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BOSTON MARATHON 2025

Megan Kossar

Bib: 18853•F

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 41%
Masters (Masters Women)
#0 / 6759
Top 27%
Division (F50-54)
#0 / 1303
Top 19%
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
7:57/mi
24:41
↑ 97↓ 3451.5%
10K· 6.21 mi
7:50/mi
49:01
↑ 79↓ 1380.4%
15K· 9.32 mi
7:52/mi
1:13:26
↑ 67↓ 78
20K· 12.43 mi
8:10/mi
1:38:47
↑ 106↓ 860.1%
Half· 13.11 mi
8:04/mi
1:44:17
↑ 19↓ 370.5%
25K· 15.53 mi
8:27/mi
2:04:46
↑ 66↓ 880.2%
30K· 18.64 mi
8:53/mi
2:32:22
↑ 181↓ 1480.2%
20M
8:56/mi
2:44:31
↑ 64↓ 500.2%
21M
9:26/mi
2:53:57
↑ 106↓ 241.6%
35K· 21.75 mi
8:17/mi
3:00:09
↑ 17↓ 861.7%
23M
8:47/mi
3:11:09
↑ 23↓ 630.6%
24M
8:09/mi
3:19:18
↓ 821.3%
40K· 24.85 mi
8:08/mi
3:26:15
↓ 200.3%
25.2M
8:27/mi
3:29:10
↑ 13↓ 160.2%
Finish· 26.22 mi
8:19/mi
3:37:39
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:44:17
Pace7:57 /mi
2nd Half
Distance13.11 mi
Time1:53:22
Pace8:39 /mi
📊Positive Split: 8.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:2124:417:5724:41
7:57
-
10K
6.21 mi11:39:4149:017:5324:20
7:50
-0:07
15K
9.32 mi12:04:061:13:267:5324:25
7:52
+0:02
20K
12.43 mi12:29:271:38:477:5725:21
8:10
+0:18
Half
13.11 mi12:34:571:44:177:575:30
8:04
-0:06
25K
15.53 mi12:55:262:04:468:0220:29
8:27
+0:23
30K
18.64 mi13:23:022:32:228:1027:36
8:53
+0:26
20M
20.00 mi13:35:112:44:318:1412:09
8:56
+0:03
21M
21.00 mi13:44:372:53:578:179:26
9:26
+0:30
35K
21.75 mi13:50:493:00:098:176:12
8:17
-1:09
23M
23.00 mi14:01:493:11:098:1911:00
8:47
+0:30
24M
24.00 mi14:09:583:19:188:188:09
8:09
-0:38
40K
24.85 mi14:16:553:26:158:186:57
8:08
-0:01
25.2M
25.20 mi14:19:503:29:108:182:55
8:27
+0:19
Finish
26.22 mi14:28:193:37:398:188:29
8:19
-0:08

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

7:50 /mi

Average Pace

8:18 /mi

Slowest Pace

9:26 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:13:26

34% of race

Time at Steady Pace

1:24:02

39% of race

Time at Slower Pace

1:00:11

28% of race

Average Pace: 8:18 /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 mi11:15:2124:417:5724:41
7:57
#16161
10K
6.21 mi11:39:4149:017:5324:20
7:50
#15577
15K
9.32 mi12:04:061:13:267:5324:25
7:52
#15324
20K
12.43 mi12:29:271:38:477:5725:21
8:10
#15539
Half
13.11 mi12:34:571:44:177:575:30
8:04
#15585
25K
15.53 mi12:55:262:04:468:0220:29
8:27
#15822
30K
18.64 mi13:23:022:32:228:1027:36
8:53
#16033
20M
20.00 mi13:35:112:44:318:1412:09
8:56
#16048
21M
21.00 mi13:44:372:53:578:179:26
9:26
#15973
35K
21.75 mi13:50:493:00:098:176:12
8:17
#15854
23M
23.00 mi14:01:493:11:098:1911:00
8:47
#15750
24M
24.00 mi14:09:583:19:188:188:09
8:09
#15606
40K
24.85 mi14:16:553:26:158:186:57
8:08
#15433
25.2M
25.20 mi14:19:503:29:108:182:55
8:27
#15322
Finish
26.22 mi14:28:193:37:398:188:29
8:19
#15298
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi161615239523914915(Top 53%)4542(Top 37%)4542(Top 349%)
10K6.21 mi3.10 mi15577+5844887+3524887+35215129(Top 53%)4617(Top 38%)4617(Top 354%)
15K9.32 mi3.11 mi15324+2534747+1404747+14014915(Top 53%)4542(Top 37%)4542(Top 349%)
20K12.43 mi3.11 mi15539-2154891-1444891-14416055(Top 57%)5248(Top 43%)5248(Top 403%)
Half13.11 mi0.68 mi15585-464920-294920-2916403(Top 58%)5408(Top 44%)5408(Top 415%)
25K15.53 mi2.42 mi15822-2375067-1475067-14716856(Top 59%)5767(Top 47%)5767(Top 443%)
30K18.64 mi3.11 mi16033-2115243-1765243-17617067(Top 60%)6058(Top 50%)6058(Top 465%)
20M20.00 mi1.36 mi16048-155294-515294-5116482(Top 58%)5863(Top 48%)5863(Top 450%)
21M21.00 mi1.00 mi15973+755285+95285+915794(Top 56%)5597(Top 46%)5597(Top 430%)
35K21.75 mi0.75 mi15854+1195238+475238+4714210(Top 50%)4798(Top 39%)4798(Top 368%)
23M23.00 mi1.25 mi15750+1045224+145224+1415043(Top 53%)5355(Top 44%)5355(Top 411%)
24M24.00 mi1.00 mi15606+1445155+695155+6912274(Top 43%)3944(Top 32%)3944(Top 303%)
40K24.85 mi0.85 mi15433+1735088+675088+6711147(Top 39%)3492(Top 29%)3492(Top 268%)
25.2M25.20 mi0.35 mi15322+1115038+505038+508688(Top 31%)2401(Top 20%)2401(Top 184%)
Finish26.22 mi1.02 mi15298+245047-95047-915091(Top 53%)5528(Top 45%)5528(Top 424%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 53%
×21story building
+97ft-345ft

Overall

14915

Females

4542

F50-54

4542

5K→10K

3.1 - 6.2 mi

Top 53%
×5story building
+79ft-138ft

Overall

15129

Females

4617

F50-54

4617

10K→15K

6.2 - 9.3 mi

Top 53%
×3story building
+67ft-78ft

Overall

14915

Females

4542

F50-54

4542

15K→20K

9.3 - 12.4 mi

Top 57%
×5story building
+106ft-86ft

Overall

16055

Females

5248

F50-54

5248

20K→Half

12.4 - 13.1 mi

Top 58%
×2story building
+19ft-37ft

Overall

16403

Females

5408

F50-54

5408

Half→25K

13.1 - 15.5 mi

Top 59%
×4story building
+66ft-88ft

Overall

16856

Females

5767

F50-54

5767

25K→30K

15.5 - 18.6 mi

Top 60%
×9story building
+181ft-148ft

Overall

17067

Females

6058

F50-54

6058

30K→20M

18.6 - 20.0 mi

Top 58%
×5story building
+64ft-50ft

Overall

16482

Females

5863

F50-54

5863

20M→21M

20.0 - 21.0 mi

Top 56%
×8story building
+106ft-24ft

Overall

15794

Females

5597

F50-54

5597

21M→35K

21.0 - 21.8 mi

Top 50%
×7story building
+17ft-86ft

Overall

14210

Females

4798

F50-54

4798

35K→23M

21.8 - 23.0 mi

Top 53%
×5story building
+23ft-63ft

Overall

15043

Females

5355

F50-54

5355

23M→24M

23.0 - 24.0 mi

Top 43%
×6story building
+12ft-82ft

Overall

12274

Females

3944

F50-54

3944

24M→40K

24.0 - 24.9 mi

Top 39%
×1story
+6ft-20ft

Overall

11147

Females

3492

F50-54

3492

40K→25.2M

24.9 - 25.2 mi

Top 31%
×1story
+13ft-16ft

Overall

8688

Females

2401

F50-54

2401

25.2M→Finish

25.2 - 26.2 mi

Top 53%
×2story building
+22ft-21ft

Overall

15091

Females

5528

F50-54

5528

Passing Analysis

Category:
Athletes Passed
2510
Passed By
1647
Net Change
+863
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16161
5K → 10K688104+584#16161#15577
10K → 15K33077+253#15577#15324
15K → 20K145360-215#15324#15539
20K → Half2369-46#15539#15585
Half → 25K113350-237#15585#15822
25K → 30K160371-211#15822#16033
30K → 20M112127-15#16033#16048
20M → 21M13964+75#16048#15973
21M → 35K13314+119#15973#15854
35K → 23M15854+104#15854#15750
23M → 24M1506+144#15750#15606
24M → 40K1774+173#15606#15433
40K → 25.2M1110+111#15433#15322
25.2M → Finish7147+24#15322#15298
TOTALS25101647+863
📊

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