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BOSTON MARATHON 2024

Colleen Cassidy

Bib: 24453•F

CT

0:00
0:00
/ mi
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Overall
#0 / 25550
Gender (Female)
#0 / 10924
Division (F18-39)
#0 / 4660
Race Day Weather
55°/45°F
scattered clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:46
Rank: #11942
Start → 5K
7:39/mi
23:46 split
10K· 6.21 mi
47:46
Rank: #11992 (-50)
5K → 10K
7:43/mi
24:00 split
15K· 9.32 mi
1:12:09
Rank: #12068 (-76)
10K → 15K
7:51/mi
24:23 split
20K· 12.43 mi
1:38:14
Rank: #12683 (-615)
15K → 20K
8:24/mi
26:05 split
Half· 13.11 mi
1:44:01
Rank: #12859 (-176)
20K → Half
8:29/mi
5:47 split
25K· 15.53 mi
2:10:15
Rank: #15118 (-2259)
Half → 25K
10:49/mi
26:14 split
30K· 18.64 mi
2:49:18
Rank: #17747 (-2629)
25K → 30K
12:34/mi
39:03 split
20M
3:09:29
Rank: #18924 (-1177)
30K → 20M
14:51/mi
20:11 split
21M
3:27:40
Rank: #19789 (-865)
20M → 21M
18:11/mi
18:11 split
35K· 21.75 mi
3:34:35
Rank: #19597 (+192)
21M → 35K
9:15/mi
6:55 split
23M
3:49:42
Rank: #19692 (-95)
35K → 23M
12:04/mi
15:07 split
24M
4:05:01
Rank: #20159 (-467)
23M → 24M
15:19/mi
15:19 split
40K· 24.85 mi
4:21:29
Rank: #20811 (-652)
24M → 40K
19:16/mi
16:28 split
25.2M
4:26:46
Rank: #20859 (-48)
40K → 25.2M
15:19/mi
5:17 split
Finish· 26.22 mi
4:38:32
Rank: #20902 (-43)
25.2M → Finish
11:33/mi
11:46 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:44:01
Pace7:56 /mi
2nd Half
Distance13.11 mi
Time2:54:31
Pace13:19 /mi
📊Positive Split: 67.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:38:5323:467:3923:46
7:39
-
10K
6.21 mi12:02:5347:467:4124:00
7:43
+0:04
15K
9.32 mi12:27:161:12:097:4424:23
7:51
+0:08
20K
12.43 mi12:53:211:38:147:5426:05
8:24
+0:33
Half
13.11 mi12:59:081:44:017:565:47
8:29
+0:05
25K
15.53 mi13:25:222:10:158:2326:14
10:49
+2:20
30K
18.64 mi14:04:252:49:189:0539:03
12:34
+1:45
20M
20.00 mi14:24:363:09:299:2820:11
14:51
+2:17
21M
21.00 mi14:42:473:27:409:5318:11
18:11
+3:20
35K
21.75 mi14:49:423:34:359:526:55
9:15
-8:56
23M
23.00 mi15:04:493:49:429:5915:07
12:04
+2:49
24M
24.00 mi15:20:084:05:0110:1315:19
15:19
+3:15
40K
24.85 mi15:36:364:21:2910:3116:28
19:16
+3:57
25.2M
25.20 mi15:41:534:26:4610:355:17
15:19
-3:57
Finish
26.22 mi15:53:394:38:3210:3811:46
11:33
-3:46

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

7:39 /mi

Average Pace

10:38 /mi

Slowest Pace

19:16 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:50:56

40% of race

Time at Steady Pace

1:32:10

33% of race

Time at Slower Pace

1:15:26

27% of race

Average Pace: 10:37 /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 mi11:38:5323:467:3923:46
7:39
#11942
10K
6.21 mi12:02:5347:467:4124:00
7:43
#11992
15K
9.32 mi12:27:161:12:097:4424:23
7:51
#12068
20K
12.43 mi12:53:211:38:147:5426:05
8:24
#12683
Half
13.11 mi12:59:081:44:017:565:47
8:29
#12859
25K
15.53 mi13:25:222:10:158:2326:14
10:49
#15118
30K
18.64 mi14:04:252:49:189:0539:03
12:34
#17747
20M
20.00 mi14:24:363:09:299:2820:11
14:51
#18924
21M
21.00 mi14:42:473:27:409:5318:11
18:11
#19789
35K
21.75 mi14:49:423:34:359:526:55
9:15
#19597
23M
23.00 mi15:04:493:49:429:5915:07
12:04
#19692
24M
24.00 mi15:20:084:05:0110:1315:19
15:19
#20159
40K
24.85 mi15:36:364:21:2910:3116:28
19:16
#20811
25.2M
25.20 mi15:41:534:26:4610:355:17
15:19
#20859
Finish
26.22 mi15:53:394:38:3210:3811:46
11:33
#20902
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi119423100310012341(Top 48%)3435(Top 31%)3435(Top 74%)
10K6.21 mi3.10 mi11992-503169-693169-6912079(Top 47%)3238(Top 30%)3238(Top 69%)
15K9.32 mi3.11 mi12068-763243-743243-7412341(Top 48%)3435(Top 31%)3435(Top 74%)
20K12.43 mi3.11 mi12683-6153595-3523595-35214236(Top 56%)4570(Top 42%)4570(Top 98%)
Half13.11 mi0.68 mi12859-1763702-1073702-10715657(Top 61%)5457(Top 50%)5457(Top 117%)
25K15.53 mi2.42 mi15118-22595072-13705072-137021133(Top 83%)8548(Top 78%)8548(Top 183%)
30K18.64 mi3.11 mi17747-26296690-16186690-161822764(Top 89%)9529(Top 87%)9529(Top 204%)
20M20.00 mi1.36 mi18924-11777360-6707360-67024659(Top 97%)10547(Top 97%)10547(Top 226%)
21M21.00 mi1.00 mi19789-8657837-4777837-47725304(Top 99%)10841(Top 99%)10841(Top 233%)
35K21.75 mi0.75 mi19597+1927763+747763+7414524(Top 57%)5613(Top 51%)5613(Top 120%)
23M23.00 mi1.25 mi19692-957835-727835-7220888(Top 82%)8829(Top 81%)8829(Top 189%)
24M24.00 mi1.00 mi20159-4678095-2608095-26024925(Top 98%)10731(Top 98%)10731(Top 230%)
40K24.85 mi0.85 mi20811-6528471-3768471-37625448(Top 100%)10895(Top 100%)10895(Top 234%)
25.2M25.20 mi0.35 mi20859-488494-238494-2323374(Top 91%)10079(Top 92%)10079(Top 216%)
Finish26.22 mi1.02 mi20902-438526-328526-3222517(Top 88%)9701(Top 89%)9701(Top 208%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 48%
×21story building
+97ft-345ft

Overall

12341

Females

3435

F18-39

3435

5K→10K

3.1 - 6.2 mi

Top 47%
×5story building
+79ft-138ft

Overall

12079

Females

3238

F18-39

3238

10K→15K

6.2 - 9.3 mi

Top 48%
×3story building
+67ft-78ft

Overall

12341

Females

3435

F18-39

3435

15K→20K

9.3 - 12.4 mi

Top 56%
×5story building
+106ft-86ft

Overall

14236

Females

4570

F18-39

4570

20K→Half

12.4 - 13.1 mi

Top 61%
×2story building
+19ft-37ft

Overall

15657

Females

5457

F18-39

5457

Half→25K

13.1 - 15.5 mi

Top 83%
×4story building
+66ft-88ft

Overall

21133

Females

8548

F18-39

8548

25K→30K

15.5 - 18.6 mi

Top 89%
×9story building
+181ft-148ft

Overall

22764

Females

9529

F18-39

9529

30K→20M

18.6 - 20.0 mi

Top 97%
×5story building
+64ft-50ft

Overall

24659

Females

10547

F18-39

10547

20M→21M

20.0 - 21.0 mi

Top 99%
×8story building
+106ft-24ft

Overall

25304

Females

10841

F18-39

10841

21M→35K

21.0 - 21.8 mi

Top 57%
×7story building
+17ft-86ft

Overall

14524

Females

5613

F18-39

5613

35K→23M

21.8 - 23.0 mi

Top 82%
×5story building
+23ft-63ft

Overall

20888

Females

8829

F18-39

8829

23M→24M

23.0 - 24.0 mi

Top 98%
×6story building
+12ft-82ft

Overall

24925

Females

10731

F18-39

10731

24M→40K

24.0 - 24.9 mi

Top 100%
×1story
+6ft-20ft

Overall

25448

Females

10895

F18-39

10895

40K→25.2M

24.9 - 25.2 mi

Top 91%
×1story
+13ft-16ft

Overall

23374

Females

10079

F18-39

10079

25.2M→Finish

25.2 - 26.2 mi

Top 88%
×2story building
+22ft-21ft

Overall

22517

Females

9701

F18-39

9701

Passing Analysis

Category:
Athletes Passed
962
Passed By
9922
Net Change
-8960
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11942
5K → 10K266316-50#11942#11992
10K → 15K209285-76#11992#12068
15K → 20K98713-615#12068#12683
20K → Half16192-176#12683#12859
Half → 25K222281-2259#12859#15118
25K → 30K132642-2629#15118#17747
30K → 20M61183-1177#17747#18924
20M → 21M4869-865#18924#19789
21M → 35K1931+192#19789#19597
35K → 23M68163-95#19597#19692
23M → 24M10477-467#19692#20159
24M → 40K1653-652#20159#20811
40K → 25.2M1361-48#20811#20859
25.2M → Finish4386-43#20859#20902
TOTALS9629922-8960
📊

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