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BOSTON MARATHON 2025

Catherine Shanak

Bib: 20654•F

WI

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 45%
Masters (Masters Women)
#0 / 6759
Top 32%
Division (F40-44)
#0 / 1718
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:25
Rank: #15347
Start → 5K
7:52/mi
24:25 split
10K· 6.21 mi
49:27
Rank: #16167 (-820)
5K → 10K
8:03/mi
25:02 split
15K· 9.32 mi
1:14:47
Rank: #16507 (-340)
10K → 15K
8:09/mi
25:20 split
20K· 12.43 mi
1:40:30
Rank: #16584 (-77)
15K → 20K
8:17/mi
25:43 split
Half· 13.11 mi
1:46:01
Rank: #16579 (+5)
20K → Half
8:05/mi
5:31 split
25K· 15.53 mi
2:06:14
Rank: #16496 (+83)
Half → 25K
8:20/mi
20:13 split
30K· 18.64 mi
2:33:06
Rank: #16305 (+191)
25K → 30K
8:39/mi
26:52 split
20M
2:46:17
Rank: #16600 (-295)
30K → 20M
9:42/mi
13:11 split
21M
2:55:36
Rank: #16470 (+130)
20M → 21M
9:19/mi
9:19 split
35K· 21.75 mi
3:02:00
Rank: #16406 (+64)
21M → 35K
8:33/mi
6:24 split
23M
3:13:08
Rank: #16320 (+86)
35K → 23M
8:54/mi
11:08 split
24M
3:21:53
Rank: #16270 (+50)
23M → 24M
8:45/mi
8:45 split
40K· 24.85 mi
3:29:23
Rank: #16238 (+32)
24M → 40K
8:46/mi
7:30 split
25.2M
3:32:43
Rank: #16220 (+18)
40K → 25.2M
9:40/mi
3:20 split
Finish· 26.22 mi
3:41:10
Rank: #16160 (+60)
25.2M → Finish
8:18/mi
8:27 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:46:01
Pace8:05 /mi
2nd Half
Distance13.11 mi
Time1:55:09
Pace8:47 /mi
📊Positive Split: 8.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:40:4524:257:5224:25
7:52
-
10K
6.21 mi12:05:4749:277:5725:02
8:03
+0:11
15K
9.32 mi12:31:071:14:478:0125:20
8:09
+0:06
20K
12.43 mi12:56:501:40:308:0525:43
8:17
+0:08
Half
13.11 mi13:02:211:46:018:055:31
8:05
-0:12
25K
15.53 mi13:22:342:06:148:0820:13
8:20
+0:15
30K
18.64 mi13:49:262:33:068:1326:52
8:39
+0:19
20M
20.00 mi14:02:372:46:178:1913:11
9:42
+1:03
21M
21.00 mi14:11:562:55:368:229:19
9:19
-0:23
35K
21.75 mi14:18:203:02:008:226:24
8:33
-0:46
23M
23.00 mi14:29:283:13:088:2411:08
8:54
+0:21
24M
24.00 mi14:38:133:21:538:258:45
8:45
-0:09
40K
24.85 mi14:45:433:29:238:257:30
8:46
+0:01
25.2M
25.20 mi14:49:033:32:438:263:20
9:40
+0:54
Finish
26.22 mi14:57:303:41:108:268:27
8:18
-1:22

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

7:52 /mi

Average Pace

8:26 /mi

Slowest Pace

9:42 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:20:18

36% of race

Time at Steady Pace

1:43:54

47% of race

Time at Slower Pace

36:58

17% of race

Average Pace: 8:26 /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 mi11:40:4524:257:5224:25
7:52
#15347
10K
6.21 mi12:05:4749:277:5725:02
8:03
#16167
15K
9.32 mi12:31:071:14:478:0125:20
8:09
#16507
20K
12.43 mi12:56:501:40:308:0525:43
8:17
#16584
Half
13.11 mi13:02:211:46:018:055:31
8:05
#16579
25K
15.53 mi13:22:342:06:148:0820:13
8:20
#16496
30K
18.64 mi13:49:262:33:068:1326:52
8:39
#16305
20M
20.00 mi14:02:372:46:178:1913:11
9:42
#16600
21M
21.00 mi14:11:562:55:368:229:19
9:19
#16470
35K
21.75 mi14:18:203:02:008:226:24
8:33
#16406
23M
23.00 mi14:29:283:13:088:2411:08
8:54
#16320
24M
24.00 mi14:38:133:21:538:258:45
8:45
#16270
40K
24.85 mi14:45:433:29:238:257:30
8:46
#16238
25.2M
25.20 mi14:49:033:32:438:263:20
9:40
#16220
Finish
26.22 mi14:57:303:41:108:268:27
8:18
#16160
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi153474750475017108(Top 60%)5794(Top 47%)5794(Top 337%)
10K6.21 mi3.10 mi16167-8205246-4965246-49616904(Top 60%)5649(Top 46%)5649(Top 329%)
15K9.32 mi3.11 mi16507-3405438-1925438-19217108(Top 60%)5794(Top 47%)5794(Top 337%)
20K12.43 mi3.11 mi16584-775490-525490-5216808(Top 59%)5669(Top 46%)5669(Top 330%)
Half13.11 mi0.68 mi16579+55489+15489+116572(Top 58%)5518(Top 45%)5518(Top 321%)
25K15.53 mi2.42 mi16496+835457+325457+3216179(Top 57%)5416(Top 44%)5416(Top 315%)
30K18.64 mi3.11 mi16305+1915418+395418+3915696(Top 55%)5282(Top 43%)5282(Top 307%)
20M20.00 mi1.36 mi16600-2955610-1925610-19219941(Top 70%)7750(Top 63%)7750(Top 451%)
21M21.00 mi1.00 mi16470+1305568+425568+4215256(Top 54%)5320(Top 44%)5320(Top 310%)
35K21.75 mi0.75 mi16406+645546+225546+2215825(Top 56%)5682(Top 46%)5682(Top 331%)
23M23.00 mi1.25 mi16320+865529+175529+1715652(Top 55%)5694(Top 47%)5694(Top 331%)
24M24.00 mi1.00 mi16270+505530-15530-116037(Top 56%)5946(Top 49%)5946(Top 346%)
40K24.85 mi0.85 mi16238+325535-55535-515053(Top 53%)5548(Top 45%)5548(Top 323%)
25.2M25.20 mi0.35 mi16220+185536-15536-115498(Top 55%)5822(Top 48%)5822(Top 339%)
Finish26.22 mi1.02 mi16160+605522+145522+1414892(Top 52%)5420(Top 44%)5420(Top 315%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 60%
×21story building
+97ft-345ft

Overall

17108

Females

5794

F40-44

5794

5K→10K

3.1 - 6.2 mi

Top 60%
×5story building
+79ft-138ft

Overall

16904

Females

5649

F40-44

5649

10K→15K

6.2 - 9.3 mi

Top 60%
×3story building
+67ft-78ft

Overall

17108

Females

5794

F40-44

5794

15K→20K

9.3 - 12.4 mi

Top 59%
×5story building
+106ft-86ft

Overall

16808

Females

5669

F40-44

5669

20K→Half

12.4 - 13.1 mi

Top 58%
×2story building
+19ft-37ft

Overall

16572

Females

5518

F40-44

5518

Half→25K

13.1 - 15.5 mi

Top 57%
×4story building
+66ft-88ft

Overall

16179

Females

5416

F40-44

5416

25K→30K

15.5 - 18.6 mi

Top 55%
×9story building
+181ft-148ft

Overall

15696

Females

5282

F40-44

5282

30K→20M

18.6 - 20.0 mi

Top 70%
×5story building
+64ft-50ft

Overall

19941

Females

7750

F40-44

7750

20M→21M

20.0 - 21.0 mi

Top 54%
×8story building
+106ft-24ft

Overall

15256

Females

5320

F40-44

5320

21M→35K

21.0 - 21.8 mi

Top 56%
×7story building
+17ft-86ft

Overall

15825

Females

5682

F40-44

5682

35K→23M

21.8 - 23.0 mi

Top 55%
×5story building
+23ft-63ft

Overall

15652

Females

5694

F40-44

5694

23M→24M

23.0 - 24.0 mi

Top 56%
×6story building
+12ft-82ft

Overall

16037

Females

5946

F40-44

5946

24M→40K

24.0 - 24.9 mi

Top 53%
×1story
+6ft-20ft

Overall

15053

Females

5548

F40-44

5548

40K→25.2M

24.9 - 25.2 mi

Top 55%
×1story
+13ft-16ft

Overall

15498

Females

5822

F40-44

5822

25.2M→Finish

25.2 - 26.2 mi

Top 52%
×2story building
+22ft-21ft

Overall

14892

Females

5420

F40-44

5420

Passing Analysis

Category:
Athletes Passed
1721
Passed By
2534
Net Change
-813
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15347
5K → 10K88908-820#15347#16167
10K → 15K111451-340#16167#16507
15K → 20K185262-77#16507#16584
20K → Half3631+5#16584#16579
Half → 25K190107+83#16579#16496
25K → 30K323132+191#16496#16305
30K → 20M42337-295#16305#16600
20M → 21M17444+130#16600#16470
21M → 35K9026+64#16470#16406
35K → 23M15165+86#16406#16320
23M → 24M10252+50#16320#16270
24M → 40K8452+32#16270#16238
40K → 25.2M3921+18#16238#16220
25.2M → Finish10646+60#16220#16160
TOTALS17212534-813
📊

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