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BOSTON MARATHON 2025

Laurie Cass

Bib: 24087•F

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 47%
Masters (Masters Women)
#0 / 6759
Top 35%
Division (F50-54)
#0 / 1303
Top 29%
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
7:49/mi
24:16
↑ 97↓ 3451.5%
10K· 6.21 mi
8:00/mi
49:08
↑ 79↓ 1380.4%
15K· 9.32 mi
8:08/mi
1:14:25
↑ 67↓ 78
20K· 12.43 mi
8:17/mi
1:40:10
↑ 106↓ 860.1%
Half· 13.11 mi
7:59/mi
1:45:37
↑ 19↓ 370.5%
25K· 15.53 mi
8:17/mi
2:05:42
↑ 66↓ 880.2%
30K· 18.64 mi
8:51/mi
2:33:13
↑ 181↓ 1480.2%
20M
11:10/mi
2:48:23
↑ 64↓ 500.2%
21M
8:54/mi
2:57:17
↑ 106↓ 241.6%
35K· 21.75 mi
9:41/mi
3:04:32
↑ 17↓ 861.7%
23M
8:26/mi
3:15:05
↑ 23↓ 630.6%
24M
8:27/mi
3:23:32
↓ 821.3%
40K· 24.85 mi
8:40/mi
3:30:57
↓ 200.3%
25.2M
9:28/mi
3:34:13
↑ 13↓ 160.2%
Finish· 26.22 mi
8:38/mi
3:43:01
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:45:37
Pace8:03 /mi
2nd Half
Distance13.11 mi
Time1:57:24
Pace8:57 /mi
📊Positive Split: 11.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:21:2224:167:4924:16
7:49
-
10K
6.21 mi11:46:1449:087:5424:52
8:00
+0:11
15K
9.32 mi12:11:311:14:257:5925:17
8:08
+0:08
20K
12.43 mi12:37:161:40:108:0425:45
8:17
+0:09
Half
13.11 mi12:42:431:45:378:035:27
7:59
-0:18
25K
15.53 mi13:02:482:05:428:0620:05
8:17
+0:18
30K
18.64 mi13:30:192:33:138:1327:31
8:51
+0:34
20M
20.00 mi13:45:292:48:238:2515:10
11:10
+2:19
21M
21.00 mi13:54:232:57:178:278:54
8:54
-2:16
35K
21.75 mi14:01:383:04:328:297:15
9:41
+0:47
23M
23.00 mi14:12:113:15:058:2910:33
8:26
-1:15
24M
24.00 mi14:20:383:23:328:298:27
8:27
+0:01
40K
24.85 mi14:28:033:30:578:297:25
8:40
+0:13
25.2M
25.20 mi14:31:193:34:138:303:16
9:28
+0:48
Finish
26.22 mi14:40:073:43:018:318:48
8:38
-0:50

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

7:49 /mi

Average Pace

8:31 /mi

Slowest Pace

11:10 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

54:35

24% of race

Time at Steady Pace

2:13:51

60% of race

Time at Slower Pace

34:35

16% of race

Average Pace: 8:30 /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 mi11:21:2224:167:4924:16
7:49
#14925
10K
6.21 mi11:46:1449:087:5424:52
8:00
#15760
15K
9.32 mi12:11:311:14:257:5925:17
8:08
#16210
20K
12.43 mi12:37:161:40:108:0425:45
8:17
#16386
Half
13.11 mi12:42:431:45:378:035:27
7:59
#16356
25K
15.53 mi13:02:482:05:428:0620:05
8:17
#16268
30K
18.64 mi13:30:192:33:138:1327:31
8:51
#16343
20M
20.00 mi13:45:292:48:238:2515:10
11:10
#17261
21M
21.00 mi13:54:232:57:178:278:54
8:54
#16961
35K
21.75 mi14:01:383:04:328:297:15
9:41
#17182
23M
23.00 mi14:12:113:15:058:2910:33
8:26
#16895
24M
24.00 mi14:20:383:23:328:298:27
8:27
#16763
40K
24.85 mi14:28:033:30:578:297:25
8:40
#16655
25.2M
25.20 mi14:31:193:34:138:303:16
9:28
#16629
Finish
26.22 mi14:40:073:43:018:318:48
8:38
#16627
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi149254484448417007(Top 60%)5736(Top 47%)5736(Top 440%)
10K6.21 mi3.10 mi15760-8354998-5144998-51416531(Top 58%)5441(Top 44%)5441(Top 418%)
15K9.32 mi3.11 mi16210-4505259-2615259-26117007(Top 60%)5736(Top 47%)5736(Top 440%)
20K12.43 mi3.11 mi16386-1765372-1135372-11316876(Top 59%)5708(Top 47%)5708(Top 438%)
Half13.11 mi0.68 mi16356+305357+155357+1515886(Top 56%)5121(Top 42%)5121(Top 393%)
25K15.53 mi2.42 mi16268+885323+345323+3415828(Top 56%)5216(Top 43%)5216(Top 400%)
30K18.64 mi3.11 mi16343-755437-1145437-11416936(Top 60%)5995(Top 49%)5995(Top 460%)
20M20.00 mi1.36 mi17261-9186003-5666003-56623906(Top 84%)9904(Top 81%)9904(Top 760%)
21M21.00 mi1.00 mi16961+3005854+1495854+14912975(Top 46%)4118(Top 34%)4118(Top 316%)
35K21.75 mi0.75 mi17182-2216009-1556009-15520984(Top 74%)8488(Top 69%)8488(Top 651%)
23M23.00 mi1.25 mi16895+2875876+1335876+13312879(Top 45%)4211(Top 34%)4211(Top 323%)
24M24.00 mi1.00 mi16763+1325819+575819+5714232(Top 50%)4951(Top 40%)4951(Top 380%)
40K24.85 mi0.85 mi16655+1085787+325787+3214504(Top 51%)5249(Top 43%)5249(Top 403%)
25.2M25.20 mi0.35 mi16629+265780+75780+714518(Top 51%)5307(Top 43%)5307(Top 407%)
Finish26.22 mi1.02 mi16627+25803-235803-2317098(Top 60%)6603(Top 54%)6603(Top 507%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 60%
×21story building
+97ft-345ft

Overall

17007

Females

5736

F50-54

5736

5K→10K

3.1 - 6.2 mi

Top 58%
×5story building
+79ft-138ft

Overall

16531

Females

5441

F50-54

5441

10K→15K

6.2 - 9.3 mi

Top 60%
×3story building
+67ft-78ft

Overall

17007

Females

5736

F50-54

5736

15K→20K

9.3 - 12.4 mi

Top 59%
×5story building
+106ft-86ft

Overall

16876

Females

5708

F50-54

5708

20K→Half

12.4 - 13.1 mi

Top 56%
×2story building
+19ft-37ft

Overall

15886

Females

5121

F50-54

5121

Half→25K

13.1 - 15.5 mi

Top 56%
×4story building
+66ft-88ft

Overall

15828

Females

5216

F50-54

5216

25K→30K

15.5 - 18.6 mi

Top 60%
×9story building
+181ft-148ft

Overall

16936

Females

5995

F50-54

5995

30K→20M

18.6 - 20.0 mi

Top 84%
×5story building
+64ft-50ft

Overall

23906

Females

9904

F50-54

9904

20M→21M

20.0 - 21.0 mi

Top 46%
×8story building
+106ft-24ft

Overall

12975

Females

4118

F50-54

4118

21M→35K

21.0 - 21.8 mi

Top 74%
×7story building
+17ft-86ft

Overall

20984

Females

8488

F50-54

8488

35K→23M

21.8 - 23.0 mi

Top 45%
×5story building
+23ft-63ft

Overall

12879

Females

4211

F50-54

4211

23M→24M

23.0 - 24.0 mi

Top 50%
×6story building
+12ft-82ft

Overall

14232

Females

4951

F50-54

4951

24M→40K

24.0 - 24.9 mi

Top 51%
×1story
+6ft-20ft

Overall

14504

Females

5249

F50-54

5249

40K→25.2M

24.9 - 25.2 mi

Top 51%
×1story
+13ft-16ft

Overall

14518

Females

5307

F50-54

5307

25.2M→Finish

25.2 - 26.2 mi

Top 60%
×2story building
+22ft-21ft

Overall

17098

Females

6603

F50-54

6603

Passing Analysis

Category:
Athletes Passed
1823
Passed By
3525
Net Change
-1702
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14925
5K → 10K85920-835#14925#15760
10K → 15K87537-450#15760#16210
15K → 20K156332-176#16210#16386
20K → Half5424+30#16386#16356
Half → 25K200112+88#16356#16268
25K → 30K199274-75#16268#16343
30K → 20M15933-918#16343#17261
20M → 21M3044+300#17261#16961
21M → 35K24245-221#16961#17182
35K → 23M2947+287#17182#16895
23M → 24M15119+132#16895#16763
24M → 40K12921+108#16763#16655
40K → 25.2M4620+26#16655#16629
25.2M → Finish7977+2#16629#16627
TOTALS18233525-1702
📊

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