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BOSTON MARATHON 2025

Stefanie Bernosky

Bib: 18932•F

WA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F40-44)
#0 / 1718
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
8:50/mi
27:26
↑ 97↓ 3451.5%
10K· 6.21 mi
8:43/mi
54:31
↑ 79↓ 1380.4%
15K· 9.32 mi
8:58/mi
1:22:24
↑ 67↓ 78
20K· 12.43 mi
8:46/mi
1:49:39
↑ 106↓ 860.1%
Half· 13.11 mi
8:26/mi
1:55:24
↑ 19↓ 370.5%
25K· 15.53 mi
8:52/mi
2:16:55
↑ 66↓ 880.2%
30K· 18.64 mi
9:18/mi
2:45:49
↑ 181↓ 1480.2%
20M
10:33/mi
3:00:09
↑ 64↓ 500.2%
21M
10:01/mi
3:10:10
↑ 106↓ 241.6%
35K· 21.75 mi
9:23/mi
3:17:11
↑ 17↓ 861.7%
23M
9:33/mi
3:29:09
↑ 23↓ 630.6%
24M
9:36/mi
3:38:45
↓ 821.3%
40K· 24.85 mi
9:56/mi
3:47:15
↓ 200.3%
25.2M
11:33/mi
3:51:14
↑ 13↓ 160.2%
Finish· 26.22 mi
9:31/mi
4:00:56
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:55:24
Pace8:48 /mi
2nd Half
Distance13.11 mi
Time2:05:32
Pace9:35 /mi
📊Positive Split: 8.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:23:5927:268:5027:26
8:50
-
10K
6.21 mi11:51:0454:318:4627:05
8:43
-0:07
15K
9.32 mi12:18:571:22:248:5027:53
8:58
+0:15
20K
12.43 mi12:46:121:49:398:4927:15
8:46
-0:12
Half
13.11 mi12:51:571:55:248:485:45
8:26
-0:20
25K
15.53 mi13:13:282:16:558:4921:31
8:52
+0:26
30K
18.64 mi13:42:222:45:498:5428:54
9:18
+0:26
20M
20.00 mi13:56:423:00:099:0014:20
10:33
+1:15
21M
21.00 mi14:06:433:10:109:0310:01
10:01
-0:32
35K
21.75 mi14:13:443:17:119:047:01
9:23
-0:38
23M
23.00 mi14:25:423:29:099:0611:58
9:33
+0:10
24M
24.00 mi14:35:183:38:459:079:36
9:36
+0:03
40K
24.85 mi14:43:483:47:159:098:30
9:56
+0:20
25.2M
25.20 mi14:47:473:51:149:113:59
11:33
+1:37
Finish
26.22 mi14:57:294:00:569:129:42
9:31
-2:02

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

8:26 /mi

Average Pace

9:12 /mi

Slowest Pace

11:33 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:16:55

57% of race

Time at Steady Pace

1:07:11

28% of race

Time at Slower Pace

36:50

15% of race

Average Pace: 9:11 /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 mi11:23:5927:268:5027:26
8:50
#21671
10K
6.21 mi11:51:0454:318:4627:05
8:43
#21312
15K
9.32 mi12:18:571:22:248:5027:53
8:58
#21490
20K
12.43 mi12:46:121:49:398:4927:15
8:46
#21040
Half
13.11 mi12:51:571:55:248:485:45
8:26
#20943
25K
15.53 mi13:13:282:16:558:4921:31
8:52
#20692
30K
18.64 mi13:42:222:45:498:5428:54
9:18
#20352
20M
20.00 mi13:56:423:00:099:0014:20
10:33
#20598
21M
21.00 mi14:06:433:10:109:0310:01
10:01
#20456
35K
21.75 mi14:13:443:17:119:047:01
9:23
#20444
23M
23.00 mi14:25:423:29:099:0611:58
9:33
#20349
24M
24.00 mi14:35:183:38:459:079:36
9:36
#20360
40K
24.85 mi14:43:483:47:159:098:30
9:56
#20374
25.2M
25.20 mi14:47:473:51:149:113:59
11:33
#20446
Finish
26.22 mi14:57:294:00:569:129:42
9:31
#20499
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi216718446844621924(Top 77%)8503(Top 70%)8503(Top 495%)
10K6.21 mi3.10 mi21312+3598222+2248222+22420980(Top 74%)8010(Top 66%)8010(Top 466%)
15K9.32 mi3.11 mi21490-1788298-768298-7621924(Top 77%)8503(Top 70%)8503(Top 495%)
20K12.43 mi3.11 mi21040+4508054+2448054+24419808(Top 70%)7379(Top 60%)7379(Top 430%)
Half13.11 mi0.68 mi20943+978001+538001+5318814(Top 66%)6808(Top 56%)6808(Top 396%)
25K15.53 mi2.42 mi20692+2517872+1297872+12919325(Top 68%)7162(Top 59%)7162(Top 417%)
30K18.64 mi3.11 mi20352+3407731+1417731+14119131(Top 67%)7190(Top 59%)7190(Top 419%)
20M20.00 mi1.36 mi20598-2467885-1547885-15422573(Top 79%)9194(Top 75%)9194(Top 535%)
21M21.00 mi1.00 mi20456+1427832+537832+5318387(Top 65%)7005(Top 57%)7005(Top 408%)
35K21.75 mi0.75 mi20444+127837-57837-519895(Top 70%)7926(Top 65%)7926(Top 461%)
23M23.00 mi1.25 mi20349+957815+227815+2218948(Top 67%)7489(Top 61%)7489(Top 436%)
24M24.00 mi1.00 mi20360-117830-157830-1520004(Top 70%)8086(Top 66%)8086(Top 471%)
40K24.85 mi0.85 mi20374-147855-257855-2520275(Top 71%)8295(Top 68%)8295(Top 483%)
25.2M25.20 mi0.35 mi20446-727900-457900-4522196(Top 78%)9246(Top 76%)9246(Top 538%)
Finish26.22 mi1.02 mi20499-537941-417941-4121245(Top 75%)8783(Top 72%)8783(Top 511%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 77%
×21story building
+97ft-345ft

Overall

21924

Females

8503

F40-44

8503

5K→10K

3.1 - 6.2 mi

Top 74%
×5story building
+79ft-138ft

Overall

20980

Females

8010

F40-44

8010

10K→15K

6.2 - 9.3 mi

Top 77%
×3story building
+67ft-78ft

Overall

21924

Females

8503

F40-44

8503

15K→20K

9.3 - 12.4 mi

Top 70%
×5story building
+106ft-86ft

Overall

19808

Females

7379

F40-44

7379

20K→Half

12.4 - 13.1 mi

Top 66%
×2story building
+19ft-37ft

Overall

18814

Females

6808

F40-44

6808

Half→25K

13.1 - 15.5 mi

Top 68%
×4story building
+66ft-88ft

Overall

19325

Females

7162

F40-44

7162

25K→30K

15.5 - 18.6 mi

Top 67%
×9story building
+181ft-148ft

Overall

19131

Females

7190

F40-44

7190

30K→20M

18.6 - 20.0 mi

Top 79%
×5story building
+64ft-50ft

Overall

22573

Females

9194

F40-44

9194

20M→21M

20.0 - 21.0 mi

Top 65%
×8story building
+106ft-24ft

Overall

18387

Females

7005

F40-44

7005

21M→35K

21.0 - 21.8 mi

Top 70%
×7story building
+17ft-86ft

Overall

19895

Females

7926

F40-44

7926

35K→23M

21.8 - 23.0 mi

Top 67%
×5story building
+23ft-63ft

Overall

18948

Females

7489

F40-44

7489

23M→24M

23.0 - 24.0 mi

Top 70%
×6story building
+12ft-82ft

Overall

20004

Females

8086

F40-44

8086

24M→40K

24.0 - 24.9 mi

Top 71%
×1story
+6ft-20ft

Overall

20275

Females

8295

F40-44

8295

40K→25.2M

24.9 - 25.2 mi

Top 78%
×1story
+13ft-16ft

Overall

22196

Females

9246

F40-44

9246

25.2M→Finish

25.2 - 26.2 mi

Top 75%
×2story building
+22ft-21ft

Overall

21245

Females

8783

F40-44

8783

Passing Analysis

Category:
Athletes Passed
2456
Passed By
1284
Net Change
+1172
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21671
5K → 10K496137+359#21671#21312
10K → 15K150328-178#21312#21490
15K → 20K47525+450#21490#21040
20K → Half1036+97#21040#20943
Half → 25K28635+251#20943#20692
25K → 30K39555+340#20692#20352
30K → 20M45291-246#20352#20598
20M → 21M15715+142#20598#20456
21M → 35K6553+12#20456#20444
35K → 23M13540+95#20444#20349
23M → 24M4758-11#20349#20360
24M → 40K5569-14#20360#20374
40K → 25.2M1082-72#20374#20446
25.2M → Finish3790-53#20446#20499
TOTALS24561284+1172
📊

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