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BOSTON MARATHON 2025

Cassie Johnston

Bib: 17419•F

WI

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
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
27:42
Rank: #22076
Start → 5K
27:42 | 8:55/mi
10K· 6.21 mi
55:56
Rank: #22442 (-366)
5K → 10K
28:14 | 9:05/mi
15K· 9.32 mi
1:24:23
Rank: #22514 (-72)
10K → 15K
28:27 | 9:09/mi
20K· 12.43 mi
1:54:00
Rank: #22674 (-160)
15K → 20K
29:37 | 9:32/mi
Half· 13.11 mi
2:00:27
Rank: #22731 (-57)
20K → Half
6:27 | 9:27/mi
25K· 15.53 mi
2:27:17
Rank: #23359 (-628)
Half → 25K
26:50 | 11:04/mi
30K· 18.64 mi
2:59:37
Rank: #23200 (+159)
25K → 30K
32:20 | 10:24/mi
20M
3:13:01
Rank: #22994 (+206)
30K → 20M
13:24 | 9:52/mi
21M
3:24:01
Rank: #22910 (+84)
20M → 21M
11:00 | 11:00/mi
35K· 21.75 mi
3:31:06
Rank: #22816 (+94)
21M → 35K
7:05 | 9:28/mi
23M
3:43:18
Rank: #22626 (+190)
35K → 23M
12:12 | 9:45/mi
24M
3:54:37
Rank: #22714 (-88)
23M → 24M
11:19 | 11:19/mi
40K· 24.85 mi
4:03:55
Rank: #22709 (+5)
24M → 40K
9:18 | 10:53/mi
25.2M
4:07:50
Rank: #22701 (+8)
40K → 25.2M
3:55 | 11:21/mi
Finish· 26.22 mi
4:18:40
Rank: #22788 (-87)
25.2M → Finish
10:50 | 10:38/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:00:27
Pace9:11 /mi
2nd Half
Distance13.11 mi
Time2:18:13
Pace10:33 /mi
📊Positive Split: 14.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:28:5527:428:5527:42
8:55
-
10K
6.21 mi11:57:0955:569:0028:14
9:05
+0:10
15K
9.32 mi12:25:361:24:239:0328:27
9:09
+0:04
20K
12.43 mi12:55:131:54:009:1029:37
9:32
+0:23
Half
13.11 mi13:01:402:00:279:116:27
9:27
-0:05
25K
15.53 mi13:28:302:27:179:2926:50
11:04
+1:37
30K
18.64 mi14:00:502:59:379:3832:20
10:24
-0:40
20M
20.00 mi14:14:143:13:019:3913:24
9:52
-0:32
21M
21.00 mi14:25:143:24:019:4311:00
11:00
+1:08
35K
21.75 mi14:32:193:31:069:427:05
9:28
-1:32
23M
23.00 mi14:44:313:43:189:4312:12
9:45
+0:17
24M
24.00 mi14:55:503:54:379:4711:19
11:19
+1:34
40K
24.85 mi15:05:084:03:559:499:18
10:53
-0:26
25.2M
25.20 mi15:09:034:07:509:503:55
11:21
+0:28
Finish
26.22 mi15:19:534:18:409:5210:50
10:38
-0:43

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

8:55 /mi

Average Pace

9:52 /mi

Slowest Pace

11:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:24:23

33% of race

Time at Steady Pace

1:08:45

27% of race

Time at Slower Pace

1:45:32

41% of race

Average Pace: 9:52 /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 mi11:28:5527:428:5527:42
8:55
#22076
10K
6.21 mi11:57:0955:569:0028:14
9:05
#22442
15K
9.32 mi12:25:361:24:239:0328:27
9:09
#22514
20K
12.43 mi12:55:131:54:009:1029:37
9:32
#22674
Half
13.11 mi13:01:402:00:279:116:27
9:27
#22731
25K
15.53 mi13:28:302:27:179:2926:50
11:04
#23359
30K
18.64 mi14:00:502:59:379:3832:20
10:24
#23200
20M
20.00 mi14:14:143:13:019:3913:24
9:52
#22994
21M
21.00 mi14:25:143:24:019:4311:00
11:00
#22910
35K
21.75 mi14:32:193:31:069:427:05
9:28
#22816
23M
23.00 mi14:44:313:43:189:4312:12
9:45
#22626
24M
24.00 mi14:55:503:54:379:4711:19
11:19
#22714
40K
24.85 mi15:05:084:03:559:499:18
10:53
#22709
25.2M
25.20 mi15:09:034:07:509:503:55
11:21
#22701
Finish
26.22 mi15:19:534:18:409:5210:50
10:38
#22788
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi220768673867322710(Top 80%)8950(Top 73%)8950(Top 164%)
10K6.21 mi3.10 mi22442-3668862-1898862-18922776(Top 80%)9011(Top 74%)9011(Top 165%)
15K9.32 mi3.11 mi22514-728865-38865-322710(Top 80%)8950(Top 73%)8950(Top 164%)
20K12.43 mi3.11 mi22674-1608942-778942-7723013(Top 81%)9157(Top 75%)9157(Top 167%)
Half13.11 mi0.68 mi22731-578973-318973-3123448(Top 83%)9400(Top 77%)9400(Top 172%)
25K15.53 mi2.42 mi23359-6289333-3609333-36025307(Top 89%)10468(Top 86%)10468(Top 191%)
30K18.64 mi3.11 mi23200+1599296+379296+3722732(Top 80%)9173(Top 75%)9173(Top 168%)
20M20.00 mi1.36 mi22994+2069209+879209+8720514(Top 72%)8091(Top 66%)8091(Top 148%)
21M21.00 mi1.00 mi22910+849180+299180+2921416(Top 75%)8666(Top 71%)8666(Top 158%)
35K21.75 mi0.75 mi22816+949143+379143+3720268(Top 71%)8126(Top 66%)8126(Top 149%)
23M23.00 mi1.25 mi22626+1909059+849059+8419627(Top 69%)7855(Top 64%)7855(Top 144%)
24M24.00 mi1.00 mi22714-889128-699128-6924609(Top 87%)10436(Top 85%)10436(Top 191%)
40K24.85 mi0.85 mi22709+59143-159143-1522863(Top 80%)9630(Top 79%)9630(Top 176%)
25.2M25.20 mi0.35 mi22701+89146-39146-321706(Top 76%)9012(Top 74%)9012(Top 165%)
Finish26.22 mi1.02 mi22788-879214-689214-6824584(Top 87%)10446(Top 85%)10446(Top 191%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 80%
×21stories
+97ft-345ft

Overall

22710

Females

8950

F18-39

8950

5K→10K

3.1 - 6.2 mi

Top 80%
×5stories
+79ft-138ft

Overall

22776

Females

9011

F18-39

9011

10K→15K

6.2 - 9.3 mi

Top 80%
×3stories
+67ft-78ft

Overall

22710

Females

8950

F18-39

8950

15K→20K

9.3 - 12.4 mi

Top 81%
×5stories
+106ft-86ft

Overall

23013

Females

9157

F18-39

9157

20K→Half

12.4 - 13.1 mi

Top 83%
×2stories
+19ft-37ft

Overall

23448

Females

9400

F18-39

9400

Half→25K

13.1 - 15.5 mi

Top 89%
×4stories
+66ft-88ft

Overall

25307

Females

10468

F18-39

10468

25K→30K

15.5 - 18.6 mi

Top 80%
×9stories
+181ft-148ft

Overall

22732

Females

9173

F18-39

9173

30K→20M

18.6 - 20.0 mi

Top 72%
×5stories
+64ft-50ft

Overall

20514

Females

8091

F18-39

8091

20M→21M

20.0 - 21.0 mi

Top 75%
×8stories
+106ft-24ft

Overall

21416

Females

8666

F18-39

8666

21M→35K

21.0 - 21.8 mi

Top 71%
×7stories
+17ft-86ft

Overall

20268

Females

8126

F18-39

8126

35K→23M

21.8 - 23.0 mi

Top 69%
×5stories
+23ft-63ft

Overall

19627

Females

7855

F18-39

7855

23M→24M

23.0 - 24.0 mi

Top 87%
×6stories
+12ft-82ft

Overall

24609

Females

10436

F18-39

10436

24M→40K

24.0 - 24.9 mi

Top 80%
×1story
+6ft-20ft

Overall

22863

Females

9630

F18-39

9630

40K→25.2M

24.9 - 25.2 mi

Top 76%
×1story
+13ft-16ft

Overall

21706

Females

9012

F18-39

9012

25.2M→Finish

25.2 - 26.2 mi

Top 87%
×2stories
+22ft-21ft

Overall

24584

Females

10446

F18-39

10446

Passing Analysis

Category:
Athletes Passed
1421
Passed By
2133
Net Change
-712
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22076
5K → 10K122488-366#22076#22442
10K → 15K149221-72#22442#22514
15K → 20K124284-160#22514#22674
20K → Half1673-57#22674#22731
Half → 25K25653-628#22731#23359
25K → 30K24990+159#23359#23200
30K → 20M2093+206#23200#22994
20M → 21M11127+84#22994#22910
21M → 35K1006+94#22910#22816
35K → 23M1944+190#22816#22626
23M → 24M30118-88#22626#22714
24M → 40K5247+5#22714#22709
40K → 25.2M2012+8#22709#22701
25.2M → Finish20107-87#22701#22788
TOTALS14212133-712
📊

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