Boston Marathon logo
BOSTON MARATHON 2023

Cassandra Mcguire

Bib: 24556•F

OH

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F70-74)
#0 / 62
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
10:16/mi
31:53
↑ 97↓ 3451.5%
10K· 6.21 mi
10:19/mi
1:03:55
↑ 79↓ 1380.4%
15K· 9.32 mi
11:15/mi
1:38:52
↑ 67↓ 78
20K· 12.43 mi
10:51/mi
2:12:36
↑ 106↓ 860.1%
Half· 13.11 mi
10:38/mi
2:19:51
↑ 19↓ 370.5%
25K· 15.53 mi
10:57/mi
2:46:24
↑ 66↓ 880.2%
30K· 18.64 mi
11:32/mi
3:22:15
↑ 181↓ 1480.2%
20M
12:03/mi
3:38:37
↑ 64↓ 500.2%
21M
12:21/mi
3:50:58
↑ 106↓ 241.6%
35K· 21.75 mi
11:47/mi
3:59:47
↑ 17↓ 861.7%
23M
10:29/mi
4:12:54
↑ 23↓ 630.6%
24M
10:05/mi
4:22:59
↓ 821.3%
40K· 24.85 mi
10:35/mi
4:32:02
↓ 200.3%
25.2M
10:35/mi
4:35:41
↑ 13↓ 160.2%
Finish· 26.22 mi
9:30/mi
4:45:22
↑ 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
Time2:19:51
Pace10:40 /mi
2nd Half
Distance13.11 mi
Time2:25:31
Pace11:06 /mi
📊Positive Split: 4.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:48:2831:5310:1631:53
10:16
-
10K
6.21 mi12:20:301:03:5510:1732:02
10:19
+0:03
15K
9.32 mi12:55:271:38:5210:3634:57
11:15
+0:56
20K
12.43 mi13:29:112:12:3610:4033:44
10:51
-0:24
Half
13.11 mi13:36:262:19:5110:407:15
10:38
-0:13
25K
15.53 mi14:02:592:46:2410:4326:33
10:57
+0:19
30K
18.64 mi14:38:503:22:1510:5135:51
11:32
+0:35
20M
20.00 mi14:55:123:38:3710:5616:22
12:03
+0:31
21M
21.00 mi15:07:333:50:5811:0012:21
12:21
+0:18
35K
21.75 mi15:16:223:59:4711:028:49
11:47
-0:34
23M
23.00 mi15:29:294:12:5411:0013:07
10:29
-1:18
24M
24.00 mi15:39:344:22:5910:5710:05
10:05
-0:24
40K
24.85 mi15:48:374:32:0210:579:03
10:35
+0:30
25.2M
25.20 mi15:52:164:35:4110:563:39
10:35
0:00
Finish
26.22 mi16:01:574:45:2210:549:41
9:30
-1:05

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

9:30 /mi

Average Pace

10:54 /mi

Slowest Pace

12:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

19:46

7% of race

Time at Steady Pace

2:37:16

55% of race

Time at Slower Pace

1:48:20

38% of race

Average Pace: 10:53 /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 mi11:48:2831:5310:1631:53
10:16
#24126
10K
6.21 mi12:20:301:03:5510:1732:02
10:19
#24236
15K
9.32 mi12:55:271:38:5210:3634:57
11:15
#24830
20K
12.43 mi13:29:112:12:3610:4033:44
10:51
#24709
Half
13.11 mi13:36:262:19:5110:407:15
10:38
#24698
25K
15.53 mi14:02:592:46:2410:4326:33
10:57
#24579
30K
18.64 mi14:38:503:22:1510:5135:51
11:32
#24449
20M
20.00 mi14:55:123:38:3710:5616:22
12:03
#24425
21M
21.00 mi15:07:333:50:5811:0012:21
12:21
#24354
35K
21.75 mi15:16:223:59:4711:028:49
11:47
#24362
23M
23.00 mi15:29:294:12:5411:0013:07
10:29
#24224
24M
24.00 mi15:39:344:22:5910:5710:05
10:05
#24119
40K
24.85 mi15:48:374:32:0210:579:03
10:35
#24030
25.2M
25.20 mi15:52:164:35:4110:563:39
10:35
#23988
Finish
26.22 mi16:01:574:45:2210:549:41
9:30
#23893
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF70-74Seg. OverallSeg. FemalesSeg. F70-74
5K3.11 mi3.11 mi241269951995125474(Top 96%)10729(Top 94%)10729(Top 17305%)
10K6.21 mi3.10 mi24236-11010017-6610017-6624321(Top 91%)10070(Top 88%)10070(Top 16242%)
15K9.32 mi3.11 mi24830-59410352-33510352-33525474(Top 96%)10729(Top 94%)10729(Top 17305%)
20K12.43 mi3.11 mi24709+12110297+5510297+5524407(Top 92%)10154(Top 89%)10154(Top 16377%)
Half13.11 mi0.68 mi24698+1110287+1010287+1024426(Top 92%)10164(Top 89%)10164(Top 16394%)
25K15.53 mi2.42 mi24579+11910231+5610231+5623887(Top 90%)9898(Top 87%)9898(Top 15965%)
30K18.64 mi3.11 mi24449+13010175+5610175+5623916(Top 90%)9971(Top 87%)9971(Top 16082%)
20M20.00 mi1.36 mi24425+2410173+210173+224259(Top 91%)10218(Top 89%)10218(Top 16481%)
21M21.00 mi1.00 mi24354+7110137+3610137+3623273(Top 87%)9692(Top 85%)9692(Top 15632%)
35K21.75 mi0.75 mi24362-810151-1410151-1424462(Top 92%)10375(Top 91%)10375(Top 16734%)
23M23.00 mi1.25 mi24224+13810088+6310088+6321281(Top 80%)8675(Top 76%)8675(Top 13992%)
24M24.00 mi1.00 mi24119+10510035+5310035+5321049(Top 79%)8579(Top 75%)8579(Top 13837%)
40K24.85 mi0.85 mi24030+899990+459990+4521444(Top 81%)8873(Top 78%)8873(Top 14311%)
25.2M25.20 mi0.35 mi23988+429967+239967+2319433(Top 73%)7767(Top 68%)7767(Top 12527%)
Finish26.22 mi1.02 mi23893+959922+459922+4520171(Top 76%)8107(Top 71%)8107(Top 13076%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 96%
×21story building
+97ft-345ft

Overall

25474

Females

10729

F70-74

10729

5K→10K

3.1 - 6.2 mi

Top 91%
×5story building
+79ft-138ft

Overall

24321

Females

10070

F70-74

10070

10K→15K

6.2 - 9.3 mi

Top 96%
×3story building
+67ft-78ft

Overall

25474

Females

10729

F70-74

10729

15K→20K

9.3 - 12.4 mi

Top 92%
×5story building
+106ft-86ft

Overall

24407

Females

10154

F70-74

10154

20K→Half

12.4 - 13.1 mi

Top 92%
×2story building
+19ft-37ft

Overall

24426

Females

10164

F70-74

10164

Half→25K

13.1 - 15.5 mi

Top 90%
×4story building
+66ft-88ft

Overall

23887

Females

9898

F70-74

9898

25K→30K

15.5 - 18.6 mi

Top 90%
×9story building
+181ft-148ft

Overall

23916

Females

9971

F70-74

9971

30K→20M

18.6 - 20.0 mi

Top 91%
×5story building
+64ft-50ft

Overall

24259

Females

10218

F70-74

10218

20M→21M

20.0 - 21.0 mi

Top 87%
×8story building
+106ft-24ft

Overall

23273

Females

9692

F70-74

9692

21M→35K

21.0 - 21.8 mi

Top 92%
×7story building
+17ft-86ft

Overall

24462

Females

10375

F70-74

10375

35K→23M

21.8 - 23.0 mi

Top 80%
×5story building
+23ft-63ft

Overall

21281

Females

8675

F70-74

8675

23M→24M

23.0 - 24.0 mi

Top 79%
×6story building
+12ft-82ft

Overall

21049

Females

8579

F70-74

8579

24M→40K

24.0 - 24.9 mi

Top 81%
×1story
+6ft-20ft

Overall

21444

Females

8873

F70-74

8873

40K→25.2M

24.9 - 25.2 mi

Top 73%
×1story
+13ft-16ft

Overall

19433

Females

7767

F70-74

7767

25.2M→Finish

25.2 - 26.2 mi

Top 76%
×2story building
+22ft-21ft

Overall

20171

Females

8107

F70-74

8107

Passing Analysis

Category:
Athletes Passed
1312
Passed By
1079
Net Change
+233
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24126
5K → 10K153263-110#24126#24236
10K → 15K21615-594#24236#24830
15K → 20K16443+121#24830#24709
20K → Half2413+11#24709#24698
Half → 25K13718+119#24698#24579
25K → 30K17141+130#24579#24449
30K → 20M5834+24#24449#24425
20M → 21M8615+71#24425#24354
21M → 35K2735-8#24354#24362
35K → 23M1380+138#24362#24224
23M → 24M1061+105#24224#24119
24M → 40K890+89#24119#24030
40K → 25.2M420+42#24030#23988
25.2M → Finish961+95#23988#23893
TOTALS13121079+233
📊

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