Boston Marathon logo
BOSTON MARATHON 2023

Karen Sullivan

Bib: 17068•F

CA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 36%
Masters (Masters Women)
#0 / 6539
Top 23%
Division (F40-44)
#0 / 1878
Top 41%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:41
Rank: #13626
Start → 5K
24:41 | 7:57/mi
10K· 6.21 mi
49:31
Rank: #14155 (-529)
5K → 10K
24:50 | 8:00/mi
15K· 9.32 mi
1:13:56
Rank: #13845 (+310)
10K → 15K
24:25 | 7:52/mi
20K· 12.43 mi
1:38:34
Rank: #13558 (+287)
15K → 20K
24:38 | 7:56/mi
Half· 13.11 mi
1:44:01
Rank: #13588 (-30)
20K → Half
5:27 | 7:59/mi
25K· 15.53 mi
2:03:28
Rank: #13454 (+134)
Half → 25K
19:27 | 8:01/mi
30K· 18.64 mi
2:29:07
Rank: #13301 (+153)
25K → 30K
25:39 | 8:15/mi
20M
2:40:30
Rank: #13241 (+60)
30K → 20M
11:23 | 8:23/mi
21M
2:49:22
Rank: #13164 (+77)
20M → 21M
8:52 | 8:52/mi
35K· 21.75 mi
2:55:36
Rank: #13209 (-45)
21M → 35K
6:14 | 8:20/mi
23M
3:07:44
Rank: #13694 (-485)
35K → 23M
12:08 | 9:41/mi
24M
3:16:10
Rank: #13689 (+5)
23M → 24M
8:26 | 8:26/mi
40K· 24.85 mi
3:23:31
Rank: #13675 (+14)
24M → 40K
7:21 | 8:36/mi
25.2M
3:26:40
Rank: #13660 (+15)
40K → 25.2M
3:09 | 9:08/mi
Finish· 26.22 mi
3:35:11
Rank: #13683 (-23)
25.2M → Finish
8:31 | 8:21/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
Time1:44:01
Pace7:56 /mi
2nd Half
Distance13.11 mi
Time1:51:10
Pace8:29 /mi
📊Positive Split: 6.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:0424:417:5724:41
7:57
-
10K
6.21 mi11:40:5449:317:5824:50
8:00
+0:03
15K
9.32 mi12:05:191:13:567:5624:25
7:52
-0:08
20K
12.43 mi12:29:571:38:347:5624:38
7:56
+0:04
Half
13.11 mi12:35:241:44:017:565:27
7:59
+0:03
25K
15.53 mi12:54:512:03:287:5719:27
8:01
+0:02
30K
18.64 mi13:20:302:29:078:0025:39
8:15
+0:14
20M
20.00 mi13:31:532:40:308:0111:23
8:23
+0:08
21M
21.00 mi13:40:452:49:228:048:52
8:52
+0:29
35K
21.75 mi13:46:592:55:368:046:14
8:20
-0:32
23M
23.00 mi13:59:073:07:448:1012:08
9:41
+1:21
24M
24.00 mi14:07:333:16:108:108:26
8:26
-1:15
40K
24.85 mi14:14:543:23:318:117:21
8:36
+0:10
25.2M
25.20 mi14:18:033:26:408:123:09
9:08
+0:32
Finish
26.22 mi14:26:343:35:118:138:31
8:21
-0:47

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

7:52 /mi

Average Pace

8:13 /mi

Slowest Pace

9:41 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:03:28

57% of race

Time at Steady Pace

1:00:13

28% of race

Time at Slower Pace

31:30

15% of race

Average Pace: 8:12 /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 mi11:16:0424:417:5724:41
7:57
#13626
10K
6.21 mi11:40:5449:317:5824:50
8:00
#14155
15K
9.32 mi12:05:191:13:567:5624:25
7:52
#13845
20K
12.43 mi12:29:571:38:347:5624:38
7:56
#13558
Half
13.11 mi12:35:241:44:017:565:27
7:59
#13588
25K
15.53 mi12:54:512:03:287:5719:27
8:01
#13454
30K
18.64 mi13:20:302:29:078:0025:39
8:15
#13301
20M
20.00 mi13:31:532:40:308:0111:23
8:23
#13241
21M
21.00 mi13:40:452:49:228:048:52
8:52
#13164
35K
21.75 mi13:46:592:55:368:046:14
8:20
#13209
23M
23.00 mi13:59:073:07:448:1012:08
9:41
#13694
24M
24.00 mi14:07:333:16:108:108:26
8:26
#13689
40K
24.85 mi14:14:543:23:318:117:21
8:36
#13675
25.2M
25.20 mi14:18:033:26:408:123:09
9:08
#13660
Finish
26.22 mi14:26:343:35:118:138:31
8:21
#13683
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi136263800380013205(Top 50%)3612(Top 32%)3612(Top 192%)
10K6.21 mi3.10 mi14155-5294136-3364136-33614768(Top 55%)4521(Top 40%)4521(Top 241%)
15K9.32 mi3.11 mi13845+3103964+1723964+17213205(Top 50%)3612(Top 32%)3612(Top 192%)
20K12.43 mi3.11 mi13558+2873819+1453819+14512876(Top 48%)3481(Top 30%)3481(Top 185%)
Half13.11 mi0.68 mi13588-303834-153834-1514322(Top 54%)4266(Top 37%)4266(Top 227%)
25K15.53 mi2.42 mi13454+1343777+573777+5712948(Top 49%)3605(Top 32%)3605(Top 192%)
30K18.64 mi3.11 mi13301+1533730+473730+4712740(Top 48%)3606(Top 32%)3606(Top 192%)
20M20.00 mi1.36 mi13241+603703+273703+2712895(Top 48%)3805(Top 33%)3805(Top 203%)
21M21.00 mi1.00 mi13164+773674+293674+2912684(Top 48%)3780(Top 33%)3780(Top 201%)
35K21.75 mi0.75 mi13209-453719-453719-4514301(Top 54%)4718(Top 41%)4718(Top 251%)
23M23.00 mi1.25 mi13694-4854038-3194038-31919047(Top 72%)7430(Top 65%)7430(Top 396%)
24M24.00 mi1.00 mi13689+54057-194057-1914092(Top 53%)4719(Top 41%)4719(Top 251%)
40K24.85 mi0.85 mi13675+144069-124069-1213953(Top 52%)4716(Top 41%)4716(Top 251%)
25.2M25.20 mi0.35 mi13660+154063+64063+613317(Top 50%)4388(Top 38%)4388(Top 234%)
Finish26.22 mi1.02 mi13683-234102-394102-3914469(Top 54%)4977(Top 44%)4977(Top 265%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 50%
×21stories
+97ft-345ft

Overall

13205

Females

3612

F40-44

3612

5K→10K

3.1 - 6.2 mi

Top 55%
×5stories
+79ft-138ft

Overall

14768

Females

4521

F40-44

4521

10K→15K

6.2 - 9.3 mi

Top 50%
×3stories
+67ft-78ft

Overall

13205

Females

3612

F40-44

3612

15K→20K

9.3 - 12.4 mi

Top 48%
×5stories
+106ft-86ft

Overall

12876

Females

3481

F40-44

3481

20K→Half

12.4 - 13.1 mi

Top 54%
×2stories
+19ft-37ft

Overall

14322

Females

4266

F40-44

4266

Half→25K

13.1 - 15.5 mi

Top 49%
×4stories
+66ft-88ft

Overall

12948

Females

3605

F40-44

3605

25K→30K

15.5 - 18.6 mi

Top 48%
×9stories
+181ft-148ft

Overall

12740

Females

3606

F40-44

3606

30K→20M

18.6 - 20.0 mi

Top 48%
×5stories
+64ft-50ft

Overall

12895

Females

3805

F40-44

3805

20M→21M

20.0 - 21.0 mi

Top 48%
×8stories
+106ft-24ft

Overall

12684

Females

3780

F40-44

3780

21M→35K

21.0 - 21.8 mi

Top 54%
×7stories
+17ft-86ft

Overall

14301

Females

4718

F40-44

4718

35K→23M

21.8 - 23.0 mi

Top 72%
×5stories
+23ft-63ft

Overall

19047

Females

7430

F40-44

7430

23M→24M

23.0 - 24.0 mi

Top 53%
×6stories
+12ft-82ft

Overall

14092

Females

4719

F40-44

4719

24M→40K

24.0 - 24.9 mi

Top 52%
×1story
+6ft-20ft

Overall

13953

Females

4716

F40-44

4716

40K→25.2M

24.9 - 25.2 mi

Top 50%
×1story
+13ft-16ft

Overall

13317

Females

4388

F40-44

4388

25.2M→Finish

25.2 - 26.2 mi

Top 54%
×2stories
+22ft-21ft

Overall

14469

Females

4977

F40-44

4977

Passing Analysis

Category:
Athletes Passed
1840
Passed By
1897
Net Change
-57
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13626
5K → 10K100629-529#13626#14155
10K → 15K37868+310#14155#13845
15K → 20K33952+287#13845#13558
20K → Half2252-30#13558#13588
Half → 25K19561+134#13588#13454
25K → 30K267114+153#13454#13301
30K → 20M11858+60#13301#13241
20M → 21M12245+77#13241#13164
21M → 35K4388-45#13164#13209
35K → 23M15500-485#13209#13694
23M → 24M6964+5#13694#13689
24M → 40K6753+14#13689#13675
40K → 25.2M4429+15#13675#13660
25.2M → Finish6184-23#13660#13683
TOTALS18401897-57
📊

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