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BOSTON MARATHON 2023

Kassandra Tat

Bib: 26236•F

MA

0:00
0:00
/ mi
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Division (F18-39)
#0 / 4884
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
10:53/mi
33:48
↑ 97↓ 3451.5%
10K· 6.21 mi
10:51/mi
1:07:31
↑ 79↓ 1380.4%
15K· 9.32 mi
11:03/mi
1:41:52
↑ 67↓ 78
20K· 12.43 mi
11:14/mi
2:16:47
↑ 106↓ 860.1%
Half· 13.11 mi
10:52/mi
2:24:12
↑ 19↓ 370.5%
25K· 15.53 mi
10:57/mi
2:50:44
↑ 66↓ 880.2%
30K· 18.64 mi
11:28/mi
3:26:23
↑ 181↓ 1480.2%
20M
11:24/mi
3:41:53
↑ 64↓ 500.2%
21M
12:27/mi
3:54:20
↑ 106↓ 241.6%
35K· 21.75 mi
11:07/mi
4:02:39
↑ 17↓ 861.7%
23M
10:58/mi
4:16:23
↑ 23↓ 630.6%
24M
11:32/mi
4:27:55
↓ 821.3%
40K· 24.85 mi
10:41/mi
4:37:03
↓ 200.3%
25.2M
12:25/mi
4:41:20
↑ 13↓ 160.2%
Finish· 26.22 mi
10:49/mi
4:52:21
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:24:12
Pace11:00 /mi
2nd Half
Distance13.11 mi
Time2:28:09
Pace11:18 /mi
📊Positive Split: 2.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:57:4033:4810:5333:48
10:53
-
10K
6.21 mi12:31:231:07:3110:5233:43
10:51
-0:02
15K
9.32 mi13:05:441:41:5210:5634:21
11:03
+0:12
20K
12.43 mi13:40:392:16:4711:0034:55
11:14
+0:11
Half
13.11 mi13:48:042:24:1211:007:25
10:52
-0:22
25K
15.53 mi14:14:362:50:4410:5926:32
10:57
+0:05
30K
18.64 mi14:50:153:26:2311:0435:39
11:28
+0:31
20M
20.00 mi15:05:453:41:5311:0615:30
11:24
-0:04
21M
21.00 mi15:18:123:54:2011:1012:27
12:27
+1:03
35K
21.75 mi15:26:314:02:3911:098:19
11:07
-1:20
23M
23.00 mi15:40:154:16:2311:0913:44
10:58
-0:09
24M
24.00 mi15:51:474:27:5511:1011:32
11:32
+0:34
40K
24.85 mi16:00:554:37:0311:099:08
10:41
-0:51
25.2M
25.20 mi16:05:124:41:2011:104:17
12:25
+1:44
Finish
26.22 mi16:16:134:52:2111:1011:01
10:49
-1:36

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

10:41 /mi

Average Pace

11:10 /mi

Slowest Pace

12:27 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

4:35:37

94% of race

Time at Steady Pace

16:44

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 11:09 /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 mi11:57:4033:4810:5333:48
10:53
#25503
10K
6.21 mi12:31:231:07:3110:5233:43
10:51
#25388
15K
9.32 mi13:05:441:41:5210:5634:21
11:03
#25349
20K
12.43 mi13:40:392:16:4711:0034:55
11:14
#25231
Half
13.11 mi13:48:042:24:1211:007:25
10:52
#25198
25K
15.53 mi14:14:362:50:4410:5926:32
10:57
#25004
30K
18.64 mi14:50:153:26:2311:0435:39
11:28
#24786
20M
20.00 mi15:05:453:41:5311:0615:30
11:24
#24678
21M
21.00 mi15:18:123:54:2011:1012:27
12:27
#24629
35K
21.75 mi15:26:314:02:3911:098:19
11:07
#24591
23M
23.00 mi15:40:154:16:2311:0913:44
10:58
#24462
24M
24.00 mi15:51:474:27:5511:1011:32
11:32
#24450
40K
24.85 mi16:00:554:37:0311:099:08
10:41
#24365
25.2M
25.20 mi16:05:124:41:2011:104:17
12:25
#24349
Finish
26.22 mi16:16:134:52:2111:1011:01
10:49
#24338
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi25503107241072425276(Top 95%)10617(Top 93%)10617(Top 217%)
10K6.21 mi3.10 mi25388+11510658+6610658+6625271(Top 95%)10591(Top 93%)10591(Top 217%)
15K9.32 mi3.11 mi25349+3910644+1410644+1425276(Top 95%)10617(Top 93%)10617(Top 217%)
20K12.43 mi3.11 mi25231+11810586+5810586+5824936(Top 94%)10444(Top 91%)10444(Top 214%)
Half13.11 mi0.68 mi25198+3310569+1710569+1724769(Top 93%)10357(Top 91%)10357(Top 212%)
25K15.53 mi2.42 mi25004+19410468+10110468+10123877(Top 90%)9894(Top 87%)9894(Top 203%)
30K18.64 mi3.11 mi24786+21810369+9910369+9923833(Top 90%)9922(Top 87%)9922(Top 203%)
20M20.00 mi1.36 mi24678+10810312+5710312+5723376(Top 88%)9722(Top 85%)9722(Top 199%)
21M21.00 mi1.00 mi24629+4910289+2310289+2323402(Top 88%)9763(Top 85%)9763(Top 200%)
35K21.75 mi0.75 mi24591+3810275+1410275+1423524(Top 88%)9889(Top 87%)9889(Top 202%)
23M23.00 mi1.25 mi24462+12910214+6110214+6122296(Top 84%)9217(Top 81%)9217(Top 189%)
24M24.00 mi1.00 mi24450+1210217-310217-323925(Top 90%)10126(Top 89%)10126(Top 207%)
40K24.85 mi0.85 mi24365+8510177+4010177+4021688(Top 81%)8987(Top 79%)8987(Top 184%)
25.2M25.20 mi0.35 mi24349+1610171+610171+623191(Top 87%)9768(Top 86%)9768(Top 200%)
Finish26.22 mi1.02 mi24338+1110170+110170+123637(Top 89%)9975(Top 87%)9975(Top 204%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 95%
×21story building
+97ft-345ft

Overall

25276

Females

10617

F18-39

10617

5K→10K

3.1 - 6.2 mi

Top 95%
×5story building
+79ft-138ft

Overall

25271

Females

10591

F18-39

10591

10K→15K

6.2 - 9.3 mi

Top 95%
×3story building
+67ft-78ft

Overall

25276

Females

10617

F18-39

10617

15K→20K

9.3 - 12.4 mi

Top 94%
×5story building
+106ft-86ft

Overall

24936

Females

10444

F18-39

10444

20K→Half

12.4 - 13.1 mi

Top 93%
×2story building
+19ft-37ft

Overall

24769

Females

10357

F18-39

10357

Half→25K

13.1 - 15.5 mi

Top 90%
×4story building
+66ft-88ft

Overall

23877

Females

9894

F18-39

9894

25K→30K

15.5 - 18.6 mi

Top 90%
×9story building
+181ft-148ft

Overall

23833

Females

9922

F18-39

9922

30K→20M

18.6 - 20.0 mi

Top 88%
×5story building
+64ft-50ft

Overall

23376

Females

9722

F18-39

9722

20M→21M

20.0 - 21.0 mi

Top 88%
×8story building
+106ft-24ft

Overall

23402

Females

9763

F18-39

9763

21M→35K

21.0 - 21.8 mi

Top 88%
×7story building
+17ft-86ft

Overall

23524

Females

9889

F18-39

9889

35K→23M

21.8 - 23.0 mi

Top 84%
×5story building
+23ft-63ft

Overall

22296

Females

9217

F18-39

9217

23M→24M

23.0 - 24.0 mi

Top 90%
×6story building
+12ft-82ft

Overall

23925

Females

10126

F18-39

10126

24M→40K

24.0 - 24.9 mi

Top 81%
×1story
+6ft-20ft

Overall

21688

Females

8987

F18-39

8987

40K→25.2M

24.9 - 25.2 mi

Top 87%
×1story
+13ft-16ft

Overall

23191

Females

9768

F18-39

9768

25.2M→Finish

25.2 - 26.2 mi

Top 89%
×2story building
+22ft-21ft

Overall

23637

Females

9975

F18-39

9975

Passing Analysis

Category:
Athletes Passed
1496
Passed By
331
Net Change
+1165
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25503
5K → 10K224109+115#25503#25388
10K → 15K11879+39#25388#25349
15K → 20K15133+118#25349#25231
20K → Half4512+33#25231#25198
Half → 25K2006+194#25198#25004
25K → 30K23315+218#25004#24786
30K → 20M1146+108#24786#24678
20M → 21M578+49#24678#24629
21M → 35K468+38#24629#24591
35K → 23M1301+129#24591#24462
23M → 24M3624+12#24462#24450
24M → 40K861+85#24450#24365
40K → 25.2M248+16#24365#24349
25.2M → Finish3221+11#24349#24338
TOTALS1496331+1165
📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing