Boston Marathon logo
BOSTON MARATHON 2023

Mary Sedlak

Bib: 14621•F

MA

0:00
0:00
/ mi
Be the first to cheer!
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

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
7:35/mi
23:33
↑ 97↓ 3451.5%
10K· 6.21 mi
7:32/mi
46:58
↑ 79↓ 1380.4%
15K· 9.32 mi
7:24/mi
1:09:56
↑ 67↓ 78
20K· 12.43 mi
7:35/mi
1:33:30
↑ 106↓ 860.1%
Half· 13.11 mi
7:33/mi
1:38:39
↑ 19↓ 370.5%
25K· 15.53 mi
7:34/mi
1:56:59
↑ 66↓ 880.2%
30K· 18.64 mi
7:44/mi
2:21:01
↑ 181↓ 1480.2%
20M
7:37/mi
2:31:22
↑ 64↓ 500.2%
21M
8:07/mi
2:39:29
↑ 106↓ 241.6%
35K· 21.75 mi
7:26/mi
2:45:03
↑ 17↓ 861.7%
23M
7:50/mi
2:54:52
↑ 23↓ 630.6%
24M
7:28/mi
3:02:20
↓ 821.3%
40K· 24.85 mi
7:35/mi
3:08:49
↓ 200.3%
25.2M
7:58/mi
3:11:34
↑ 13↓ 160.2%
Finish· 26.22 mi
7:16/mi
3:18:58
↑ 22↓ 21

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:39
Pace7:31 /mi
2nd Half
Distance13.11 mi
Time1:40:19
Pace7:39 /mi
📊Positive Split: 1.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:2823:337:3523:33
7:35
-
10K
6.21 mi11:15:5346:587:3423:25
7:32
-0:03
15K
9.32 mi11:38:511:09:567:3022:58
7:24
-0:08
20K
12.43 mi12:02:251:33:307:3123:34
7:35
+0:11
Half
13.11 mi12:07:341:38:397:315:09
7:33
-0:02
25K
15.53 mi12:25:541:56:597:3218:20
7:34
+0:01
30K
18.64 mi12:49:562:21:017:3424:02
7:44
+0:10
20M
20.00 mi13:00:172:31:227:3410:21
7:37
-0:07
21M
21.00 mi13:08:242:39:297:368:07
8:07
+0:30
35K
21.75 mi13:13:582:45:037:355:34
7:26
-0:41
23M
23.00 mi13:23:472:54:527:369:49
7:50
+0:24
24M
24.00 mi13:31:153:02:207:367:28
7:28
-0:22
40K
24.85 mi13:37:443:08:497:366:29
7:35
+0:07
25.2M
25.20 mi13:40:293:11:347:362:45
7:58
+0:23
Finish
26.22 mi13:47:533:18:587:367:24
7:16
-0:42

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

7:16 /mi

Average Pace

7:36 /mi

Slowest Pace

8:07 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:10:51

96% of race

Time at Steady Pace

8:07

4% of race

Time at Slower Pace

0:00

0% 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 mi10:52:2823:337:3523:33
7:35
#10362
10K
6.21 mi11:15:5346:587:3423:25
7:32
#10554
15K
9.32 mi11:38:511:09:567:3022:58
7:24
#10095
20K
12.43 mi12:02:251:33:307:3123:34
7:35
#10042
Half
13.11 mi12:07:341:38:397:315:09
7:33
#10052
25K
15.53 mi12:25:541:56:597:3218:20
7:34
#9896
30K
18.64 mi12:49:562:21:017:3424:02
7:44
#9703
20M
20.00 mi13:00:172:31:227:3410:21
7:37
#9515
21M
21.00 mi13:08:242:39:297:368:07
8:07
#9383
35K
21.75 mi13:13:582:45:037:355:34
7:26
#9314
23M
23.00 mi13:23:472:54:527:369:49
7:50
#9245
24M
24.00 mi13:31:153:02:207:367:28
7:28
#9145
40K
24.85 mi13:37:443:08:497:366:29
7:35
#9050
25.2M
25.20 mi13:40:293:11:347:362:45
7:58
#8988
Finish
26.22 mi13:47:533:18:587:367:24
7:16
#8876
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi10362201920199280(Top 35%)1544(Top 14%)1544(Top 32%)
10K6.21 mi3.10 mi10554-1922097-782097-7810788(Top 41%)2194(Top 19%)2194(Top 45%)
15K9.32 mi3.11 mi10095+4591861+2361861+2369280(Top 35%)1544(Top 14%)1544(Top 32%)
20K12.43 mi3.11 mi10042+531845+161845+169985(Top 38%)1903(Top 17%)1903(Top 39%)
Half13.11 mi0.68 mi10052-101857-121857-1210633(Top 40%)2171(Top 19%)2171(Top 44%)
25K15.53 mi2.42 mi9896+1561810+471810+479260(Top 35%)1660(Top 15%)1660(Top 34%)
30K18.64 mi3.11 mi9703+1931763+471763+478912(Top 33%)1672(Top 15%)1672(Top 34%)
20M20.00 mi1.36 mi9515+1881711+521711+527626(Top 29%)1269(Top 11%)1269(Top 26%)
21M21.00 mi1.00 mi9383+1321686+251686+258139(Top 31%)1577(Top 14%)1577(Top 32%)
35K21.75 mi0.75 mi9314+691680+61680+68141(Top 31%)1559(Top 14%)1559(Top 32%)
23M23.00 mi1.25 mi9245+691675+51675+58698(Top 33%)1881(Top 16%)1881(Top 39%)
24M24.00 mi1.00 mi9145+1001654+211654+217510(Top 28%)1493(Top 13%)1493(Top 31%)
40K24.85 mi0.85 mi9050+951628+261628+267249(Top 27%)1468(Top 13%)1468(Top 30%)
25.2M25.20 mi0.35 mi8988+621613+151613+156436(Top 24%)1220(Top 11%)1220(Top 25%)
Finish26.22 mi1.02 mi8876+1121592+211592+216876(Top 26%)1381(Top 12%)1381(Top 28%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 35%
×21story building
+97ft-345ft

Overall

9280

Females

1544

F18-39

1544

5K→10K

3.1 - 6.2 mi

Top 41%
×5story building
+79ft-138ft

Overall

10788

Females

2194

F18-39

2194

10K→15K

6.2 - 9.3 mi

Top 35%
×3story building
+67ft-78ft

Overall

9280

Females

1544

F18-39

1544

15K→20K

9.3 - 12.4 mi

Top 38%
×5story building
+106ft-86ft

Overall

9985

Females

1903

F18-39

1903

20K→Half

12.4 - 13.1 mi

Top 40%
×2story building
+19ft-37ft

Overall

10633

Females

2171

F18-39

2171

Half→25K

13.1 - 15.5 mi

Top 35%
×4story building
+66ft-88ft

Overall

9260

Females

1660

F18-39

1660

25K→30K

15.5 - 18.6 mi

Top 33%
×9story building
+181ft-148ft

Overall

8912

Females

1672

F18-39

1672

30K→20M

18.6 - 20.0 mi

Top 29%
×5story building
+64ft-50ft

Overall

7626

Females

1269

F18-39

1269

20M→21M

20.0 - 21.0 mi

Top 31%
×8story building
+106ft-24ft

Overall

8139

Females

1577

F18-39

1577

21M→35K

21.0 - 21.8 mi

Top 31%
×7story building
+17ft-86ft

Overall

8141

Females

1559

F18-39

1559

35K→23M

21.8 - 23.0 mi

Top 33%
×5story building
+23ft-63ft

Overall

8698

Females

1881

F18-39

1881

23M→24M

23.0 - 24.0 mi

Top 28%
×6story building
+12ft-82ft

Overall

7510

Females

1493

F18-39

1493

24M→40K

24.0 - 24.9 mi

Top 27%
×1story
+6ft-20ft

Overall

7249

Females

1468

F18-39

1468

40K→25.2M

24.9 - 25.2 mi

Top 24%
×1story
+13ft-16ft

Overall

6436

Females

1220

F18-39

1220

25.2M→Finish

25.2 - 26.2 mi

Top 26%
×2story building
+22ft-21ft

Overall

6876

Females

1381

F18-39

1381

Passing Analysis

Category:
Athletes Passed
2318*
Passed By
832
Net Change
+1486
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10362
5K → 10K197*389-192#10362#10554
10K → 15K49536+459#10554#10095
15K → 20K203*150+53#10095#10042
20K → Half2131-10#10042#10052
Half → 25K197*41+156#10052#9896
25K → 30K256*63+193#9896#9703
30K → 20M1979+188#9703#9515
20M → 21M14917+132#9515#9383
21M → 35K8617+69#9383#9314
35K → 23M11243+69#9314#9245
23M → 24M1099+100#9245#9145
24M → 40K1038+95#9145#9050
40K → 25.2M653+62#9050#8988
25.2M → Finish12816+112#8988#8876
TOTALS2318*832+1486

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

📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing