Boston Marathon logo
BOSTON MARATHON 2023

Sarah Decker

Bib: 26047•F

MA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Division (F18-39)
#0 / 4884
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
28:05
Rank: #20629
Start → 5K
28:05 | 9:02/mi
10K· 6.21 mi
54:45
Rank: #19743 (+886)
5K → 10K
26:40 | 8:35/mi
15K· 9.32 mi
1:21:38
Rank: #19385 (+358)
10K → 15K
26:53 | 8:39/mi
20K· 12.43 mi
1:48:56
Rank: #19148 (+237)
15K → 20K
27:18 | 8:47/mi
Half· 13.11 mi
1:54:52
Rank: #19129 (+19)
20K → Half
5:56 | 8:42/mi
25K· 15.53 mi
2:16:09
Rank: #18919 (+210)
Half → 25K
21:17 | 8:47/mi
30K· 18.64 mi
2:43:55
Rank: #18536 (+383)
25K → 30K
27:46 | 8:56/mi
20M
2:56:10
Rank: #18381 (+155)
30K → 20M
12:15 | 9:01/mi
21M
3:05:42
Rank: #18246 (+135)
20M → 21M
9:32 | 9:32/mi
35K· 21.75 mi
3:12:15
Rank: #18172 (+74)
21M → 35K
6:33 | 8:45/mi
23M
3:23:36
Rank: #18064 (+108)
35K → 23M
11:21 | 9:04/mi
24M
3:32:28
Rank: #17998 (+66)
23M → 24M
8:52 | 8:52/mi
40K· 24.85 mi
3:40:14
Rank: #17948 (+50)
24M → 40K
7:46 | 9:05/mi
25.2M
3:43:36
Rank: #17920 (+28)
40K → 25.2M
3:22 | 9:46/mi
Finish· 26.22 mi
3:52:28
Rank: #17879 (+41)
25.2M → Finish
8:52 | 8:42/mi

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
Time1:54:52
Pace8:46 /mi
2nd Half
Distance13.11 mi
Time1:57:36
Pace8:58 /mi
📊Positive Split: 2.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:44:2728:059:0228:05
9:02
-
10K
6.21 mi12:11:0754:458:4926:40
8:35
-0:27
15K
9.32 mi12:38:001:21:388:4626:53
8:39
+0:04
20K
12.43 mi13:05:181:48:568:4627:18
8:47
+0:08
Half
13.11 mi13:11:141:54:528:465:56
8:42
-0:05
25K
15.53 mi13:32:312:16:098:4621:17
8:47
+0:05
30K
18.64 mi14:00:172:43:558:4827:46
8:56
+0:09
20M
20.00 mi14:12:322:56:108:4812:15
9:01
+0:05
21M
21.00 mi14:22:043:05:428:519:32
9:32
+0:31
35K
21.75 mi14:28:373:12:158:506:33
8:45
-0:47
23M
23.00 mi14:39:583:23:368:5111:21
9:04
+0:19
24M
24.00 mi14:48:503:32:288:518:52
8:52
-0:12
40K
24.85 mi14:56:363:40:148:527:46
9:05
+0:13
25.2M
25.20 mi14:59:583:43:368:523:22
9:46
+0:41
Finish
26.22 mi15:08:503:52:288:528:52
8:42
-1:04

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

8:35 /mi

Average Pace

8:52 /mi

Slowest Pace

9:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:39:34

94% of race

Time at Steady Pace

12:54

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:52 /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 mi11:44:2728:059:0228:05
9:02
#20629
10K
6.21 mi12:11:0754:458:4926:40
8:35
#19743
15K
9.32 mi12:38:001:21:388:4626:53
8:39
#19385
20K
12.43 mi13:05:181:48:568:4627:18
8:47
#19148
Half
13.11 mi13:11:141:54:528:465:56
8:42
#19129
25K
15.53 mi13:32:312:16:098:4621:17
8:47
#18919
30K
18.64 mi14:00:172:43:558:4827:46
8:56
#18536
20M
20.00 mi14:12:322:56:108:4812:15
9:01
#18381
21M
21.00 mi14:22:043:05:428:519:32
9:32
#18246
35K
21.75 mi14:28:373:12:158:506:33
8:45
#18172
23M
23.00 mi14:39:583:23:368:5111:21
9:04
#18064
24M
24.00 mi14:48:503:32:288:518:52
8:52
#17998
40K
24.85 mi14:56:363:40:148:527:46
9:05
#17948
25.2M
25.20 mi14:59:583:43:368:523:22
9:46
#17920
Finish
26.22 mi15:08:503:52:288:528:52
8:42
#17879
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi206298184818418747(Top 70%)6950(Top 61%)6950(Top 142%)
10K6.21 mi3.10 mi19743+8867622+5627622+56218773(Top 71%)6943(Top 61%)6943(Top 142%)
15K9.32 mi3.11 mi19385+3587379+2437379+24318747(Top 70%)6950(Top 61%)6950(Top 142%)
20K12.43 mi3.11 mi19148+2377206+1737206+17318600(Top 70%)6849(Top 60%)6849(Top 140%)
Half13.11 mi0.68 mi19129+197195+117195+1118946(Top 71%)7045(Top 62%)7045(Top 144%)
25K15.53 mi2.42 mi18919+2107075+1207075+12017838(Top 67%)6482(Top 57%)6482(Top 133%)
30K18.64 mi3.11 mi18536+3836891+1846891+18416861(Top 63%)5988(Top 52%)5988(Top 123%)
20M20.00 mi1.36 mi18381+1556800+916800+9116645(Top 63%)5947(Top 52%)5947(Top 122%)
21M21.00 mi1.00 mi18246+1356746+546746+5416148(Top 61%)5715(Top 50%)5715(Top 117%)
35K21.75 mi0.75 mi18172+746706+406706+4016766(Top 63%)6154(Top 54%)6154(Top 126%)
23M23.00 mi1.25 mi18064+1086648+586648+5816404(Top 62%)5976(Top 52%)5976(Top 122%)
24M24.00 mi1.00 mi17998+666627+216627+2116621(Top 62%)6151(Top 54%)6151(Top 126%)
40K24.85 mi0.85 mi17948+506605+226605+2216589(Top 62%)6179(Top 54%)6179(Top 127%)
25.2M25.20 mi0.35 mi17920+286590+156590+1516429(Top 62%)6123(Top 54%)6123(Top 125%)
Finish26.22 mi1.02 mi17879+416575+156575+1516523(Top 62%)6114(Top 54%)6114(Top 125%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 70%
×21stories
+97ft-345ft

Overall

18747

Females

6950

F18-39

6950

5K→10K

3.1 - 6.2 mi

Top 71%
×5stories
+79ft-138ft

Overall

18773

Females

6943

F18-39

6943

10K→15K

6.2 - 9.3 mi

Top 70%
×3stories
+67ft-78ft

Overall

18747

Females

6950

F18-39

6950

15K→20K

9.3 - 12.4 mi

Top 70%
×5stories
+106ft-86ft

Overall

18600

Females

6849

F18-39

6849

20K→Half

12.4 - 13.1 mi

Top 71%
×2stories
+19ft-37ft

Overall

18946

Females

7045

F18-39

7045

Half→25K

13.1 - 15.5 mi

Top 67%
×4stories
+66ft-88ft

Overall

17838

Females

6482

F18-39

6482

25K→30K

15.5 - 18.6 mi

Top 63%
×9stories
+181ft-148ft

Overall

16861

Females

5988

F18-39

5988

30K→20M

18.6 - 20.0 mi

Top 63%
×5stories
+64ft-50ft

Overall

16645

Females

5947

F18-39

5947

20M→21M

20.0 - 21.0 mi

Top 61%
×8stories
+106ft-24ft

Overall

16148

Females

5715

F18-39

5715

21M→35K

21.0 - 21.8 mi

Top 63%
×7stories
+17ft-86ft

Overall

16766

Females

6154

F18-39

6154

35K→23M

21.8 - 23.0 mi

Top 62%
×5stories
+23ft-63ft

Overall

16404

Females

5976

F18-39

5976

23M→24M

23.0 - 24.0 mi

Top 62%
×6stories
+12ft-82ft

Overall

16621

Females

6151

F18-39

6151

24M→40K

24.0 - 24.9 mi

Top 62%
×1story
+6ft-20ft

Overall

16589

Females

6179

F18-39

6179

40K→25.2M

24.9 - 25.2 mi

Top 62%
×1story
+13ft-16ft

Overall

16429

Females

6123

F18-39

6123

25.2M→Finish

25.2 - 26.2 mi

Top 62%
×2stories
+22ft-21ft

Overall

16523

Females

6114

F18-39

6114

Passing Analysis

Category:
Athletes Passed
3200
Passed By
450
Net Change
+2750
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20629
5K → 10K96276+886#20629#19743
10K → 15K42062+358#19743#19385
15K → 20K29356+237#19385#19148
20K → Half3718+19#19148#19129
Half → 25K23222+210#19129#18919
25K → 30K40522+383#18919#18536
30K → 20M18227+155#18536#18381
20M → 21M16429+135#18381#18246
21M → 35K9117+74#18246#18172
35K → 23M13022+108#18172#18064
23M → 24M9024+66#18064#17998
24M → 40K7727+50#17998#17948
40K → 25.2M4113+28#17948#17920
25.2M → Finish7635+41#17920#17879
TOTALS3200450+2750
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

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
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing