Boston Marathon logo
BOSTON MARATHON 2023

Kathleen Winslow

Bib: 23663•F

MA

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

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
8:46/mi
27:14
↑ 97↓ 3451.5%
10K· 6.21 mi
8:47/mi
54:32
↑ 79↓ 1380.4%
15K· 9.32 mi
8:49/mi
1:21:56
↑ 67↓ 78
20K· 12.43 mi
9:06/mi
1:50:11
↑ 106↓ 860.1%
Half· 13.11 mi
9:01/mi
1:56:20
↑ 19↓ 370.5%
25K· 15.53 mi
10:05/mi
2:20:48
↑ 66↓ 880.2%
30K· 18.64 mi
10:27/mi
2:53:15
↑ 181↓ 1480.2%
20M
10:48/mi
3:07:56
↑ 64↓ 500.2%
21M
11:29/mi
3:19:25
↑ 106↓ 241.6%
35K· 21.75 mi
10:35/mi
3:27:20
↑ 17↓ 861.7%
23M
10:34/mi
3:40:34
↑ 23↓ 630.6%
24M
10:17/mi
3:50:51
↓ 821.3%
40K· 24.85 mi
10:34/mi
3:59:53
↓ 200.3%
25.2M
11:04/mi
4:03:42
↑ 13↓ 160.2%
Finish· 26.22 mi
10:08/mi
4:14:02
↑ 22↓ 21

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
Time1:56:20
Pace8:52 /mi
2nd Half
Distance13.11 mi
Time2:17:42
Pace10:30 /mi
📊Positive Split: 18.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:21:5427:148:4627:14
8:46
-
10K
6.21 mi11:49:1254:328:4727:18
8:47
+0:01
15K
9.32 mi12:16:361:21:568:4727:24
8:49
+0:02
20K
12.43 mi12:44:511:50:118:5228:15
9:06
+0:17
Half
13.11 mi12:51:001:56:208:526:09
9:01
-0:05
25K
15.53 mi13:15:282:20:489:0424:28
10:05
+1:04
30K
18.64 mi13:47:552:53:159:1832:27
10:27
+0:22
20M
20.00 mi14:02:363:07:569:2414:41
10:48
+0:21
21M
21.00 mi14:14:053:19:259:3011:29
11:29
+0:41
35K
21.75 mi14:22:003:27:209:327:55
10:35
-0:54
23M
23.00 mi14:35:143:40:349:3513:14
10:34
-0:01
24M
24.00 mi14:45:313:50:519:3710:17
10:17
-0:17
40K
24.85 mi14:54:333:59:539:399:02
10:34
+0:17
25.2M
25.20 mi14:58:224:03:429:403:49
11:04
+0:30
Finish
26.22 mi15:08:424:14:029:4210:20
10:08
-0:56

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

8:46 /mi

Average Pace

9:42 /mi

Slowest Pace

11:29 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:56:20

46% of race

Time at Steady Pace

1:47:43

42% of race

Time at Slower Pace

29:59

12% of race

Average Pace: 9:41 /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 mi11:21:5427:148:4627:14
8:46
#19279
10K
6.21 mi11:49:1254:328:4727:18
8:47
#19559
15K
9.32 mi12:16:361:21:568:4727:24
8:49
#19561
20K
12.43 mi12:44:511:50:118:5228:15
9:06
#19679
Half
13.11 mi12:51:001:56:208:526:09
9:01
#19732
25K
15.53 mi13:15:282:20:489:0424:28
10:05
#20412
30K
18.64 mi13:47:552:53:159:1832:27
10:27
#20803
20M
20.00 mi14:02:363:07:569:2414:41
10:48
#20941
21M
21.00 mi14:14:053:19:259:3011:29
11:29
#21009
35K
21.75 mi14:22:003:27:209:327:55
10:35
#21086
23M
23.00 mi14:35:143:40:349:3513:14
10:34
#21093
24M
24.00 mi14:45:313:50:519:3710:17
10:17
#21105
40K
24.85 mi14:54:333:59:539:399:02
10:34
#21122
25.2M
25.20 mi14:58:224:03:429:403:49
11:04
#21114
Finish
26.22 mi15:08:424:14:029:4210:20
10:08
#21157
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi192797378737819638(Top 74%)7469(Top 65%)7469(Top 916%)
10K6.21 mi3.10 mi19559-2807507-1297507-12919873(Top 75%)7625(Top 67%)7625(Top 936%)
15K9.32 mi3.11 mi19561-27486+217486+2119638(Top 74%)7469(Top 65%)7469(Top 916%)
20K12.43 mi3.11 mi19679-1187533-477533-4720121(Top 76%)7741(Top 68%)7741(Top 950%)
Half13.11 mi0.68 mi19732-537551-187551-1820540(Top 77%)7995(Top 70%)7995(Top 981%)
25K15.53 mi2.42 mi20412-6807943-3927943-39222413(Top 84%)9067(Top 79%)9067(Top 1113%)
30K18.64 mi3.11 mi20803-3918161-2188161-21822099(Top 83%)8956(Top 78%)8956(Top 1099%)
20M20.00 mi1.36 mi20941-1388263-1028263-10222358(Top 84%)9169(Top 80%)9169(Top 1125%)
21M21.00 mi1.00 mi21009-688316-538316-5321861(Top 82%)8922(Top 78%)8922(Top 1095%)
35K21.75 mi0.75 mi21086-778373-578373-5722538(Top 85%)9341(Top 82%)9341(Top 1146%)
23M23.00 mi1.25 mi21093-78384-118384-1121476(Top 81%)8777(Top 77%)8777(Top 1077%)
24M24.00 mi1.00 mi21105-128405-218405-2121530(Top 81%)8862(Top 78%)8862(Top 1087%)
40K24.85 mi0.85 mi21122-178419-148419-1421375(Top 80%)8820(Top 77%)8820(Top 1082%)
25.2M25.20 mi0.35 mi21114+88422-38422-320632(Top 77%)8393(Top 73%)8393(Top 1030%)
Finish26.22 mi1.02 mi21157-438456-348456-3422138(Top 83%)9188(Top 80%)9188(Top 1127%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 74%
×21story building
+97ft-345ft

Overall

19638

Females

7469

F55-59

7469

5K→10K

3.1 - 6.2 mi

Top 75%
×5story building
+79ft-138ft

Overall

19873

Females

7625

F55-59

7625

10K→15K

6.2 - 9.3 mi

Top 74%
×3story building
+67ft-78ft

Overall

19638

Females

7469

F55-59

7469

15K→20K

9.3 - 12.4 mi

Top 76%
×5story building
+106ft-86ft

Overall

20121

Females

7741

F55-59

7741

20K→Half

12.4 - 13.1 mi

Top 77%
×2story building
+19ft-37ft

Overall

20540

Females

7995

F55-59

7995

Half→25K

13.1 - 15.5 mi

Top 84%
×4story building
+66ft-88ft

Overall

22413

Females

9067

F55-59

9067

25K→30K

15.5 - 18.6 mi

Top 83%
×9story building
+181ft-148ft

Overall

22099

Females

8956

F55-59

8956

30K→20M

18.6 - 20.0 mi

Top 84%
×5story building
+64ft-50ft

Overall

22358

Females

9169

F55-59

9169

20M→21M

20.0 - 21.0 mi

Top 82%
×8story building
+106ft-24ft

Overall

21861

Females

8922

F55-59

8922

21M→35K

21.0 - 21.8 mi

Top 85%
×7story building
+17ft-86ft

Overall

22538

Females

9341

F55-59

9341

35K→23M

21.8 - 23.0 mi

Top 81%
×5story building
+23ft-63ft

Overall

21476

Females

8777

F55-59

8777

23M→24M

23.0 - 24.0 mi

Top 81%
×6story building
+12ft-82ft

Overall

21530

Females

8862

F55-59

8862

24M→40K

24.0 - 24.9 mi

Top 80%
×1story
+6ft-20ft

Overall

21375

Females

8820

F55-59

8820

40K→25.2M

24.9 - 25.2 mi

Top 77%
×1story
+13ft-16ft

Overall

20632

Females

8393

F55-59

8393

25.2M→Finish

25.2 - 26.2 mi

Top 83%
×2story building
+22ft-21ft

Overall

22138

Females

9188

F55-59

9188

Passing Analysis

Category:
Athletes Passed
893
Passed By
2771
Net Change
-1878
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19279
5K → 10K204484-280#19279#19559
10K → 15K192194-2#19559#19561
15K → 20K122240-118#19561#19679
20K → Half1770-53#19679#19732
Half → 25K19699-680#19732#20412
25K → 30K54445-391#20412#20803
30K → 20M38176-138#20803#20941
20M → 21M38106-68#20941#21009
21M → 35K2198-77#21009#21086
35K → 23M5461-7#21086#21093
23M → 24M4456-12#21093#21105
24M → 40K3956-17#21105#21122
40K → 25.2M2416+8#21122#21114
25.2M → Finish2770-43#21114#21157
TOTALS8932771-1878
📊

Passing Visuals

Category:
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

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing