Boston Marathon logo
BOSTON MARATHON 2023

Kathryn Gray

Bib: 11845•F

CO

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 41%
Gender (Female)
#0 / 11423
Top 23%
Masters (Masters Women)
#0 / 6539
Top 11%
Division (F40-44)
#0 / 1878
Top 21%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:08
Rank: #12072
Start → 5K
24:08 | 7:46/mi
10K· 6.21 mi
47:34
Rank: #11395 (+677)
5K → 10K
23:26 | 7:33/mi
15K· 9.32 mi
1:10:45
Rank: #10852 (+543)
10K → 15K
23:11 | 7:28/mi
20K· 12.43 mi
1:35:41
Rank: #11533 (-681)
15K → 20K
24:56 | 8:02/mi
Half· 13.11 mi
1:40:47
Rank: #11441 (+92)
20K → Half
5:06 | 7:29/mi
25K· 15.53 mi
1:59:30
Rank: #11240 (+201)
Half → 25K
18:43 | 7:43/mi
30K· 18.64 mi
2:24:03
Rank: #10983 (+257)
25K → 30K
24:33 | 7:54/mi
20M
2:35:01
Rank: #10936 (+47)
30K → 20M
10:58 | 8:04/mi
21M
2:43:44
Rank: #10978 (-42)
20M → 21M
8:43 | 8:43/mi
35K· 21.75 mi
2:49:43
Rank: #11011 (-33)
21M → 35K
5:59 | 8:00/mi
23M
2:59:54
Rank: #10964 (+47)
35K → 23M
10:11 | 8:08/mi
24M
3:07:50
Rank: #10948 (+16)
23M → 24M
7:56 | 7:56/mi
40K· 24.85 mi
3:14:55
Rank: #10989 (-41)
24M → 40K
7:05 | 8:17/mi
25.2M
3:17:56
Rank: #10965 (+24)
40K → 25.2M
3:01 | 8:45/mi
Finish· 26.22 mi
3:26:02
Rank: #10986 (-21)
25.2M → Finish
8:06 | 7:57/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
Time1:40:47
Pace7:41 /mi
2nd Half
Distance13.11 mi
Time1:45:15
Pace8:02 /mi
📊Positive Split: 4.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:5024:087:4624:08
7:46
-
10K
6.21 mi11:15:1647:347:3923:26
7:33
-0:13
15K
9.32 mi11:38:271:10:457:3523:11
7:28
-0:05
20K
12.43 mi12:03:231:35:417:4224:56
8:02
+0:34
Half
13.11 mi12:08:291:40:477:415:06
7:29
-0:33
25K
15.53 mi12:27:121:59:307:4218:43
7:43
+0:14
30K
18.64 mi12:51:452:24:037:4424:33
7:54
+0:11
20M
20.00 mi13:02:432:35:017:4510:58
8:04
+0:10
21M
21.00 mi13:11:262:43:447:488:43
8:43
+0:39
35K
21.75 mi13:17:252:49:437:485:59
8:00
-0:43
23M
23.00 mi13:27:362:59:547:4910:11
8:08
+0:08
24M
24.00 mi13:35:323:07:507:507:56
7:56
-0:12
40K
24.85 mi13:42:373:14:557:517:05
8:17
+0:21
25.2M
25.20 mi13:45:383:17:567:513:01
8:45
+0:28
Finish
26.22 mi13:53:443:26:027:528:06
7:57
-0:48

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

7:28 /mi

Average Pace

7:52 /mi

Slowest Pace

8:45 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:07:13

91% of race

Time at Steady Pace

18:49

9% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:51 /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 mi10:51:5024:087:4624:08
7:46
#12072
10K
6.21 mi11:15:1647:347:3923:26
7:33
#11395
15K
9.32 mi11:38:271:10:457:3523:11
7:28
#10852
20K
12.43 mi12:03:231:35:417:4224:56
8:02
#11533
Half
13.11 mi12:08:291:40:477:415:06
7:29
#11441
25K
15.53 mi12:27:121:59:307:4218:43
7:43
#11240
30K
18.64 mi12:51:452:24:037:4424:33
7:54
#10983
20M
20.00 mi13:02:432:35:017:4510:58
8:04
#10936
21M
21.00 mi13:11:262:43:447:488:43
8:43
#10978
35K
21.75 mi13:17:252:49:437:485:59
8:00
#11011
23M
23.00 mi13:27:362:59:547:4910:11
8:08
#10964
24M
24.00 mi13:35:323:07:507:507:56
7:56
#10948
40K
24.85 mi13:42:373:14:557:517:05
8:17
#10989
25.2M
25.20 mi13:45:383:17:567:513:01
8:45
#10965
Finish
26.22 mi13:53:443:26:027:528:06
7:57
#10986
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi12072291029109888(Top 37%)1793(Top 16%)1793(Top 95%)
10K6.21 mi3.10 mi11395+6772542+3682542+36810832(Top 41%)2222(Top 19%)2222(Top 118%)
15K9.32 mi3.11 mi10852+5432262+2802262+2809888(Top 37%)1793(Top 16%)1793(Top 95%)
20K12.43 mi3.11 mi11533-6812642-3802642-38013651(Top 51%)3901(Top 34%)3901(Top 208%)
Half13.11 mi0.68 mi11441+922587+552587+5510116(Top 38%)1952(Top 17%)1952(Top 104%)
25K15.53 mi2.42 mi11240+2012496+912496+9110466(Top 39%)2213(Top 19%)2213(Top 118%)
30K18.64 mi3.11 mi10983+2572396+1002396+10010172(Top 38%)2244(Top 20%)2244(Top 119%)
20M20.00 mi1.36 mi10936+472399-32399-310818(Top 41%)2646(Top 23%)2646(Top 141%)
21M21.00 mi1.00 mi10978-422449-502449-5011774(Top 44%)3280(Top 29%)3280(Top 175%)
35K21.75 mi0.75 mi11011-332479-302479-3012123(Top 46%)3486(Top 31%)3486(Top 186%)
23M23.00 mi1.25 mi10964+472476+32476+310731(Top 40%)2886(Top 25%)2886(Top 154%)
24M24.00 mi1.00 mi10948+162498-222498-2210796(Top 41%)2975(Top 26%)2975(Top 158%)
40K24.85 mi0.85 mi10989-412549-512549-5111931(Top 45%)3621(Top 32%)3621(Top 193%)
25.2M25.20 mi0.35 mi10965+242551-22551-211063(Top 42%)3221(Top 28%)3221(Top 172%)
Finish26.22 mi1.02 mi10986-212584-332584-3311747(Top 44%)3567(Top 31%)3567(Top 190%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 37%
×21stories
+97ft-345ft

Overall

9888

Females

1793

F40-44

1793

5K→10K

3.1 - 6.2 mi

Top 41%
×5stories
+79ft-138ft

Overall

10832

Females

2222

F40-44

2222

10K→15K

6.2 - 9.3 mi

Top 37%
×3stories
+67ft-78ft

Overall

9888

Females

1793

F40-44

1793

15K→20K

9.3 - 12.4 mi

Top 51%
×5stories
+106ft-86ft

Overall

13651

Females

3901

F40-44

3901

20K→Half

12.4 - 13.1 mi

Top 38%
×2stories
+19ft-37ft

Overall

10116

Females

1952

F40-44

1952

Half→25K

13.1 - 15.5 mi

Top 39%
×4stories
+66ft-88ft

Overall

10466

Females

2213

F40-44

2213

25K→30K

15.5 - 18.6 mi

Top 38%
×9stories
+181ft-148ft

Overall

10172

Females

2244

F40-44

2244

30K→20M

18.6 - 20.0 mi

Top 41%
×5stories
+64ft-50ft

Overall

10818

Females

2646

F40-44

2646

20M→21M

20.0 - 21.0 mi

Top 44%
×8stories
+106ft-24ft

Overall

11774

Females

3280

F40-44

3280

21M→35K

21.0 - 21.8 mi

Top 46%
×7stories
+17ft-86ft

Overall

12123

Females

3486

F40-44

3486

35K→23M

21.8 - 23.0 mi

Top 40%
×5stories
+23ft-63ft

Overall

10731

Females

2886

F40-44

2886

23M→24M

23.0 - 24.0 mi

Top 41%
×6stories
+12ft-82ft

Overall

10796

Females

2975

F40-44

2975

24M→40K

24.0 - 24.9 mi

Top 45%
×1story
+6ft-20ft

Overall

11931

Females

3621

F40-44

3621

40K→25.2M

24.9 - 25.2 mi

Top 42%
×1story
+13ft-16ft

Overall

11063

Females

3221

F40-44

3221

25.2M→Finish

25.2 - 26.2 mi

Top 44%
×2stories
+22ft-21ft

Overall

11747

Females

3567

F40-44

3567

Passing Analysis

Category:
Athletes Passed
2558*
Passed By
1472
Net Change
+1086
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12072
5K → 10K76487+677#12072#11395
10K → 15K56825+543#11395#10852
15K → 20K34715-681#10852#11533
20K → Half964+92#11533#11441
Half → 25K23837+201#11441#11240
25K → 30K30649+257#11240#10983
30K → 20M112*65+47#10983#10936
20M → 21M62104-42#10936#10978
21M → 35K3770-33#10978#11011
35K → 23M11063+47#11011#10964
23M → 24M7963+16#10964#10948
24M → 40K4889-41#10948#10989
40K → 25.2M4723+24#10989#10965
25.2M → Finish5778-21#10965#10986
TOTALS2558*1472+1086

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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