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BOSTON MARATHON 2025

Cassandra Zehenny

Bib: 13235•F

MO

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 49%
Gender (Female)
#0 / 12228
Top 35%
Division (F18-39)
#0 / 5469
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:24
Rank: #15300
Start → 5K
24:24 | 7:51/mi
10K· 6.21 mi
48:52
Rank: #15374 (-74)
5K → 10K
24:28 | 7:53/mi
15K· 9.32 mi
1:13:12
Rank: #15123 (+251)
10K → 15K
24:20 | 7:50/mi
20K· 12.43 mi
1:37:38
Rank: #14720 (+403)
15K → 20K
24:26 | 7:52/mi
Half· 13.11 mi
1:43:00
Rank: #14730 (-10)
20K → Half
5:22 | 7:52/mi
25K· 15.53 mi
2:02:15
Rank: #14461 (+269)
Half → 25K
19:15 | 7:56/mi
30K· 18.64 mi
2:28:14
Rank: #14305 (+156)
25K → 30K
25:59 | 8:22/mi
20M
2:40:03
Rank: #14346 (-41)
30K → 20M
11:49 | 8:42/mi
21M
2:49:00
Rank: #14258 (+88)
20M → 21M
8:57 | 8:57/mi
35K· 21.75 mi
2:55:21
Rank: #14307 (-49)
21M → 35K
6:21 | 8:29/mi
23M
3:06:14
Rank: #14323 (-16)
35K → 23M
10:53 | 8:42/mi
24M
3:14:39
Rank: #14274 (+49)
23M → 24M
8:25 | 8:25/mi
40K· 24.85 mi
3:21:46
Rank: #14180 (+94)
24M → 40K
7:07 | 8:19/mi
25.2M
3:24:49
Rank: #14108 (+72)
40K → 25.2M
3:03 | 8:51/mi
Finish· 26.22 mi
3:32:32
Rank: #13901 (+207)
25.2M → Finish
7:43 | 7:34/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:43:00
Pace7:51 /mi
2nd Half
Distance13.11 mi
Time1:49:32
Pace8:21 /mi
📊Positive Split: 6.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:54:5624:247:5124:24
7:51
-
10K
6.21 mi11:19:2448:527:5224:28
7:53
+0:02
15K
9.32 mi11:43:441:13:127:5124:20
7:50
-0:03
20K
12.43 mi12:08:101:37:387:5124:26
7:52
+0:02
Half
13.11 mi12:13:321:43:007:515:22
7:52
0:00
25K
15.53 mi12:32:472:02:157:5219:15
7:56
+0:04
30K
18.64 mi12:58:462:28:147:5725:59
8:22
+0:26
20M
20.00 mi13:10:352:40:038:0011:49
8:42
+0:20
21M
21.00 mi13:19:322:49:008:038:57
8:57
+0:15
35K
21.75 mi13:25:532:55:218:046:21
8:29
-0:28
23M
23.00 mi13:36:463:06:148:0610:53
8:42
+0:13
24M
24.00 mi13:45:113:14:398:078:25
8:25
-0:17
40K
24.85 mi13:52:183:21:468:077:07
8:19
-0:06
25.2M
25.20 mi13:55:213:24:498:083:03
8:51
+0:32
Finish
26.22 mi14:03:043:32:328:077:43
7:34
-1:17

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

7:34 /mi

Average Pace

8:07 /mi

Slowest Pace

8:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:17:05

64% of race

Time at Steady Pace

1:06:30

31% of race

Time at Slower Pace

8:57

4% of race

Average Pace: 8:06 /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 mi10:54:5624:247:5124:24
7:51
#15300
10K
6.21 mi11:19:2448:527:5224:28
7:53
#15374
15K
9.32 mi11:43:441:13:127:5124:20
7:50
#15123
20K
12.43 mi12:08:101:37:387:5124:26
7:52
#14720
Half
13.11 mi12:13:321:43:007:515:22
7:52
#14730
25K
15.53 mi12:32:472:02:157:5219:15
7:56
#14461
30K
18.64 mi12:58:462:28:147:5725:59
8:22
#14305
20M
20.00 mi13:10:352:40:038:0011:49
8:42
#14346
21M
21.00 mi13:19:322:49:008:038:57
8:57
#14258
35K
21.75 mi13:25:532:55:218:046:21
8:29
#14307
23M
23.00 mi13:36:463:06:148:0610:53
8:42
#14323
24M
24.00 mi13:45:113:14:398:078:25
8:25
#14274
40K
24.85 mi13:52:183:21:468:077:07
8:19
#14180
25.2M
25.20 mi13:55:213:24:498:083:03
8:51
#14108
Finish
26.22 mi14:03:043:32:328:077:43
7:34
#13901
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi153004715471514663(Top 52%)4394(Top 36%)4394(Top 80%)
10K6.21 mi3.10 mi15374-744763-484763-4815492(Top 55%)4830(Top 39%)4830(Top 88%)
15K9.32 mi3.11 mi15123+2514631+1324631+13214663(Top 52%)4394(Top 36%)4394(Top 80%)
20K12.43 mi3.11 mi14720+4034420+2114420+21113810(Top 49%)3991(Top 33%)3991(Top 73%)
Half13.11 mi0.68 mi14730-104427-74427-714847(Top 52%)4525(Top 37%)4525(Top 83%)
25K15.53 mi2.42 mi14461+2694312+1154312+11513447(Top 47%)3914(Top 32%)3914(Top 72%)
30K18.64 mi3.11 mi14305+1564284+284284+2813923(Top 49%)4321(Top 35%)4321(Top 79%)
20M20.00 mi1.36 mi14346-414326-424326-4215045(Top 53%)5066(Top 41%)5066(Top 93%)
21M21.00 mi1.00 mi14258+884302+244302+2413237(Top 47%)4236(Top 35%)4236(Top 77%)
35K21.75 mi0.75 mi14307-494344-424344-4215399(Top 54%)5455(Top 45%)5455(Top 100%)
23M23.00 mi1.25 mi14323-164390-464390-4614515(Top 51%)5073(Top 41%)5073(Top 93%)
24M24.00 mi1.00 mi14274+494397-74397-714006(Top 49%)4825(Top 39%)4825(Top 88%)
40K24.85 mi0.85 mi14180+944379+184379+1812332(Top 43%)4101(Top 34%)4101(Top 75%)
25.2M25.20 mi0.35 mi14108+724351+284351+2811018(Top 39%)3512(Top 29%)3512(Top 64%)
Finish26.22 mi1.02 mi13901+2074269+824269+829783(Top 34%)2901(Top 24%)2901(Top 53%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 52%
×21stories
+97ft-345ft

Overall

14663

Females

4394

F18-39

4394

5K→10K

3.1 - 6.2 mi

Top 55%
×5stories
+79ft-138ft

Overall

15492

Females

4830

F18-39

4830

10K→15K

6.2 - 9.3 mi

Top 52%
×3stories
+67ft-78ft

Overall

14663

Females

4394

F18-39

4394

15K→20K

9.3 - 12.4 mi

Top 49%
×5stories
+106ft-86ft

Overall

13810

Females

3991

F18-39

3991

20K→Half

12.4 - 13.1 mi

Top 52%
×2stories
+19ft-37ft

Overall

14847

Females

4525

F18-39

4525

Half→25K

13.1 - 15.5 mi

Top 47%
×4stories
+66ft-88ft

Overall

13447

Females

3914

F18-39

3914

25K→30K

15.5 - 18.6 mi

Top 49%
×9stories
+181ft-148ft

Overall

13923

Females

4321

F18-39

4321

30K→20M

18.6 - 20.0 mi

Top 53%
×5stories
+64ft-50ft

Overall

15045

Females

5066

F18-39

5066

20M→21M

20.0 - 21.0 mi

Top 47%
×8stories
+106ft-24ft

Overall

13237

Females

4236

F18-39

4236

21M→35K

21.0 - 21.8 mi

Top 54%
×7stories
+17ft-86ft

Overall

15399

Females

5455

F18-39

5455

35K→23M

21.8 - 23.0 mi

Top 51%
×5stories
+23ft-63ft

Overall

14515

Females

5073

F18-39

5073

23M→24M

23.0 - 24.0 mi

Top 49%
×6stories
+12ft-82ft

Overall

14006

Females

4825

F18-39

4825

24M→40K

24.0 - 24.9 mi

Top 43%
×1story
+6ft-20ft

Overall

12332

Females

4101

F18-39

4101

40K→25.2M

24.9 - 25.2 mi

Top 39%
×1story
+13ft-16ft

Overall

11018

Females

3512

F18-39

3512

25.2M→Finish

25.2 - 26.2 mi

Top 34%
×2stories
+22ft-21ft

Overall

9783

Females

2901

F18-39

2901

Passing Analysis

Category:
Athletes Passed
2627
Passed By
1228
Net Change
+1399
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15300
5K → 10K263337-74#15300#15374
10K → 15K34291+251#15374#15123
15K → 20K43431+403#15123#14720
20K → Half2535-10#14720#14730
Half → 25K31445+269#14730#14461
25K → 30K332176+156#14461#14305
30K → 20M100141-41#14305#14346
20M → 21M15668+88#14346#14258
21M → 35K4695-49#14258#14307
35K → 23M113129-16#14307#14323
23M → 24M9243+49#14323#14274
24M → 40K12026+94#14274#14180
40K → 25.2M753+72#14180#14108
25.2M → Finish2158+207#14108#13901
TOTALS26271228+1399
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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