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BOSTON MARATHON 2025

Cassie Ideran

Bib: 17961•F

IL

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 44%
Division (F18-39)
#0 / 5469
Race Day Weather
50°/40°F
broken clouds

⏱️ 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
8:26/mi
26:11
↑ 97↓ 3451.5%
10K· 6.21 mi
8:38/mi
53:01
↑ 79↓ 1380.4%
15K· 9.32 mi
8:34/mi
1:19:39
↑ 67↓ 78
20K· 12.43 mi
8:43/mi
1:46:45
↑ 106↓ 860.1%
Half· 13.11 mi
8:29/mi
1:52:32
↑ 19↓ 370.5%
25K· 15.53 mi
8:33/mi
2:13:15
↑ 66↓ 880.2%
30K· 18.64 mi
8:39/mi
2:40:08
↑ 181↓ 1480.2%
20M
8:15/mi
2:51:20
↑ 64↓ 500.2%
21M
8:25/mi
2:59:45
↑ 106↓ 241.6%
35K· 21.75 mi
7:41/mi
3:05:30
↑ 17↓ 861.7%
23M
8:03/mi
3:15:35
↑ 23↓ 630.6%
24M
7:57/mi
3:23:32
↓ 821.3%
40K· 24.85 mi
7:48/mi
3:30:12
↓ 200.3%
25.2M
8:01/mi
3:32:58
↑ 13↓ 160.2%
Finish· 26.22 mi
7:02/mi
3:40:08
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:52:32
Pace8:35 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:47:36
Pace8:12 /mi
📊Negative Split: 4.4% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:1526:118:2626:11
8:26
-
10K
6.21 mi11:43:0553:018:3226:50
8:38
+0:12
15K
9.32 mi12:09:431:19:398:3326:38
8:34
-0:04
20K
12.43 mi12:36:491:46:458:3527:06
8:43
+0:09
Half
13.11 mi12:42:361:52:328:355:47
8:29
-0:14
25K
15.53 mi13:03:192:13:158:3520:43
8:33
+0:04
30K
18.64 mi13:30:122:40:088:3526:53
8:39
+0:06
20M
20.00 mi13:41:242:51:208:3411:12
8:15
-0:24
21M
21.00 mi13:49:492:59:458:348:25
8:25
+0:10
35K
21.75 mi13:55:343:05:308:325:45
7:41
-0:44
23M
23.00 mi14:05:393:15:358:3010:05
8:03
+0:22
24M
24.00 mi14:13:363:23:328:297:57
7:57
-0:06
40K
24.85 mi14:20:163:30:128:276:40
7:48
-0:09
25.2M
25.20 mi14:23:023:32:588:272:46
8:01
+0:13
Finish
26.22 mi14:30:123:40:088:247:10
7:02
-0:59

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

7:02 /mi

Average Pace

8:24 /mi

Slowest Pace

8:43 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

40:23

18% of race

Time at Steady Pace

2:05:46

57% of race

Time at Slower Pace

53:59

25% of race

Average Pace: 8:24 /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 mi11:16:1526:118:2626:11
8:26
#19460
10K
6.21 mi11:43:0553:018:3226:50
8:38
#20028
15K
9.32 mi12:09:431:19:398:3326:38
8:34
#19954
20K
12.43 mi12:36:491:46:458:3527:06
8:43
#19825
Half
13.11 mi12:42:361:52:328:355:47
8:29
#19784
25K
15.53 mi13:03:192:13:158:3520:43
8:33
#19383
30K
18.64 mi13:30:122:40:088:3526:53
8:39
#18697
20M
20.00 mi13:41:242:51:208:3411:12
8:15
#18198
21M
21.00 mi13:49:492:59:458:348:25
8:25
#17759
35K
21.75 mi13:55:343:05:308:325:45
7:41
#17467
23M
23.00 mi14:05:393:15:358:3010:05
8:03
#17034
24M
24.00 mi14:13:363:23:328:297:57
7:57
#16761
40K
24.85 mi14:20:163:30:128:276:40
7:48
#16450
25.2M
25.20 mi14:23:023:32:588:272:46
8:01
#16289
Finish
26.22 mi14:30:123:40:088:247:10
7:02
#15901
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi194607172717219762(Top 70%)7304(Top 60%)7304(Top 134%)
10K6.21 mi3.10 mi20028-5687482-3107482-31020541(Top 72%)7764(Top 63%)7764(Top 142%)
15K9.32 mi3.11 mi19954+747439+437439+4319762(Top 70%)7304(Top 60%)7304(Top 134%)
20K12.43 mi3.11 mi19825+1297376+637376+6319530(Top 69%)7216(Top 59%)7216(Top 132%)
Half13.11 mi0.68 mi19784+417352+247352+2419047(Top 67%)6906(Top 56%)6906(Top 126%)
25K15.53 mi2.42 mi19383+4017136+2167136+21617454(Top 61%)6110(Top 50%)6110(Top 112%)
30K18.64 mi3.11 mi18697+6866768+3686768+36815730(Top 55%)5301(Top 43%)5301(Top 97%)
20M20.00 mi1.36 mi18198+4996528+2406528+24012121(Top 43%)3525(Top 29%)3525(Top 64%)
21M21.00 mi1.00 mi17759+4396302+2266302+2269996(Top 35%)2619(Top 21%)2619(Top 48%)
35K21.75 mi0.75 mi17467+2926174+1286174+12810072(Top 35%)2658(Top 22%)2658(Top 49%)
23M23.00 mi1.25 mi17034+4335953+2215953+22110470(Top 37%)2993(Top 24%)2993(Top 55%)
24M24.00 mi1.00 mi16761+2735817+1365817+13610952(Top 39%)3294(Top 27%)3294(Top 60%)
40K24.85 mi0.85 mi16450+3115659+1585659+1588821(Top 31%)2391(Top 20%)2391(Top 44%)
25.2M25.20 mi0.35 mi16289+1615577+825577+826188(Top 22%)1346(Top 11%)1346(Top 25%)
Finish26.22 mi1.02 mi15901+3885382+1955382+1956008(Top 21%)1271(Top 10%)1271(Top 23%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 70%
×21story building
+97ft-345ft

Overall

19762

Females

7304

F18-39

7304

5K→10K

3.1 - 6.2 mi

Top 72%
×5story building
+79ft-138ft

Overall

20541

Females

7764

F18-39

7764

10K→15K

6.2 - 9.3 mi

Top 70%
×3story building
+67ft-78ft

Overall

19762

Females

7304

F18-39

7304

15K→20K

9.3 - 12.4 mi

Top 69%
×5story building
+106ft-86ft

Overall

19530

Females

7216

F18-39

7216

20K→Half

12.4 - 13.1 mi

Top 67%
×2story building
+19ft-37ft

Overall

19047

Females

6906

F18-39

6906

Half→25K

13.1 - 15.5 mi

Top 61%
×4story building
+66ft-88ft

Overall

17454

Females

6110

F18-39

6110

25K→30K

15.5 - 18.6 mi

Top 55%
×9story building
+181ft-148ft

Overall

15730

Females

5301

F18-39

5301

30K→20M

18.6 - 20.0 mi

Top 43%
×5story building
+64ft-50ft

Overall

12121

Females

3525

F18-39

3525

20M→21M

20.0 - 21.0 mi

Top 35%
×8story building
+106ft-24ft

Overall

9996

Females

2619

F18-39

2619

21M→35K

21.0 - 21.8 mi

Top 35%
×7story building
+17ft-86ft

Overall

10072

Females

2658

F18-39

2658

35K→23M

21.8 - 23.0 mi

Top 37%
×5story building
+23ft-63ft

Overall

10470

Females

2993

F18-39

2993

23M→24M

23.0 - 24.0 mi

Top 39%
×6story building
+12ft-82ft

Overall

10952

Females

3294

F18-39

3294

24M→40K

24.0 - 24.9 mi

Top 31%
×1story
+6ft-20ft

Overall

8821

Females

2391

F18-39

2391

40K→25.2M

24.9 - 25.2 mi

Top 22%
×1story
+13ft-16ft

Overall

6188

Females

1346

F18-39

1346

25.2M→Finish

25.2 - 26.2 mi

Top 21%
×2story building
+22ft-21ft

Overall

6008

Females

1271

F18-39

1271

Passing Analysis

Category:
Athletes Passed
4536
Passed By
977
Net Change
+3559
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19460
5K → 10K97665-568#19460#20028
10K → 15K228154+74#20028#19954
15K → 20K247118+129#19954#19825
20K → Half5817+41#19825#19784
Half → 25K41312+401#19784#19383
25K → 30K6926+686#19383#18697
30K → 20M4990+499#18697#18198
20M → 21M4390+439#18198#17759
21M → 35K2920+292#17759#17467
35K → 23M4330+433#17467#17034
23M → 24M2763+273#17034#16761
24M → 40K3121+311#16761#16450
40K → 25.2M1610+161#16450#16289
25.2M → Finish3891+388#16289#15901
TOTALS4536977+3559
📊

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