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BOSTON MARATHON 2025

Kara Norton

Bib: 15760•F

NY

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Division (F18-39)
#0 / 5469
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:49
Rank: #22219
Start → 5K
27:49 | 8:57/mi
10K· 6.21 mi
56:17
Rank: #22660 (-441)
5K → 10K
28:28 | 9:10/mi
15K· 9.32 mi
1:24:53
Rank: #22724 (-64)
10K → 15K
28:36 | 9:12/mi
20K· 12.43 mi
1:52:21
Rank: #22106 (+618)
15K → 20K
27:28 | 8:50/mi
Half· 13.11 mi
1:58:22
Rank: #22050 (+56)
20K → Half
6:01 | 8:49/mi
25K· 15.53 mi
2:19:48
Rank: #21545 (+505)
Half → 25K
21:26 | 8:50/mi
30K· 18.64 mi
2:47:35
Rank: #20817 (+728)
25K → 30K
27:47 | 8:57/mi
20M
2:59:28
Rank: #20432 (+385)
30K → 20M
11:53 | 8:45/mi
21M
3:07:48
Rank: #19917 (+515)
20M → 21M
8:20 | 8:20/mi
35K· 21.75 mi
3:13:49
Rank: #19692 (+225)
21M → 35K
6:01 | 8:03/mi
23M
3:23:50
Rank: #19202 (+490)
35K → 23M
10:01 | 8:00/mi
24M
3:31:45
Rank: #18895 (+307)
23M → 24M
7:55 | 7:55/mi
40K· 24.85 mi
3:38:33
Rank: #18572 (+323)
24M → 40K
6:48 | 7:57/mi
25.2M
3:41:21
Rank: #18388 (+184)
40K → 25.2M
2:48 | 8:07/mi
Finish· 26.22 mi
3:48:44
Rank: #18030 (+358)
25.2M → Finish
7:23 | 7:15/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:58:22
Pace9:02 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:50:22
Pace8:25 /mi
📊Negative Split: 6.8% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:59:1927:498:5727:49
8:57
-
10K
6.21 mi11:27:4756:179:0328:28
9:10
+0:13
15K
9.32 mi11:56:231:24:539:0628:36
9:12
+0:02
20K
12.43 mi12:23:511:52:219:0227:28
8:50
-0:22
Half
13.11 mi12:29:521:58:229:026:01
8:49
-0:01
25K
15.53 mi12:51:182:19:489:0021:26
8:50
+0:01
30K
18.64 mi13:19:052:47:358:5927:47
8:57
+0:07
20M
20.00 mi13:30:582:59:288:5811:53
8:45
-0:12
21M
21.00 mi13:39:183:07:488:578:20
8:20
-0:25
35K
21.75 mi13:45:193:13:498:556:01
8:03
-0:17
23M
23.00 mi13:55:203:23:508:5210:01
8:00
-0:03
24M
24.00 mi14:03:153:31:458:497:55
7:55
-0:05
40K
24.85 mi14:10:033:38:338:486:48
7:57
+0:02
25.2M
25.20 mi14:12:513:41:218:472:48
8:07
+0:10
Finish
26.22 mi14:20:143:48:448:447:23
7:15
-0:52

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

7:15 /mi

Average Pace

8:44 /mi

Slowest Pace

9:12 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

49:16

22% of race

Time at Steady Pace

2:02:24

54% of race

Time at Slower Pace

57:04

25% of race

Average Pace: 8:43 /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 mi10:59:1927:498:5727:49
8:57
#22219
10K
6.21 mi11:27:4756:179:0328:28
9:10
#22660
15K
9.32 mi11:56:231:24:539:0628:36
9:12
#22724
20K
12.43 mi12:23:511:52:219:0227:28
8:50
#22106
Half
13.11 mi12:29:521:58:229:026:01
8:49
#22050
25K
15.53 mi12:51:182:19:489:0021:26
8:50
#21545
30K
18.64 mi13:19:052:47:358:5927:47
8:57
#20817
20M
20.00 mi13:30:582:59:288:5811:53
8:45
#20432
21M
21.00 mi13:39:183:07:488:578:20
8:20
#19917
35K
21.75 mi13:45:193:13:498:556:01
8:03
#19692
23M
23.00 mi13:55:203:23:508:5210:01
8:00
#19202
24M
24.00 mi14:03:153:31:458:497:55
7:55
#18895
40K
24.85 mi14:10:033:38:338:486:48
7:57
#18572
25.2M
25.20 mi14:12:513:41:218:472:48
8:07
#18388
Finish
26.22 mi14:20:143:48:448:447:23
7:15
#18030
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi222198747874722879(Top 81%)9034(Top 74%)9034(Top 165%)
10K6.21 mi3.10 mi22660-4418965-2188965-21823054(Top 81%)9161(Top 75%)9161(Top 168%)
15K9.32 mi3.11 mi22724-648971-68971-622879(Top 81%)9034(Top 74%)9034(Top 165%)
20K12.43 mi3.11 mi22106+6188655+3168655+31620160(Top 71%)7568(Top 62%)7568(Top 138%)
Half13.11 mi0.68 mi22050+568627+288627+2820999(Top 74%)8032(Top 66%)8032(Top 147%)
25K15.53 mi2.42 mi21545+5058349+2788349+27819157(Top 67%)7052(Top 58%)7052(Top 129%)
30K18.64 mi3.11 mi20817+7287995+3547995+35417389(Top 61%)6242(Top 51%)6242(Top 114%)
20M20.00 mi1.36 mi20432+3857798+1977798+19715385(Top 54%)5264(Top 43%)5264(Top 96%)
21M21.00 mi1.00 mi19917+5157523+2757523+2759483(Top 33%)2379(Top 19%)2379(Top 43%)
35K21.75 mi0.75 mi19692+2257409+1147409+11412612(Top 44%)3975(Top 33%)3975(Top 73%)
23M23.00 mi1.25 mi19202+4907164+2457164+24510076(Top 35%)2788(Top 23%)2788(Top 51%)
24M24.00 mi1.00 mi18895+3077016+1487016+14810722(Top 38%)3163(Top 26%)3163(Top 58%)
40K24.85 mi0.85 mi18572+3236860+1566860+1569934(Top 35%)2914(Top 24%)2914(Top 53%)
25.2M25.20 mi0.35 mi18388+1846768+926768+926726(Top 24%)1554(Top 13%)1554(Top 28%)
Finish26.22 mi1.02 mi18030+3586588+1806588+1807423(Top 26%)1843(Top 15%)1843(Top 34%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 81%
×21stories
+97ft-345ft

Overall

22879

Females

9034

F18-39

9034

5K→10K

3.1 - 6.2 mi

Top 81%
×5stories
+79ft-138ft

Overall

23054

Females

9161

F18-39

9161

10K→15K

6.2 - 9.3 mi

Top 81%
×3stories
+67ft-78ft

Overall

22879

Females

9034

F18-39

9034

15K→20K

9.3 - 12.4 mi

Top 71%
×5stories
+106ft-86ft

Overall

20160

Females

7568

F18-39

7568

20K→Half

12.4 - 13.1 mi

Top 74%
×2stories
+19ft-37ft

Overall

20999

Females

8032

F18-39

8032

Half→25K

13.1 - 15.5 mi

Top 67%
×4stories
+66ft-88ft

Overall

19157

Females

7052

F18-39

7052

25K→30K

15.5 - 18.6 mi

Top 61%
×9stories
+181ft-148ft

Overall

17389

Females

6242

F18-39

6242

30K→20M

18.6 - 20.0 mi

Top 54%
×5stories
+64ft-50ft

Overall

15385

Females

5264

F18-39

5264

20M→21M

20.0 - 21.0 mi

Top 33%
×8stories
+106ft-24ft

Overall

9483

Females

2379

F18-39

2379

21M→35K

21.0 - 21.8 mi

Top 44%
×7stories
+17ft-86ft

Overall

12612

Females

3975

F18-39

3975

35K→23M

21.8 - 23.0 mi

Top 35%
×5stories
+23ft-63ft

Overall

10076

Females

2788

F18-39

2788

23M→24M

23.0 - 24.0 mi

Top 38%
×6stories
+12ft-82ft

Overall

10722

Females

3163

F18-39

3163

24M→40K

24.0 - 24.9 mi

Top 35%
×1story
+6ft-20ft

Overall

9934

Females

2914

F18-39

2914

40K→25.2M

24.9 - 25.2 mi

Top 24%
×1story
+13ft-16ft

Overall

6726

Females

1554

F18-39

1554

25.2M→Finish

25.2 - 26.2 mi

Top 26%
×2stories
+22ft-21ft

Overall

7423

Females

1843

F18-39

1843

Passing Analysis

Category:
Athletes Passed
4985
Passed By
796
Net Change
+4189
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22219
5K → 10K113554-441#22219#22660
10K → 15K159223-64#22660#22724
15K → 20K6213+618#22724#22106
20K → Half615+56#22106#22050
Half → 25K5105+505#22050#21545
25K → 30K7335+728#21545#20817
30K → 20M3850+385#20817#20432
20M → 21M5150+515#20432#19917
21M → 35K2250+225#19917#19692
35K → 23M4900+490#19692#19202
23M → 24M3070+307#19202#18895
24M → 40K3241+323#18895#18572
40K → 25.2M1840+184#18572#18388
25.2M → Finish3580+358#18388#18030
TOTALS4985796+4189
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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