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BOSTON MARATHON 2023

Stefanie Schwemlein

Bib: 12437•F

CA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 33%
Gender (Female)
#0 / 11423
Top 14%
Division (F18-39)
#0 / 4884
Top 25%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:45
Rank: #10973
Start → 5K
23:45 | 7:39/mi
10K· 6.21 mi
47:28
Rank: #11252 (-279)
5K → 10K
23:43 | 7:38/mi
15K· 9.32 mi
1:11:15
Rank: #11311 (-59)
10K → 15K
23:47 | 7:39/mi
20K· 12.43 mi
1:35:32
Rank: #11417 (-106)
15K → 20K
24:17 | 7:49/mi
Half· 13.11 mi
1:40:40
Rank: #11357 (+60)
20K → Half
5:08 | 7:31/mi
25K· 15.53 mi
1:58:49
Rank: #10889 (+468)
Half → 25K
18:09 | 7:29/mi
30K· 18.64 mi
2:22:40
Rank: #10384 (+505)
25K → 30K
23:51 | 7:41/mi
20M
2:33:06
Rank: #10203 (+181)
30K → 20M
10:26 | 7:41/mi
21M
2:41:02
Rank: #9968 (+235)
20M → 21M
7:56 | 7:56/mi
35K· 21.75 mi
2:46:44
Rank: #9926 (+42)
21M → 35K
5:42 | 7:37/mi
23M
2:56:10
Rank: #9684 (+242)
35K → 23M
9:26 | 7:32/mi
24M
3:03:31
Rank: #9531 (+153)
23M → 24M
7:21 | 7:21/mi
40K· 24.85 mi
3:09:48
Rank: #9348 (+183)
24M → 40K
6:17 | 7:21/mi
25.2M
3:12:22
Rank: #9215 (+133)
40K → 25.2M
2:34 | 7:27/mi
Finish· 26.22 mi
3:18:58
Rank: #8875 (+340)
25.2M → Finish
6:36 | 6:29/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:40:40
Pace7:41 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:38:18
Pace7:30 /mi
📊Negative Split: 2.4% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:55:1723:457:3923:45
7:39
-
10K
6.21 mi11:19:0047:287:3823:43
7:38
-0:01
15K
9.32 mi11:42:471:11:157:3923:47
7:39
+0:01
20K
12.43 mi12:07:041:35:327:4124:17
7:49
+0:10
Half
13.11 mi12:12:121:40:407:415:08
7:31
-0:18
25K
15.53 mi12:30:211:58:497:3918:09
7:29
-0:02
30K
18.64 mi12:54:122:22:407:3923:51
7:41
+0:12
20M
20.00 mi13:04:382:33:067:3910:26
7:41
0:00
21M
21.00 mi13:12:342:41:027:407:56
7:56
+0:15
35K
21.75 mi13:18:162:46:447:405:42
7:37
-0:19
23M
23.00 mi13:27:422:56:107:409:26
7:32
-0:05
24M
24.00 mi13:35:033:03:317:397:21
7:21
-0:11
40K
24.85 mi13:41:203:09:487:386:17
7:21
0:00
25.2M
25.20 mi13:43:543:12:227:382:34
7:27
+0:06
Finish
26.22 mi13:50:303:18:587:366:36
6:29
-0:58

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

6:29 /mi

Average Pace

7:36 /mi

Slowest Pace

7:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

22:48

11% of race

Time at Steady Pace

2:23:57

72% of race

Time at Slower Pace

32:13

16% of race

Average Pace: 7:35 /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 mi10:55:1723:457:3923:45
7:39
#10973
10K
6.21 mi11:19:0047:287:3823:43
7:38
#11252
15K
9.32 mi11:42:471:11:157:3923:47
7:39
#11311
20K
12.43 mi12:07:041:35:327:4124:17
7:49
#11417
Half
13.11 mi12:12:121:40:407:415:08
7:31
#11357
25K
15.53 mi12:30:211:58:497:3918:09
7:29
#10889
30K
18.64 mi12:54:122:22:407:3923:51
7:41
#10384
20M
20.00 mi13:04:382:33:067:3910:26
7:41
#10203
21M
21.00 mi13:12:342:41:027:407:56
7:56
#9968
35K
21.75 mi13:18:162:46:447:405:42
7:37
#9926
23M
23.00 mi13:27:422:56:107:409:26
7:32
#9684
24M
24.00 mi13:35:033:03:317:397:21
7:21
#9531
40K
24.85 mi13:41:203:09:487:386:17
7:21
#9348
25.2M
25.20 mi13:43:543:12:227:382:34
7:27
#9215
Finish
26.22 mi13:50:303:18:587:366:36
6:29
#8875
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi109732310231011466(Top 43%)2605(Top 23%)2605(Top 53%)
10K6.21 mi3.10 mi11252-2792467-1572467-15711642(Top 44%)2667(Top 23%)2667(Top 55%)
15K9.32 mi3.11 mi11311-592493-262493-2611466(Top 43%)2605(Top 23%)2605(Top 53%)
20K12.43 mi3.11 mi11417-1062560-672560-6711868(Top 45%)2882(Top 25%)2882(Top 59%)
Half13.11 mi0.68 mi11357+602538+222538+2210433(Top 39%)2088(Top 18%)2088(Top 43%)
25K15.53 mi2.42 mi10889+4682293+2452293+2458702(Top 33%)1431(Top 13%)1431(Top 29%)
30K18.64 mi3.11 mi10384+5052093+2002093+2008493(Top 32%)1504(Top 13%)1504(Top 31%)
20M20.00 mi1.36 mi10203+1812024+692024+698050(Top 30%)1425(Top 12%)1425(Top 29%)
21M21.00 mi1.00 mi9968+2351933+911933+916960(Top 26%)1120(Top 10%)1120(Top 23%)
35K21.75 mi0.75 mi9926+421928+51928+59427(Top 35%)2104(Top 18%)2104(Top 43%)
23M23.00 mi1.25 mi9684+2421853+751853+756659(Top 25%)1050(Top 9%)1050(Top 21%)
24M24.00 mi1.00 mi9531+1531809+441809+446765(Top 25%)1187(Top 10%)1187(Top 24%)
40K24.85 mi0.85 mi9348+1831765+441765+445800(Top 22%)917(Top 8%)917(Top 19%)
25.2M25.20 mi0.35 mi9215+1331719+461719+463722(Top 14%)400(Top 4%)400(Top 8%)
Finish26.22 mi1.02 mi8875+3401591+1281591+1282404(Top 9%)190(Top 2%)190(Top 4%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 43%
×21stories
+97ft-345ft

Overall

11466

Females

2605

F18-39

2605

5K→10K

3.1 - 6.2 mi

Top 44%
×5stories
+79ft-138ft

Overall

11642

Females

2667

F18-39

2667

10K→15K

6.2 - 9.3 mi

Top 43%
×3stories
+67ft-78ft

Overall

11466

Females

2605

F18-39

2605

15K→20K

9.3 - 12.4 mi

Top 45%
×5stories
+106ft-86ft

Overall

11868

Females

2882

F18-39

2882

20K→Half

12.4 - 13.1 mi

Top 39%
×2stories
+19ft-37ft

Overall

10433

Females

2088

F18-39

2088

Half→25K

13.1 - 15.5 mi

Top 33%
×4stories
+66ft-88ft

Overall

8702

Females

1431

F18-39

1431

25K→30K

15.5 - 18.6 mi

Top 32%
×9stories
+181ft-148ft

Overall

8493

Females

1504

F18-39

1504

30K→20M

18.6 - 20.0 mi

Top 30%
×5stories
+64ft-50ft

Overall

8050

Females

1425

F18-39

1425

20M→21M

20.0 - 21.0 mi

Top 26%
×8stories
+106ft-24ft

Overall

6960

Females

1120

F18-39

1120

21M→35K

21.0 - 21.8 mi

Top 35%
×7stories
+17ft-86ft

Overall

9427

Females

2104

F18-39

2104

35K→23M

21.8 - 23.0 mi

Top 25%
×5stories
+23ft-63ft

Overall

6659

Females

1050

F18-39

1050

23M→24M

23.0 - 24.0 mi

Top 25%
×6stories
+12ft-82ft

Overall

6765

Females

1187

F18-39

1187

24M→40K

24.0 - 24.9 mi

Top 22%
×1story
+6ft-20ft

Overall

5800

Females

917

F18-39

917

40K→25.2M

24.9 - 25.2 mi

Top 14%
×1story
+13ft-16ft

Overall

3722

Females

400

F18-39

400

25.2M→Finish

25.2 - 26.2 mi

Top 9%
×2stories
+22ft-21ft

Overall

2404

Females

190

F18-39

190

Passing Analysis

Category:
Athletes Passed
3085*
Passed By
987
Net Change
+2098
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10973
5K → 10K180459-279#10973#11252
10K → 15K160219-59#11252#11311
15K → 20K136242-106#11311#11417
20K → Half677+60#11417#11357
Half → 25K4680+468#11357#10889
25K → 30K51914+505#10889#10384
30K → 20M190*9+181#10384#10203
20M → 21M239*4+235#10203#9968
21M → 35K6119+42#9968#9926
35K → 23M2508+242#9926#9684
23M → 24M1574+153#9684#9531
24M → 40K185*2+183#9531#9348
40K → 25.2M1330+133#9348#9215
25.2M → Finish3400+340#9215#8875
TOTALS3085*987+2098

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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