Boston Marathon logo
BOSTON MARATHON 2023

Emily Grazaitis

Bib: 19349•F

IL

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 47%
Gender (Female)
#0 / 11423
Top 30%
Division (F18-39)
#0 / 4884
Top 48%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:06
Rank: #11996
Start → 5K
24:06 | 7:45/mi
10K· 6.21 mi
47:37
Rank: #11467 (+529)
5K → 10K
23:31 | 7:34/mi
15K· 9.32 mi
1:11:36
Rank: #11632 (-165)
10K → 15K
23:59 | 7:43/mi
20K· 12.43 mi
1:35:47
Rank: #11592 (+40)
15K → 20K
24:11 | 7:47/mi
Half· 13.11 mi
1:41:06
Rank: #11637 (-45)
20K → Half
5:19 | 7:48/mi
25K· 15.53 mi
2:00:13
Rank: #11612 (+25)
Half → 25K
19:07 | 7:53/mi
30K· 18.64 mi
2:25:29
Rank: #11649 (-37)
25K → 30K
25:16 | 8:08/mi
20M
2:36:55
Rank: #11762 (-113)
30K → 20M
11:26 | 8:25/mi
21M
2:46:03
Rank: #11931 (-169)
20M → 21M
9:08 | 9:08/mi
35K· 21.75 mi
2:52:09
Rank: #11970 (-39)
21M → 35K
6:06 | 8:09/mi
23M
3:03:07
Rank: #12150 (-180)
35K → 23M
10:58 | 8:46/mi
24M
3:11:38
Rank: #12272 (-122)
23M → 24M
8:31 | 8:31/mi
40K· 24.85 mi
3:19:01
Rank: #12345 (-73)
24M → 40K
7:23 | 8:38/mi
25.2M
3:22:12
Rank: #12367 (-22)
40K → 25.2M
3:11 | 9:14/mi
Finish· 26.22 mi
3:30:38
Rank: #12437 (-70)
25.2M → Finish
8:26 | 8:17/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
Time1:41:06
Pace7:43 /mi
2nd Half
Distance13.11 mi
Time1:49:32
Pace8:21 /mi
📊Positive Split: 8.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:0424:067:4524:06
7:45
-
10K
6.21 mi11:39:3547:377:4023:31
7:34
-0:11
15K
9.32 mi12:03:341:11:367:4123:59
7:43
+0:09
20K
12.43 mi12:27:451:35:477:4224:11
7:47
+0:04
Half
13.11 mi12:33:041:41:067:435:19
7:48
+0:01
25K
15.53 mi12:52:112:00:137:4419:07
7:53
+0:05
30K
18.64 mi13:17:272:25:297:4825:16
8:08
+0:15
20M
20.00 mi13:28:532:36:557:5111:26
8:25
+0:17
21M
21.00 mi13:38:012:46:037:549:08
9:08
+0:43
35K
21.75 mi13:44:072:52:097:556:06
8:09
-0:59
23M
23.00 mi13:55:053:03:077:5810:58
8:46
+0:37
24M
24.00 mi14:03:363:11:387:598:31
8:31
-0:15
40K
24.85 mi14:10:593:19:018:007:23
8:38
+0:07
25.2M
25.20 mi14:14:103:22:128:013:11
9:14
+0:36
Finish
26.22 mi14:22:363:30:388:028:26
8:17
-0:57

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

7:34 /mi

Average Pace

8:02 /mi

Slowest Pace

9:14 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:00:13

57% of race

Time at Steady Pace

39:48

19% of race

Time at Slower Pace

50:37

24% of race

Average Pace: 8:02 /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 mi11:16:0424:067:4524:06
7:45
#11996
10K
6.21 mi11:39:3547:377:4023:31
7:34
#11467
15K
9.32 mi12:03:341:11:367:4123:59
7:43
#11632
20K
12.43 mi12:27:451:35:477:4224:11
7:47
#11592
Half
13.11 mi12:33:041:41:067:435:19
7:48
#11637
25K
15.53 mi12:52:112:00:137:4419:07
7:53
#11612
30K
18.64 mi13:17:272:25:297:4825:16
8:08
#11649
20M
20.00 mi13:28:532:36:557:5111:26
8:25
#11762
21M
21.00 mi13:38:012:46:037:549:08
9:08
#11931
35K
21.75 mi13:44:072:52:097:556:06
8:09
#11970
23M
23.00 mi13:55:053:03:077:5810:58
8:46
#12150
24M
24.00 mi14:03:363:11:387:598:31
8:31
#12272
40K
24.85 mi14:10:593:19:018:007:23
8:38
#12345
25.2M
25.20 mi14:14:103:22:128:013:11
9:14
#12367
Finish
26.22 mi14:22:363:30:388:028:26
8:17
#12437
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi119962868286812024(Top 45%)2914(Top 26%)2914(Top 60%)
10K6.21 mi3.10 mi11467+5292587+2812587+28111067(Top 42%)2354(Top 21%)2354(Top 48%)
15K9.32 mi3.11 mi11632-1652683-962683-9612024(Top 45%)2914(Top 26%)2914(Top 60%)
20K12.43 mi3.11 mi11592+402679+42679+411624(Top 44%)2754(Top 24%)2754(Top 56%)
Half13.11 mi0.68 mi11637-452706-272706-2712725(Top 48%)3331(Top 29%)3331(Top 68%)
25K15.53 mi2.42 mi11612+252706270611820(Top 44%)2973(Top 26%)2973(Top 61%)
30K18.64 mi3.11 mi11649-372776-702776-7011887(Top 45%)3118(Top 27%)3118(Top 64%)
20M20.00 mi1.36 mi11762-1132860-842860-8413103(Top 49%)3910(Top 34%)3910(Top 80%)
21M21.00 mi1.00 mi11931-1692972-1122972-11214128(Top 53%)4548(Top 40%)4548(Top 93%)
35K21.75 mi0.75 mi11970-393004-323004-3213164(Top 49%)4085(Top 36%)4085(Top 84%)
23M23.00 mi1.25 mi12150-1803139-1353139-13514758(Top 55%)5034(Top 44%)5034(Top 103%)
24M24.00 mi1.00 mi12272-1223227-883227-8814568(Top 55%)4990(Top 44%)4990(Top 102%)
40K24.85 mi0.85 mi12345-733283-563283-5614168(Top 53%)4830(Top 42%)4830(Top 99%)
25.2M25.20 mi0.35 mi12367-223307-243307-2413827(Top 52%)4638(Top 41%)4638(Top 95%)
Finish26.22 mi1.02 mi12437-703370-633370-6313953(Top 52%)4704(Top 41%)4704(Top 96%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 45%
×21stories
+97ft-345ft

Overall

12024

Females

2914

F18-39

2914

5K→10K

3.1 - 6.2 mi

Top 42%
×5stories
+79ft-138ft

Overall

11067

Females

2354

F18-39

2354

10K→15K

6.2 - 9.3 mi

Top 45%
×3stories
+67ft-78ft

Overall

12024

Females

2914

F18-39

2914

15K→20K

9.3 - 12.4 mi

Top 44%
×5stories
+106ft-86ft

Overall

11624

Females

2754

F18-39

2754

20K→Half

12.4 - 13.1 mi

Top 48%
×2stories
+19ft-37ft

Overall

12725

Females

3331

F18-39

3331

Half→25K

13.1 - 15.5 mi

Top 44%
×4stories
+66ft-88ft

Overall

11820

Females

2973

F18-39

2973

25K→30K

15.5 - 18.6 mi

Top 45%
×9stories
+181ft-148ft

Overall

11887

Females

3118

F18-39

3118

30K→20M

18.6 - 20.0 mi

Top 49%
×5stories
+64ft-50ft

Overall

13103

Females

3910

F18-39

3910

20M→21M

20.0 - 21.0 mi

Top 53%
×8stories
+106ft-24ft

Overall

14128

Females

4548

F18-39

4548

21M→35K

21.0 - 21.8 mi

Top 49%
×7stories
+17ft-86ft

Overall

13164

Females

4085

F18-39

4085

35K→23M

21.8 - 23.0 mi

Top 55%
×5stories
+23ft-63ft

Overall

14758

Females

5034

F18-39

5034

23M→24M

23.0 - 24.0 mi

Top 55%
×6stories
+12ft-82ft

Overall

14568

Females

4990

F18-39

4990

24M→40K

24.0 - 24.9 mi

Top 53%
×1story
+6ft-20ft

Overall

14168

Females

4830

F18-39

4830

40K→25.2M

24.9 - 25.2 mi

Top 52%
×1story
+13ft-16ft

Overall

13827

Females

4638

F18-39

4638

25.2M→Finish

25.2 - 26.2 mi

Top 52%
×2stories
+22ft-21ft

Overall

13953

Females

4704

F18-39

4704

Passing Analysis

Category:
Athletes Passed
1613
Passed By
2054
Net Change
-441
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11996
5K → 10K646117+529#11996#11467
10K → 15K121286-165#11467#11632
15K → 20K174134+40#11632#11592
20K → Half1964-45#11592#11637
Half → 25K156131+25#11637#11612
25K → 30K160197-37#11612#11649
30K → 20M72185-113#11649#11762
20M → 21M42211-169#11762#11931
21M → 35K3372-39#11931#11970
35K → 23M45225-180#11970#12150
23M → 24M33155-122#12150#12272
24M → 40K39112-73#12272#12345
40K → 25.2M2547-22#12345#12367
25.2M → Finish48118-70#12367#12437
TOTALS16132054-441
📊

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