35K
6:15 | 8:21/mi
23M
3:10:52
Rank: #14654 (-71)
35K → 23M
11:14 | 8:58/mi
24M
3:19:47
Rank: #14739 (-85)
23M → 24M
8:55 | 8:55/mi
40K· 24.85 mi
3:27:32
Rank: #14784 (-45)
24M → 40K
7:45 | 9:04/mi
25.2M
3:30:54
Rank: #14799 (-15)
40K → 25.2M
3:22 | 9:46/mi
Finish· 26.22 mi
3:40:01
Rank: #14956 (-157)
25.2M → Finish
9:07 | 8:57/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:45:23
Pace8:02 /mi
2nd Half
Distance13.11 mi
Time1:54:38
Pace8:45 /mi
📊Positive Split: 8.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:0025:028:0325:02
8:03
-
10K
6.21 mi11:41:2049:227:5724:20
7:50
-0:13
15K
9.32 mi12:06:431:14:458:0125:23
8:10
+0:20
20K
12.43 mi12:31:541:39:568:0225:11
8:06
-0:04
Half
13.11 mi12:37:211:45:238:025:27
7:59
-0:07
25K
15.53 mi12:56:532:04:558:0219:32
8:03
+0:04
30K
18.64 mi13:23:582:32:008:0927:05
8:43
+0:40
20M
20.00 mi13:35:372:43:398:1111:39
8:34
-0:09
21M
21.00 mi13:45:212:53:238:159:44
9:44
+1:10
35K
21.75 mi13:51:362:59:388:166:15
8:21
-1:23
23M
23.00 mi14:02:503:10:528:1811:14
8:58
+0:37
24M
24.00 mi14:11:453:19:478:198:55
8:55
-0:03
40K
24.85 mi14:19:303:27:328:217:45
9:04
+0:09
25.2M
25.20 mi14:22:523:30:548:223:22
9:46
+0:42
Finish
26.22 mi14:31:593:40:018:249:07
8:57
-0:49

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

7:50 /mi

Average Pace

8:24 /mi

Slowest Pace

9:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:04:55

57% of race

Time at Steady Pace

44:59

20% of race

Time at Slower Pace

50:07

23% of race

Average Pace: 8:23 /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 mi11:17:0025:028:0325:02
8:03
#14423
10K
6.21 mi11:41:2049:227:5724:20
7:50
#13960
15K
9.32 mi12:06:431:14:458:0125:23
8:10
#14497
20K
12.43 mi12:31:541:39:568:0225:11
8:06
#14404
Half
13.11 mi12:37:211:45:238:025:27
7:59
#14408
25K
15.53 mi12:56:532:04:558:0219:32
8:03
#14215
30K
18.64 mi13:23:582:32:008:0927:05
8:43
#14482
20M
20.00 mi13:35:372:43:398:1111:39
8:34
#14434
21M
21.00 mi13:45:212:53:238:159:44
9:44
#14601
35K
21.75 mi13:51:362:59:388:166:15
8:21
#14583
23M
23.00 mi14:02:503:10:528:1811:14
8:58
#14654
24M
24.00 mi14:11:453:19:478:198:55
8:55
#14739
40K
24.85 mi14:19:303:27:328:217:45
9:04
#14784
25.2M
25.20 mi14:22:523:30:548:223:22
9:46
#14799
Finish
26.22 mi14:31:593:40:018:249:07
8:57
#14956
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi144234287428715660(Top 59%)5086(Top 45%)5086(Top 280%)
10K6.21 mi3.10 mi13960+4634019+2684019+26813427(Top 50%)3677(Top 32%)3677(Top 202%)
15K9.32 mi3.11 mi14497-5374352-3334352-33315660(Top 59%)5086(Top 45%)5086(Top 280%)
20K12.43 mi3.11 mi14404+934317+354317+3514273(Top 54%)4274(Top 37%)4274(Top 235%)
Half13.11 mi0.68 mi14408-44320-34320-314372(Top 54%)4316(Top 38%)4316(Top 238%)
25K15.53 mi2.42 mi14215+1934240+804240+8013222(Top 50%)3765(Top 33%)3765(Top 207%)
30K18.64 mi3.11 mi14482-2674438-1984438-19815606(Top 59%)5276(Top 46%)5276(Top 290%)
20M20.00 mi1.36 mi14434+484439-14439-114111(Top 53%)4483(Top 39%)4483(Top 247%)
21M21.00 mi1.00 mi14601-1674548-1094548-10916983(Top 64%)6176(Top 54%)6176(Top 340%)
35K21.75 mi0.75 mi14583+184555-74555-714474(Top 54%)4826(Top 42%)4826(Top 266%)
23M23.00 mi1.25 mi14654-714623-684623-6815923(Top 60%)5693(Top 50%)5693(Top 313%)
24M24.00 mi1.00 mi14739-854704-814704-8116852(Top 63%)6267(Top 55%)6267(Top 345%)
40K24.85 mi0.85 mi14784-454751-474751-4716491(Top 62%)6121(Top 54%)6121(Top 337%)
25.2M25.20 mi0.35 mi14799-154773-224773-2216395(Top 62%)6089(Top 53%)6089(Top 335%)
Finish26.22 mi1.02 mi14956-1574883-1104883-11017710(Top 67%)6754(Top 59%)6754(Top 372%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 59%
×21stories
+97ft-345ft

Overall

15660

Females

5086

F45-49

5086

5K→10K

3.1 - 6.2 mi

Top 50%
×5stories
+79ft-138ft

Overall

13427

Females

3677

F45-49

3677

10K→15K

6.2 - 9.3 mi

Top 59%
×3stories
+67ft-78ft

Overall

15660

Females

5086

F45-49

5086

15K→20K

9.3 - 12.4 mi

Top 54%
×5stories
+106ft-86ft

Overall

14273

Females

4274

F45-49

4274

20K→Half

12.4 - 13.1 mi

Top 54%
×2stories
+19ft-37ft

Overall

14372

Females

4316

F45-49

4316

Half→25K

13.1 - 15.5 mi

Top 50%
×4stories
+66ft-88ft

Overall

13222

Females

3765

F45-49

3765

25K→30K

15.5 - 18.6 mi

Top 59%
×9stories
+181ft-148ft

Overall

15606

Females

5276

F45-49

5276

30K→20M

18.6 - 20.0 mi

Top 53%
×5stories
+64ft-50ft

Overall

14111

Females

4483

F45-49

4483

20M→21M

20.0 - 21.0 mi

Top 64%
×8stories
+106ft-24ft

Overall

16983

Females

6176

F45-49

6176

21M→35K

21.0 - 21.8 mi

Top 54%
×7stories
+17ft-86ft

Overall

14474

Females

4826

F45-49

4826

35K→23M

21.8 - 23.0 mi

Top 60%
×5stories
+23ft-63ft

Overall

15923

Females

5693

F45-49

5693

23M→24M

23.0 - 24.0 mi

Top 63%
×6stories
+12ft-82ft

Overall

16852

Females

6267

F45-49

6267

24M→40K

24.0 - 24.9 mi

Top 62%
×1story
+6ft-20ft

Overall

16491

Females

6121

F45-49

6121

40K→25.2M

24.9 - 25.2 mi

Top 62%
×1story
+13ft-16ft

Overall

16395

Females

6089

F45-49

6089

25.2M→Finish

25.2 - 26.2 mi

Top 67%
×2stories
+22ft-21ft

Overall

17710

Females

6754

F45-49

6754

Passing Analysis

Category:
Athletes Passed
1643
Passed By
2176
Net Change
-533
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14423
5K → 10K593130+463#14423#13960
10K → 15K62599-537#13960#14497
15K → 20K216123+93#14497#14404
20K → Half3640-4#14404#14408
Half → 25K23643+193#14408#14215
25K → 30K108375-267#14215#14482
30K → 20M11264+48#14482#14434
20M → 21M37204-167#14434#14601
21M → 35K5335+18#14601#14583
35K → 23M54125-71#14583#14654
23M → 24M45130-85#14654#14739
24M → 40K4994-45#14739#14784
40K → 25.2M2237-15#14784#14799
25.2M → Finish20177-157#14799#14956
TOTALS16432176-533
📊

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