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BOSTON MARATHON 2025

Karen Narita

Bib: 22957•F

NC

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F45-49)
#0 / 1813
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:46
Rank: #22165
Start → 5K
27:46 | 8:56/mi
10K· 6.21 mi
55:48
Rank: #22354 (-189)
5K → 10K
28:02 | 9:01/mi
15K· 9.32 mi
1:24:43
Rank: #22652 (-298)
10K → 15K
28:55 | 9:18/mi
20K· 12.43 mi
1:53:18
Rank: #22434 (+218)
15K → 20K
28:35 | 9:12/mi
Half· 13.11 mi
1:59:25
Rank: #22378 (+56)
20K → Half
6:07 | 8:58/mi
25K· 15.53 mi
2:22:13
Rank: #22265 (+113)
Half → 25K
22:48 | 9:24/mi
30K· 18.64 mi
2:51:51
Rank: #21845 (+420)
25K → 30K
29:38 | 9:32/mi
20M
3:04:41
Rank: #21607 (+238)
30K → 20M
12:50 | 9:27/mi
21M
3:14:42
Rank: #21409 (+198)
20M → 21M
10:01 | 10:01/mi
35K· 21.75 mi
3:21:31
Rank: #21319 (+90)
21M → 35K
6:49 | 9:07/mi
23M
3:32:49
Rank: #21039 (+280)
35K → 23M
11:18 | 9:02/mi
24M
3:41:34
Rank: #20875 (+164)
23M → 24M
8:45 | 8:45/mi
40K· 24.85 mi
3:49:08
Rank: #20692 (+183)
24M → 40K
7:34 | 8:51/mi
25.2M
3:52:31
Rank: #20639 (+53)
40K → 25.2M
3:23 | 9:49/mi
Finish· 26.22 mi
4:01:29
Rank: #20565 (+74)
25.2M → Finish
8:58 | 8:48/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:59:25
Pace9:07 /mi
2nd Half
Distance13.11 mi
Time2:02:04
Pace9:19 /mi
📊Positive Split: 2.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:26:4927:468:5627:46
8:56
-
10K
6.21 mi11:54:5155:488:5928:02
9:01
+0:05
15K
9.32 mi12:23:461:24:439:0528:55
9:18
+0:17
20K
12.43 mi12:52:211:53:189:0728:35
9:12
-0:06
Half
13.11 mi12:58:281:59:259:076:07
8:58
-0:14
25K
15.53 mi13:21:162:22:139:0922:48
9:24
+0:26
30K
18.64 mi13:50:542:51:519:1329:38
9:32
+0:08
20M
20.00 mi14:03:443:04:419:1412:50
9:27
-0:05
21M
21.00 mi14:13:453:14:429:1610:01
10:01
+0:34
35K
21.75 mi14:20:343:21:319:166:49
9:07
-0:54
23M
23.00 mi14:31:523:32:499:1511:18
9:02
-0:05
24M
24.00 mi14:40:373:41:349:148:45
8:45
-0:17
40K
24.85 mi14:48:113:49:089:137:34
8:51
+0:06
25.2M
25.20 mi14:51:343:52:319:143:23
9:49
+0:58
Finish
26.22 mi15:00:324:01:299:138:58
8:48
-1:01

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

8:45 /mi

Average Pace

9:13 /mi

Slowest Pace

10:01 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:48:05

94% of race

Time at Steady Pace

13:24

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:13 /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 mi11:26:4927:468:5627:46
8:56
#22165
10K
6.21 mi11:54:5155:488:5928:02
9:01
#22354
15K
9.32 mi12:23:461:24:439:0528:55
9:18
#22652
20K
12.43 mi12:52:211:53:189:0728:35
9:12
#22434
Half
13.11 mi12:58:281:59:259:076:07
8:58
#22378
25K
15.53 mi13:21:162:22:139:0922:48
9:24
#22265
30K
18.64 mi13:50:542:51:519:1329:38
9:32
#21845
20M
20.00 mi14:03:443:04:419:1412:50
9:27
#21607
21M
21.00 mi14:13:453:14:429:1610:01
10:01
#21409
35K
21.75 mi14:20:343:21:319:166:49
9:07
#21319
23M
23.00 mi14:31:523:32:499:1511:18
9:02
#21039
24M
24.00 mi14:40:373:41:349:148:45
8:45
#20875
40K
24.85 mi14:48:113:49:089:137:34
8:51
#20692
25.2M
25.20 mi14:51:343:52:319:143:23
9:49
#20639
Finish
26.22 mi15:00:324:01:299:138:58
8:48
#20565
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi221658714871423237(Top 82%)9226(Top 75%)9226(Top 509%)
10K6.21 mi3.10 mi22354-1898809-958809-9522485(Top 79%)8854(Top 72%)8854(Top 488%)
15K9.32 mi3.11 mi22652-2988937-1288937-12823237(Top 82%)9226(Top 75%)9226(Top 509%)
20K12.43 mi3.11 mi22434+2188832+1058832+10521896(Top 77%)8531(Top 70%)8531(Top 471%)
Half13.11 mi0.68 mi22378+568809+238809+2321696(Top 76%)8415(Top 69%)8415(Top 464%)
25K15.53 mi2.42 mi22265+1138746+638746+6321552(Top 76%)8393(Top 69%)8393(Top 463%)
30K18.64 mi3.11 mi21845+4208534+2128534+21220098(Top 71%)7711(Top 63%)7711(Top 425%)
20M20.00 mi1.36 mi21607+2388422+1128422+11218935(Top 67%)7234(Top 59%)7234(Top 399%)
21M21.00 mi1.00 mi21409+1988342+808342+8018389(Top 65%)7007(Top 57%)7007(Top 386%)
35K21.75 mi0.75 mi21319+908301+418301+4118810(Top 66%)7361(Top 60%)7361(Top 406%)
23M23.00 mi1.25 mi21039+2808182+1198182+11916441(Top 58%)6146(Top 50%)6146(Top 339%)
24M24.00 mi1.00 mi20875+1648114+688114+6816076(Top 57%)5985(Top 49%)5985(Top 330%)
40K24.85 mi0.85 mi20692+1838024+908024+9015517(Top 55%)5822(Top 48%)5822(Top 321%)
25.2M25.20 mi0.35 mi20639+538006+188006+1816249(Top 57%)6234(Top 51%)6234(Top 344%)
Finish26.22 mi1.02 mi20565+747976+307976+3018080(Top 64%)7137(Top 58%)7137(Top 394%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 82%
×21stories
+97ft-345ft

Overall

23237

Females

9226

F45-49

9226

5K→10K

3.1 - 6.2 mi

Top 79%
×5stories
+79ft-138ft

Overall

22485

Females

8854

F45-49

8854

10K→15K

6.2 - 9.3 mi

Top 82%
×3stories
+67ft-78ft

Overall

23237

Females

9226

F45-49

9226

15K→20K

9.3 - 12.4 mi

Top 77%
×5stories
+106ft-86ft

Overall

21896

Females

8531

F45-49

8531

20K→Half

12.4 - 13.1 mi

Top 76%
×2stories
+19ft-37ft

Overall

21696

Females

8415

F45-49

8415

Half→25K

13.1 - 15.5 mi

Top 76%
×4stories
+66ft-88ft

Overall

21552

Females

8393

F45-49

8393

25K→30K

15.5 - 18.6 mi

Top 71%
×9stories
+181ft-148ft

Overall

20098

Females

7711

F45-49

7711

30K→20M

18.6 - 20.0 mi

Top 67%
×5stories
+64ft-50ft

Overall

18935

Females

7234

F45-49

7234

20M→21M

20.0 - 21.0 mi

Top 65%
×8stories
+106ft-24ft

Overall

18389

Females

7007

F45-49

7007

21M→35K

21.0 - 21.8 mi

Top 66%
×7stories
+17ft-86ft

Overall

18810

Females

7361

F45-49

7361

35K→23M

21.8 - 23.0 mi

Top 58%
×5stories
+23ft-63ft

Overall

16441

Females

6146

F45-49

6146

23M→24M

23.0 - 24.0 mi

Top 57%
×6stories
+12ft-82ft

Overall

16076

Females

5985

F45-49

5985

24M→40K

24.0 - 24.9 mi

Top 55%
×1story
+6ft-20ft

Overall

15517

Females

5822

F45-49

5822

40K→25.2M

24.9 - 25.2 mi

Top 57%
×1story
+13ft-16ft

Overall

16249

Females

6234

F45-49

6234

25.2M→Finish

25.2 - 26.2 mi

Top 64%
×2stories
+22ft-21ft

Overall

18080

Females

7137

F45-49

7137

Passing Analysis

Category:
Athletes Passed
2592
Passed By
992
Net Change
+1600
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22165
5K → 10K179368-189#22165#22354
10K → 15K97395-298#22354#22652
15K → 20K27961+218#22652#22434
20K → Half6711+56#22434#22378
Half → 25K19380+113#22378#22265
25K → 30K45030+420#22265#21845
30K → 20M2479+238#21845#21607
20M → 21M20810+198#21607#21409
21M → 35K977+90#21409#21319
35K → 23M2855+280#21319#21039
23M → 24M1706+164#21039#20875
24M → 40K1841+183#20875#20692
40K → 25.2M530+53#20692#20639
25.2M → Finish839+74#20639#20565
TOTALS2592992+1600
📊

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