Boston Marathon logo
BOSTON MARATHON 2023

Emily Centrella

Bib: 25922•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
32:19
Rank: #24479
Start → 5K
32:19 | 10:24/mi
10K· 6.21 mi
1:04:41
Rank: #24511 (-32)
5K → 10K
32:22 | 10:25/mi
15K· 9.32 mi
1:37:18
Rank: #24524 (-13)
10K → 15K
32:37 | 10:30/mi
20K· 12.43 mi
2:10:03
Rank: #24357 (+167)
15K → 20K
32:45 | 10:32/mi
Half· 13.11 mi
2:17:11
Rank: #24347 (+10)
20K → Half
7:08 | 10:27/mi
25K· 15.53 mi
2:42:58
Rank: #24152 (+195)
Half → 25K
25:47 | 10:38/mi
30K· 18.64 mi
3:16:53
Rank: #23931 (+221)
25K → 30K
33:55 | 10:55/mi
20M
3:31:35
Rank: #23813 (+118)
30K → 20M
14:42 | 10:49/mi
21M
3:42:47
Rank: #23673 (+140)
20M → 21M
11:12 | 11:12/mi
35K· 21.75 mi
3:50:50
Rank: #23657 (+16)
21M → 35K
8:03 | 10:46/mi
23M
4:04:21
Rank: #23578 (+79)
35K → 23M
13:31 | 10:48/mi
24M
4:15:03
Rank: #23550 (+28)
23M → 24M
10:42 | 10:42/mi
40K· 24.85 mi
4:24:04
Rank: #23474 (+76)
24M → 40K
9:01 | 10:33/mi
25.2M
4:27:54
Rank: #23429 (+45)
40K → 25.2M
3:50 | 11:07/mi
Finish· 26.22 mi
4:37:55
Rank: #23360 (+69)
25.2M → Finish
10:01 | 9:50/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
Time2:17:11
Pace10:28 /mi
2nd Half
Distance13.11 mi
Time2:20:44
Pace10:44 /mi
📊Positive Split: 2.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:54:0232:1910:2432:19
10:24
-
10K
6.21 mi12:26:241:04:4110:2532:22
10:25
+0:01
15K
9.32 mi12:59:011:37:1810:2632:37
10:30
+0:05
20K
12.43 mi13:31:462:10:0310:2832:45
10:32
+0:02
Half
13.11 mi13:38:542:17:1110:287:08
10:27
-0:05
25K
15.53 mi14:04:412:42:5810:2925:47
10:38
+0:11
30K
18.64 mi14:38:363:16:5310:3433:55
10:55
+0:17
20M
20.00 mi14:53:183:31:3510:3514:42
10:49
-0:06
21M
21.00 mi15:04:303:42:4710:3711:12
11:12
+0:23
35K
21.75 mi15:12:333:50:5010:378:03
10:46
-0:26
23M
23.00 mi15:26:044:04:2110:3713:31
10:48
+0:02
24M
24.00 mi15:36:464:15:0310:3810:42
10:42
-0:06
40K
24.85 mi15:45:474:24:0410:379:01
10:33
-0:09
25.2M
25.20 mi15:49:374:27:5410:383:50
11:07
+0:34
Finish
26.22 mi15:59:384:37:5510:3610:01
9:50
-1:17

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

9:50 /mi

Average Pace

10:36 /mi

Slowest Pace

11:12 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:48:58

82% of race

Time at Steady Pace

48:57

18% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 10:36 /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 mi11:54:0232:1910:2432:19
10:24
#24479
10K
6.21 mi12:26:241:04:4110:2532:22
10:25
#24511
15K
9.32 mi12:59:011:37:1810:2632:37
10:30
#24524
20K
12.43 mi13:31:462:10:0310:2832:45
10:32
#24357
Half
13.11 mi13:38:542:17:1110:287:08
10:27
#24347
25K
15.53 mi14:04:412:42:5810:2925:47
10:38
#24152
30K
18.64 mi14:38:363:16:5310:3433:55
10:55
#23931
20M
20.00 mi14:53:183:31:3510:3514:42
10:49
#23813
21M
21.00 mi15:04:303:42:4710:3711:12
11:12
#23673
35K
21.75 mi15:12:333:50:5010:378:03
10:46
#23657
23M
23.00 mi15:26:044:04:2110:3713:31
10:48
#23578
24M
24.00 mi15:36:464:15:0310:3810:42
10:42
#23550
40K
24.85 mi15:45:474:24:0410:379:01
10:33
#23474
25.2M
25.20 mi15:49:374:27:5410:383:50
11:07
#23429
Finish
26.22 mi15:59:384:37:5510:3610:01
9:50
#23360
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi24479101421014224453(Top 92%)10151(Top 89%)10151(Top 208%)
10K6.21 mi3.10 mi24511-3210165-2310165-2324530(Top 92%)10182(Top 89%)10182(Top 208%)
15K9.32 mi3.11 mi24524-1310175-1010175-1024453(Top 92%)10151(Top 89%)10151(Top 208%)
20K12.43 mi3.11 mi24357+16710096+7910096+7923906(Top 90%)9846(Top 86%)9846(Top 202%)
Half13.11 mi0.68 mi24347+1010090+610090+624136(Top 91%)9988(Top 87%)9988(Top 205%)
25K15.53 mi2.42 mi24152+1959992+989992+9823416(Top 88%)9621(Top 84%)9621(Top 197%)
30K18.64 mi3.11 mi23931+2219878+1149878+11422965(Top 86%)9447(Top 83%)9447(Top 193%)
20M20.00 mi1.36 mi23813+1189821+579821+5722387(Top 84%)9189(Top 80%)9189(Top 188%)
21M21.00 mi1.00 mi23673+1409756+659756+6521281(Top 80%)8615(Top 75%)8615(Top 176%)
35K21.75 mi0.75 mi23657+169755+19755+122861(Top 86%)9522(Top 83%)9522(Top 195%)
23M23.00 mi1.25 mi23578+799711+449711+4421971(Top 83%)9058(Top 79%)9058(Top 185%)
24M24.00 mi1.00 mi23550+289709+29709+222465(Top 84%)9348(Top 82%)9348(Top 191%)
40K24.85 mi0.85 mi23474+769682+279682+2721339(Top 80%)8804(Top 77%)8804(Top 180%)
25.2M25.20 mi0.35 mi23429+459665+179665+1720764(Top 78%)8470(Top 74%)8470(Top 173%)
Finish26.22 mi1.02 mi23360+699642+239642+2321274(Top 80%)8706(Top 76%)8706(Top 178%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 92%
×21stories
+97ft-345ft

Overall

24453

Females

10151

F18-39

10151

5K→10K

3.1 - 6.2 mi

Top 92%
×5stories
+79ft-138ft

Overall

24530

Females

10182

F18-39

10182

10K→15K

6.2 - 9.3 mi

Top 92%
×3stories
+67ft-78ft

Overall

24453

Females

10151

F18-39

10151

15K→20K

9.3 - 12.4 mi

Top 90%
×5stories
+106ft-86ft

Overall

23906

Females

9846

F18-39

9846

20K→Half

12.4 - 13.1 mi

Top 91%
×2stories
+19ft-37ft

Overall

24136

Females

9988

F18-39

9988

Half→25K

13.1 - 15.5 mi

Top 88%
×4stories
+66ft-88ft

Overall

23416

Females

9621

F18-39

9621

25K→30K

15.5 - 18.6 mi

Top 86%
×9stories
+181ft-148ft

Overall

22965

Females

9447

F18-39

9447

30K→20M

18.6 - 20.0 mi

Top 84%
×5stories
+64ft-50ft

Overall

22387

Females

9189

F18-39

9189

20M→21M

20.0 - 21.0 mi

Top 80%
×8stories
+106ft-24ft

Overall

21281

Females

8615

F18-39

8615

21M→35K

21.0 - 21.8 mi

Top 86%
×7stories
+17ft-86ft

Overall

22861

Females

9522

F18-39

9522

35K→23M

21.8 - 23.0 mi

Top 83%
×5stories
+23ft-63ft

Overall

21971

Females

9058

F18-39

9058

23M→24M

23.0 - 24.0 mi

Top 84%
×6stories
+12ft-82ft

Overall

22465

Females

9348

F18-39

9348

24M→40K

24.0 - 24.9 mi

Top 80%
×1story
+6ft-20ft

Overall

21339

Females

8804

F18-39

8804

40K→25.2M

24.9 - 25.2 mi

Top 78%
×1story
+13ft-16ft

Overall

20764

Females

8470

F18-39

8470

25.2M→Finish

25.2 - 26.2 mi

Top 80%
×2stories
+22ft-21ft

Overall

21274

Females

8706

F18-39

8706

Passing Analysis

Category:
Athletes Passed
1600
Passed By
481
Net Change
+1119
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24479
5K → 10K175207-32#24479#24511
10K → 15K127140-13#24511#24524
15K → 20K19730+167#24524#24357
20K → Half2414+10#24357#24347
Half → 25K20712+195#24347#24152
25K → 30K23716+221#24152#23931
30K → 20M1235+118#23931#23813
20M → 21M1444+140#23813#23673
21M → 35K2913+16#23673#23657
35K → 23M9415+79#23657#23578
23M → 24M4214+28#23578#23550
24M → 40K815+76#23550#23474
40K → 25.2M450+45#23474#23429
25.2M → Finish756+69#23429#23360
TOTALS1600481+1119
📊

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