Boston Marathon logo
BOSTON MARATHON 2023

Katy Kelly

Bib: 23221•F

MA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 37%
Masters (Masters Women)
#0 / 6539
Top 23%
Division (F55-59)
#0 / 815
Top 7%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:38
Rank: #15820
Start → 5K
25:38 | 8:15/mi
10K· 6.21 mi
50:33
Rank: #15351 (+469)
5K → 10K
24:55 | 8:01/mi
15K· 9.32 mi
1:15:30
Rank: #15122 (+229)
10K → 15K
24:57 | 8:02/mi
20K· 12.43 mi
1:41:08
Rank: #15158 (-36)
15K → 20K
25:38 | 8:15/mi
Half· 13.11 mi
1:46:38
Rank: #15136 (+22)
20K → Half
5:30 | 8:04/mi
25K· 15.53 mi
2:06:35
Rank: #14978 (+158)
Half → 25K
19:57 | 8:14/mi
30K· 18.64 mi
2:33:36
Rank: #15074 (-96)
25K → 30K
27:01 | 8:42/mi
20M
2:44:51
Rank: #14854 (+220)
30K → 20M
11:15 | 8:17/mi
21M
2:53:33
Rank: #14658 (+196)
20M → 21M
8:42 | 8:42/mi
35K· 21.75 mi
2:59:38
Rank: #14580 (+78)
21M → 35K
6:05 | 8:08/mi
23M
3:09:51
Rank: #14365 (+215)
35K → 23M
10:13 | 8:10/mi
24M
3:17:56
Rank: #14225 (+140)
23M → 24M
8:05 | 8:05/mi
40K· 24.85 mi
3:24:47
Rank: #14051 (+174)
24M → 40K
6:51 | 8:01/mi
25.2M
3:27:45
Rank: #13974 (+77)
40K → 25.2M
2:58 | 8:36/mi
Finish· 26.22 mi
3:35:37
Rank: #13808 (+166)
25.2M → Finish
7:52 | 7:43/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
Time1:46:38
Pace8:08 /mi
2nd Half
Distance13.11 mi
Time1:48:59
Pace8:19 /mi
📊Positive Split: 2.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:20:2025:388:1525:38
8:15
-
10K
6.21 mi11:45:1550:338:0824:55
8:01
-0:14
15K
9.32 mi12:10:121:15:308:0624:57
8:02
+0:01
20K
12.43 mi12:35:501:41:088:0825:38
8:15
+0:13
Half
13.11 mi12:41:201:46:388:085:30
8:04
-0:11
25K
15.53 mi13:01:172:06:358:0919:57
8:14
+0:10
30K
18.64 mi13:28:182:33:368:1427:01
8:42
+0:28
20M
20.00 mi13:39:332:44:518:1511:15
8:17
-0:25
21M
21.00 mi13:48:152:53:338:168:42
8:42
+0:25
35K
21.75 mi13:54:202:59:388:166:05
8:08
-0:34
23M
23.00 mi14:04:333:09:518:1510:13
8:10
+0:02
24M
24.00 mi14:12:383:17:568:158:05
8:05
-0:05
40K
24.85 mi14:19:293:24:478:146:51
8:01
-0:04
25.2M
25.20 mi14:22:273:27:458:152:58
8:36
+0:35
Finish
26.22 mi14:30:193:35:378:147:52
7:43
-0:53

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

7:43 /mi

Average Pace

8:14 /mi

Slowest Pace

8:42 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:56:56

82% of race

Time at Steady Pace

38:41

18% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:13 /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 mi11:20:2025:388:1525:38
8:15
#15820
10K
6.21 mi11:45:1550:338:0824:55
8:01
#15351
15K
9.32 mi12:10:121:15:308:0624:57
8:02
#15122
20K
12.43 mi12:35:501:41:088:0825:38
8:15
#15158
Half
13.11 mi12:41:201:46:388:085:30
8:04
#15136
25K
15.53 mi13:01:172:06:358:0919:57
8:14
#14978
30K
18.64 mi13:28:182:33:368:1427:01
8:42
#15074
20M
20.00 mi13:39:332:44:518:1511:15
8:17
#14854
21M
21.00 mi13:48:152:53:338:168:42
8:42
#14658
35K
21.75 mi13:54:202:59:388:166:05
8:08
#14580
23M
23.00 mi14:04:333:09:518:1510:13
8:10
#14365
24M
24.00 mi14:12:383:17:568:158:05
8:05
#14225
40K
24.85 mi14:19:293:24:478:146:51
8:01
#14051
25.2M
25.20 mi14:22:273:27:458:152:58
8:36
#13974
Finish
26.22 mi14:30:193:35:378:147:52
7:43
#13808
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi158205164516414648(Top 55%)4472(Top 39%)4472(Top 549%)
10K6.21 mi3.10 mi15351+4694871+2934871+29314958(Top 56%)4645(Top 41%)4645(Top 570%)
15K9.32 mi3.11 mi15122+2294739+1324739+13214648(Top 55%)4472(Top 39%)4472(Top 549%)
20K12.43 mi3.11 mi15158-364782-434782-4315276(Top 57%)4880(Top 43%)4880(Top 599%)
Half13.11 mi0.68 mi15136+224767+154767+1514884(Top 56%)4604(Top 40%)4604(Top 565%)
25K15.53 mi2.42 mi14978+1584697+704697+7014448(Top 54%)4475(Top 39%)4475(Top 549%)
30K18.64 mi3.11 mi15074-964803-1064803-10615493(Top 58%)5213(Top 46%)5213(Top 640%)
20M20.00 mi1.36 mi14854+2204673+1304673+13012257(Top 46%)3439(Top 30%)3439(Top 422%)
21M21.00 mi1.00 mi14658+1964583+904583+9011708(Top 44%)3259(Top 29%)3259(Top 400%)
35K21.75 mi0.75 mi14580+784552+314552+3113043(Top 49%)4029(Top 35%)4029(Top 494%)
23M23.00 mi1.25 mi14365+2154452+1004452+10010929(Top 41%)2996(Top 26%)2996(Top 368%)
24M24.00 mi1.00 mi14225+1404383+694383+6911873(Top 45%)3535(Top 31%)3535(Top 434%)
40K24.85 mi0.85 mi14051+1744303+804303+8010187(Top 38%)2759(Top 24%)2759(Top 339%)
25.2M25.20 mi0.35 mi13974+774258+454258+4510281(Top 39%)2861(Top 25%)2861(Top 351%)
Finish26.22 mi1.02 mi13808+1664175+834175+8310148(Top 38%)2779(Top 24%)2779(Top 341%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 55%
×21stories
+97ft-345ft

Overall

14648

Females

4472

F55-59

4472

5K→10K

3.1 - 6.2 mi

Top 56%
×5stories
+79ft-138ft

Overall

14958

Females

4645

F55-59

4645

10K→15K

6.2 - 9.3 mi

Top 55%
×3stories
+67ft-78ft

Overall

14648

Females

4472

F55-59

4472

15K→20K

9.3 - 12.4 mi

Top 57%
×5stories
+106ft-86ft

Overall

15276

Females

4880

F55-59

4880

20K→Half

12.4 - 13.1 mi

Top 56%
×2stories
+19ft-37ft

Overall

14884

Females

4604

F55-59

4604

Half→25K

13.1 - 15.5 mi

Top 54%
×4stories
+66ft-88ft

Overall

14448

Females

4475

F55-59

4475

25K→30K

15.5 - 18.6 mi

Top 58%
×9stories
+181ft-148ft

Overall

15493

Females

5213

F55-59

5213

30K→20M

18.6 - 20.0 mi

Top 46%
×5stories
+64ft-50ft

Overall

12257

Females

3439

F55-59

3439

20M→21M

20.0 - 21.0 mi

Top 44%
×8stories
+106ft-24ft

Overall

11708

Females

3259

F55-59

3259

21M→35K

21.0 - 21.8 mi

Top 49%
×7stories
+17ft-86ft

Overall

13043

Females

4029

F55-59

4029

35K→23M

21.8 - 23.0 mi

Top 41%
×5stories
+23ft-63ft

Overall

10929

Females

2996

F55-59

2996

23M→24M

23.0 - 24.0 mi

Top 45%
×6stories
+12ft-82ft

Overall

11873

Females

3535

F55-59

3535

24M→40K

24.0 - 24.9 mi

Top 38%
×1story
+6ft-20ft

Overall

10187

Females

2759

F55-59

2759

40K→25.2M

24.9 - 25.2 mi

Top 39%
×1story
+13ft-16ft

Overall

10281

Females

2861

F55-59

2861

25.2M→Finish

25.2 - 26.2 mi

Top 38%
×2stories
+22ft-21ft

Overall

10148

Females

2779

F55-59

2779

Passing Analysis

Category:
Athletes Passed
2838
Passed By
826
Net Change
+2012
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15820
5K → 10K601132+469#15820#15351
10K → 15K31687+229#15351#15122
15K → 20K175211-36#15122#15158
20K → Half5230+22#15158#15136
Half → 25K21860+158#15136#14978
25K → 30K142238-96#14978#15074
30K → 20M2266+220#15074#14854
20M → 21M20913+196#14854#14658
21M → 35K835+78#14658#14580
35K → 23M2205+215#14580#14365
23M → 24M15717+140#14365#14225
24M → 40K1817+174#14225#14051
40K → 25.2M847+77#14051#13974
25.2M → Finish1748+166#13974#13808
TOTALS2838826+2012
📊

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