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BOSTON MARATHON 2025

Mary Cass

Bib: 24467•F

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F60-64)
#0 / 624
Top 20%
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
8:05/mi
25:08
↑ 97↓ 3451.5%
10K· 6.21 mi
8:22/mi
51:08
↑ 79↓ 1380.4%
15K· 9.32 mi
8:38/mi
1:17:57
↑ 67↓ 78
20K· 12.43 mi
8:54/mi
1:45:36
↑ 106↓ 860.1%
Half· 13.11 mi
8:55/mi
1:51:41
↑ 19↓ 370.5%
25K· 15.53 mi
9:09/mi
2:13:53
↑ 66↓ 880.2%
30K· 18.64 mi
9:44/mi
2:44:06
↑ 181↓ 1480.2%
20M
10:08/mi
2:57:52
↑ 64↓ 500.2%
21M
12:22/mi
3:10:14
↑ 106↓ 241.6%
35K· 21.75 mi
8:36/mi
3:16:40
↑ 17↓ 861.7%
23M
8:58/mi
3:27:54
↑ 23↓ 630.6%
24M
8:38/mi
3:36:32
↓ 821.3%
40K· 24.85 mi
8:50/mi
3:44:05
↓ 200.3%
25.2M
11:04/mi
3:47:54
↑ 13↓ 160.2%
Finish· 26.22 mi
8:30/mi
3:56:34
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:51:41
Pace8:31 /mi
2nd Half
Distance13.11 mi
Time2:04:53
Pace9:32 /mi
📊Positive Split: 11.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:23:3825:088:0525:08
8:05
-
10K
6.21 mi11:49:3851:088:1426:00
8:22
+0:17
15K
9.32 mi12:16:271:17:578:2226:49
8:38
+0:16
20K
12.43 mi12:44:061:45:368:3027:39
8:54
+0:16
Half
13.11 mi12:50:111:51:418:316:05
8:55
+0:01
25K
15.53 mi13:12:232:13:538:3722:12
9:09
+0:14
30K
18.64 mi13:42:362:44:068:4830:13
9:44
+0:35
20M
20.00 mi13:56:222:57:528:5413:46
10:08
+0:24
21M
21.00 mi14:08:443:10:149:0412:22
12:22
+2:14
35K
21.75 mi14:15:103:16:409:036:26
8:36
-3:46
23M
23.00 mi14:26:243:27:549:0211:14
8:58
+0:22
24M
24.00 mi14:35:023:36:329:018:38
8:38
-0:20
40K
24.85 mi14:42:353:44:059:017:33
8:50
+0:12
25.2M
25.20 mi14:46:243:47:549:033:49
11:04
+2:14
Finish
26.22 mi14:55:043:56:349:028:40
8:30
-2:34

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

8:05 /mi

Average Pace

9:02 /mi

Slowest Pace

12:22 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

25:08

11% of race

Time at Steady Pace

2:31:16

64% of race

Time at Slower Pace

1:00:10

25% of race

Average Pace: 9:01 /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 mi11:23:3825:088:0525:08
8:05
#17289
10K
6.21 mi11:49:3851:088:1426:00
8:22
#18178
15K
9.32 mi12:16:271:17:578:2226:49
8:38
#18814
20K
12.43 mi12:44:061:45:368:3027:39
8:54
#19253
Half
13.11 mi12:50:111:51:418:316:05
8:55
#19390
25K
15.53 mi13:12:232:13:538:3722:12
9:09
#19614
30K
18.64 mi13:42:362:44:068:4830:13
9:44
#19882
20M
20.00 mi13:56:222:57:528:5413:46
10:08
#20056
21M
21.00 mi14:08:443:10:149:0412:22
12:22
#20476
35K
21.75 mi14:15:103:16:409:036:26
8:36
#20314
23M
23.00 mi14:26:243:27:549:0211:14
8:58
#20105
24M
24.00 mi14:35:023:36:329:018:38
8:38
#19906
40K
24.85 mi14:42:353:44:059:017:33
8:50
#19760
25.2M
25.20 mi14:46:243:47:549:033:49
11:04
#19786
Finish
26.22 mi14:55:043:56:349:028:40
8:30
#19669
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF60-64Seg. OverallSeg. FemalesSeg. F60-64
5K3.11 mi3.11 mi172895915591520105(Top 71%)7491(Top 61%)7491(Top 1200%)
10K6.21 mi3.10 mi18178-8896438-5236438-52319009(Top 67%)6890(Top 56%)6890(Top 1104%)
15K9.32 mi3.11 mi18814-6366797-3596797-35920105(Top 71%)7491(Top 61%)7491(Top 1200%)
20K12.43 mi3.11 mi19253-4397048-2517048-25120471(Top 72%)7754(Top 63%)7754(Top 1243%)
Half13.11 mi0.68 mi19390-1377129-817129-8121482(Top 76%)8293(Top 68%)8293(Top 1329%)
25K15.53 mi2.42 mi19614-2247268-1397268-13920593(Top 73%)7867(Top 64%)7867(Top 1261%)
30K18.64 mi3.11 mi19882-2687454-1867454-18620763(Top 73%)8095(Top 66%)8095(Top 1297%)
20M20.00 mi1.36 mi20056-1747580-1267580-12621386(Top 75%)8564(Top 70%)8564(Top 1372%)
21M21.00 mi1.00 mi20476-4207843-2637843-26324204(Top 85%)10134(Top 83%)10134(Top 1624%)
35K21.75 mi0.75 mi20314+1627769+747769+7416123(Top 57%)5866(Top 48%)5866(Top 940%)
23M23.00 mi1.25 mi20105+2097682+877682+8716134(Top 57%)5968(Top 49%)5968(Top 956%)
24M24.00 mi1.00 mi19906+1997597+857597+8515397(Top 54%)5608(Top 46%)5608(Top 899%)
40K24.85 mi0.85 mi19760+1467528+697528+6915413(Top 54%)5770(Top 47%)5770(Top 925%)
25.2M25.20 mi0.35 mi19786-267548-207548-2020869(Top 73%)8583(Top 70%)8583(Top 1375%)
Finish26.22 mi1.02 mi19669+1177502+467502+4616295(Top 57%)6199(Top 51%)6199(Top 993%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 71%
×21story building
+97ft-345ft

Overall

20105

Females

7491

F60-64

7491

5K→10K

3.1 - 6.2 mi

Top 67%
×5story building
+79ft-138ft

Overall

19009

Females

6890

F60-64

6890

10K→15K

6.2 - 9.3 mi

Top 71%
×3story building
+67ft-78ft

Overall

20105

Females

7491

F60-64

7491

15K→20K

9.3 - 12.4 mi

Top 72%
×5story building
+106ft-86ft

Overall

20471

Females

7754

F60-64

7754

20K→Half

12.4 - 13.1 mi

Top 76%
×2story building
+19ft-37ft

Overall

21482

Females

8293

F60-64

8293

Half→25K

13.1 - 15.5 mi

Top 73%
×4story building
+66ft-88ft

Overall

20593

Females

7867

F60-64

7867

25K→30K

15.5 - 18.6 mi

Top 73%
×9story building
+181ft-148ft

Overall

20763

Females

8095

F60-64

8095

30K→20M

18.6 - 20.0 mi

Top 75%
×5story building
+64ft-50ft

Overall

21386

Females

8564

F60-64

8564

20M→21M

20.0 - 21.0 mi

Top 85%
×8story building
+106ft-24ft

Overall

24204

Females

10134

F60-64

10134

21M→35K

21.0 - 21.8 mi

Top 57%
×7story building
+17ft-86ft

Overall

16123

Females

5866

F60-64

5866

35K→23M

21.8 - 23.0 mi

Top 57%
×5story building
+23ft-63ft

Overall

16134

Females

5968

F60-64

5968

23M→24M

23.0 - 24.0 mi

Top 54%
×6story building
+12ft-82ft

Overall

15397

Females

5608

F60-64

5608

24M→40K

24.0 - 24.9 mi

Top 54%
×1story
+6ft-20ft

Overall

15413

Females

5770

F60-64

5770

40K→25.2M

24.9 - 25.2 mi

Top 73%
×1story
+13ft-16ft

Overall

20869

Females

8583

F60-64

8583

25.2M→Finish

25.2 - 26.2 mi

Top 57%
×2story building
+22ft-21ft

Overall

16295

Females

6199

F60-64

6199

Passing Analysis

Category:
Athletes Passed
1412
Passed By
3792
Net Change
-2380
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17289
5K → 10K66955-889#17289#18178
10K → 15K45681-636#18178#18814
15K → 20K89528-439#18814#19253
20K → Half7144-137#19253#19390
Half → 25K107331-224#19390#19614
25K → 30K140408-268#19614#19882
30K → 20M65239-174#19882#20056
20M → 21M16436-420#20056#20476
21M → 35K1642+162#20476#20314
35K → 23M2134+209#20314#20105
23M → 24M2034+199#20105#19906
24M → 40K1482+146#19906#19760
40K → 25.2M1743-26#19760#19786
25.2M → Finish13215+117#19786#19669
TOTALS14123792-2380
📊

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