Boston Marathon logo
BOSTON MARATHON 2023

Brittany Shortall

Bib: 30779•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
30:18
Rank: #22796
Start → 5K
30:18 | 9:45/mi
10K· 6.21 mi
59:55
Rank: #22734 (+62)
5K → 10K
29:37 | 9:32/mi
15K· 9.32 mi
1:29:53
Rank: #22706 (+28)
10K → 15K
29:58 | 9:39/mi
20K· 12.43 mi
1:59:32
Rank: #22459 (+247)
15K → 20K
29:39 | 9:33/mi
Half· 13.11 mi
2:05:57
Rank: #22425 (+34)
20K → Half
6:25 | 9:24/mi
25K· 15.53 mi
2:28:57
Rank: #22162 (+263)
Half → 25K
23:00 | 9:29/mi
30K· 18.64 mi
2:58:35
Rank: #21691 (+471)
25K → 30K
29:38 | 9:32/mi
20M
3:11:06
Rank: #21471 (+220)
30K → 20M
12:31 | 9:13/mi
21M
3:20:28
Rank: #21185 (+286)
20M → 21M
9:22 | 9:22/mi
35K· 21.75 mi
3:27:00
Rank: #21033 (+152)
21M → 35K
6:32 | 8:44/mi
23M
3:38:31
Rank: #20805 (+228)
35K → 23M
11:31 | 9:12/mi
24M
3:48:06
Rank: #20742 (+63)
23M → 24M
9:35 | 9:35/mi
40K· 24.85 mi
3:56:42
Rank: #20707 (+35)
24M → 40K
8:36 | 10:04/mi
25.2M
4:00:28
Rank: #20694 (+13)
40K → 25.2M
3:46 | 10:55/mi
Finish· 26.22 mi
4:09:45
Rank: #20629 (+65)
25.2M → Finish
9:17 | 9:07/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 Half
Distance13.11 mi
Time2:05:57
Pace9:36 /mi
2nd Half✓ Faster
Distance13.11 mi
Time2:03:48
Pace9:27 /mi
📊Negative Split: 1.7% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:50:5830:189:4530:18
9:45
-
10K
6.21 mi12:20:3559:559:3929:37
9:32
-0:13
15K
9.32 mi12:50:331:29:539:3929:58
9:39
+0:07
20K
12.43 mi13:20:121:59:329:3729:39
9:33
-0:06
Half
13.11 mi13:26:372:05:579:366:25
9:24
-0:09
25K
15.53 mi13:49:372:28:579:3523:00
9:29
+0:05
30K
18.64 mi14:19:152:58:359:3529:38
9:32
+0:03
20M
20.00 mi14:31:463:11:069:3312:31
9:13
-0:19
21M
21.00 mi14:41:083:20:289:339:22
9:22
+0:09
35K
21.75 mi14:47:403:27:009:316:32
8:44
-0:38
23M
23.00 mi14:59:113:38:319:3011:31
9:12
+0:28
24M
24.00 mi15:08:463:48:069:309:35
9:35
+0:23
40K
24.85 mi15:17:223:56:429:318:36
10:04
+0:29
25.2M
25.20 mi15:21:084:00:289:333:46
10:55
+0:51
Finish
26.22 mi15:30:254:09:459:329:17
9:07
-1:48

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

8:44 /mi

Average Pace

9:32 /mi

Slowest Pace

10:55 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

39:51

16% of race

Time at Steady Pace

3:17:32

79% of race

Time at Slower Pace

12:22

5% of race

Average Pace: 9:32 /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 mi11:50:5830:189:4530:18
9:45
#22796
10K
6.21 mi12:20:3559:559:3929:37
9:32
#22734
15K
9.32 mi12:50:331:29:539:3929:58
9:39
#22706
20K
12.43 mi13:20:121:59:329:3729:39
9:33
#22459
Half
13.11 mi13:26:372:05:579:366:25
9:24
#22425
25K
15.53 mi13:49:372:28:579:3523:00
9:29
#22162
30K
18.64 mi14:19:152:58:359:3529:38
9:32
#21691
20M
20.00 mi14:31:463:11:069:3312:31
9:13
#21471
21M
21.00 mi14:41:083:20:289:339:22
9:22
#21185
35K
21.75 mi14:47:403:27:009:316:32
8:44
#21033
23M
23.00 mi14:59:113:38:319:3011:31
9:12
#20805
24M
24.00 mi15:08:463:48:069:309:35
9:35
#20742
40K
24.85 mi15:17:223:56:429:318:36
10:04
#20707
25.2M
25.20 mi15:21:084:00:289:333:46
10:55
#20694
Finish
26.22 mi15:30:254:09:459:329:17
9:07
#20629
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi227969273927322651(Top 85%)9155(Top 80%)9155(Top 187%)
10K6.21 mi3.10 mi22734+629215+589215+5822608(Top 85%)9142(Top 80%)9142(Top 187%)
15K9.32 mi3.11 mi22706+289189+269189+2622651(Top 85%)9155(Top 80%)9155(Top 187%)
20K12.43 mi3.11 mi22459+2479064+1259064+12521688(Top 81%)8617(Top 75%)8617(Top 176%)
Half13.11 mi0.68 mi22425+349045+199045+1921838(Top 82%)8699(Top 76%)8699(Top 178%)
25K15.53 mi2.42 mi22162+2638919+1268919+12620798(Top 78%)8164(Top 71%)8164(Top 167%)
30K18.64 mi3.11 mi21691+4718663+2568663+25619586(Top 74%)7527(Top 66%)7527(Top 154%)
20M20.00 mi1.36 mi21471+2208550+1138550+11317636(Top 66%)6548(Top 57%)6548(Top 134%)
21M21.00 mi1.00 mi21185+2868417+1338417+13315364(Top 58%)5272(Top 46%)5272(Top 108%)
35K21.75 mi0.75 mi21033+1528346+718346+7116648(Top 63%)6088(Top 53%)6088(Top 125%)
23M23.00 mi1.25 mi20805+2288220+1268220+12617082(Top 64%)6344(Top 56%)6344(Top 130%)
24M24.00 mi1.00 mi20742+638201+198201+1919519(Top 73%)7729(Top 68%)7729(Top 158%)
40K24.85 mi0.85 mi20707+358191+108191+1020145(Top 76%)8135(Top 71%)8135(Top 167%)
25.2M25.20 mi0.35 mi20694+138191819120302(Top 76%)8215(Top 72%)8215(Top 168%)
Finish26.22 mi1.02 mi20629+658162+298162+2918540(Top 70%)7198(Top 63%)7198(Top 147%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 85%
×21stories
+97ft-345ft

Overall

22651

Females

9155

F18-39

9155

5K→10K

3.1 - 6.2 mi

Top 85%
×5stories
+79ft-138ft

Overall

22608

Females

9142

F18-39

9142

10K→15K

6.2 - 9.3 mi

Top 85%
×3stories
+67ft-78ft

Overall

22651

Females

9155

F18-39

9155

15K→20K

9.3 - 12.4 mi

Top 81%
×5stories
+106ft-86ft

Overall

21688

Females

8617

F18-39

8617

20K→Half

12.4 - 13.1 mi

Top 82%
×2stories
+19ft-37ft

Overall

21838

Females

8699

F18-39

8699

Half→25K

13.1 - 15.5 mi

Top 78%
×4stories
+66ft-88ft

Overall

20798

Females

8164

F18-39

8164

25K→30K

15.5 - 18.6 mi

Top 74%
×9stories
+181ft-148ft

Overall

19586

Females

7527

F18-39

7527

30K→20M

18.6 - 20.0 mi

Top 66%
×5stories
+64ft-50ft

Overall

17636

Females

6548

F18-39

6548

20M→21M

20.0 - 21.0 mi

Top 58%
×8stories
+106ft-24ft

Overall

15364

Females

5272

F18-39

5272

21M→35K

21.0 - 21.8 mi

Top 63%
×7stories
+17ft-86ft

Overall

16648

Females

6088

F18-39

6088

35K→23M

21.8 - 23.0 mi

Top 64%
×5stories
+23ft-63ft

Overall

17082

Females

6344

F18-39

6344

23M→24M

23.0 - 24.0 mi

Top 73%
×6stories
+12ft-82ft

Overall

19519

Females

7729

F18-39

7729

24M→40K

24.0 - 24.9 mi

Top 76%
×1story
+6ft-20ft

Overall

20145

Females

8135

F18-39

8135

40K→25.2M

24.9 - 25.2 mi

Top 76%
×1story
+13ft-16ft

Overall

20302

Females

8215

F18-39

8215

25.2M→Finish

25.2 - 26.2 mi

Top 70%
×2stories
+22ft-21ft

Overall

18540

Females

7198

F18-39

7198

Passing Analysis

Category:
Athletes Passed
2638
Passed By
471
Net Change
+2167
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22796
5K → 10K274212+62#22796#22734
10K → 15K162134+28#22734#22706
15K → 20K28134+247#22706#22459
20K → Half4511+34#22459#22425
Half → 25K27512+263#22425#22162
25K → 30K4765+471#22162#21691
30K → 20M2200+220#21691#21471
20M → 21M2860+286#21471#21185
21M → 35K1531+152#21185#21033
35K → 23M2324+228#21033#20805
23M → 24M7411+63#20805#20742
24M → 40K5520+35#20742#20707
40K → 25.2M2512+13#20707#20694
25.2M → Finish8015+65#20694#20629
TOTALS2638471+2167
📊

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