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BOSTON MARATHON 2025

Sarah Karpinski

Bib: 10379•F

DC

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 41%
Gender (Female)
#0 / 12228
Top 25%
Masters (Masters Women)
#0 / 6759
Top 11%
Division (F40-44)
#0 / 1718
Top 23%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:18
Rank: #9299
Start → 5K
7:11/mi
22:18 split
10K· 6.21 mi
44:06
Rank: #8632 (+667)
5K → 10K
7:01/mi
21:48 split
15K· 9.32 mi
1:06:28
Rank: #8759 (-127)
10K → 15K
7:12/mi
22:22 split
20K· 12.43 mi
1:29:27
Rank: #8974 (-215)
15K → 20K
7:24/mi
22:59 split
Half· 13.11 mi
1:34:35
Rank: #9133 (-159)
20K → Half
7:31/mi
5:08 split
25K· 15.53 mi
1:53:25
Rank: #9589 (-456)
Half → 25K
7:46/mi
18:50 split
30K· 18.64 mi
2:19:34
Rank: #10473 (-884)
25K → 30K
8:25/mi
26:09 split
20M
2:31:06
Rank: #10744 (-271)
30K → 20M
8:29/mi
11:32 split
21M
2:39:50
Rank: #10762 (-18)
20M → 21M
8:44/mi
8:44 split
35K· 21.75 mi
2:46:05
Rank: #10899 (-137)
21M → 35K
8:21/mi
6:15 split
23M
2:56:46
Rank: #11025 (-126)
35K → 23M
8:32/mi
10:41 split
24M
3:05:21
Rank: #11187 (-162)
23M → 24M
8:35/mi
8:35 split
40K· 24.85 mi
3:12:55
Rank: #11367 (-180)
24M → 40K
8:51/mi
7:34 split
25.2M
3:16:11
Rank: #11407 (-40)
40K → 25.2M
9:28/mi
3:16 split
Finish· 26.22 mi
3:24:33
Rank: #11525 (-118)
25.2M → Finish
8:13/mi
8:22 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:34:35
Pace7:13 /mi
2nd Half
Distance13.11 mi
Time1:49:58
Pace8:23 /mi
📊Positive Split: 16.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:5622:187:1122:18
7:11
-
10K
6.21 mi11:11:4444:067:0621:48
7:01
-0:10
15K
9.32 mi11:34:061:06:287:0822:22
7:12
+0:11
20K
12.43 mi11:57:051:29:277:1222:59
7:24
+0:12
Half
13.11 mi12:02:131:34:357:135:08
7:31
+0:07
25K
15.53 mi12:21:031:53:257:1818:50
7:46
+0:15
30K
18.64 mi12:47:122:19:347:2926:09
8:25
+0:39
20M
20.00 mi12:58:442:31:067:3311:32
8:29
+0:04
21M
21.00 mi13:07:282:39:507:378:44
8:44
+0:15
35K
21.75 mi13:13:432:46:057:386:15
8:21
-0:23
23M
23.00 mi13:24:242:56:467:4110:41
8:32
+0:11
24M
24.00 mi13:32:593:05:217:438:35
8:35
+0:03
40K
24.85 mi13:40:333:12:557:467:34
8:51
+0:16
25.2M
25.20 mi13:43:493:16:117:473:16
9:28
+0:37
Finish
26.22 mi13:52:113:24:337:488:22
8:13
-1:15

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

7:01 /mi

Average Pace

7:48 /mi

Slowest Pace

9:28 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:53:25

55% of race

Time at Steady Pace

1:11:34

35% of race

Time at Slower Pace

19:34

10% of race

Average Pace: 7:48 /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 mi10:49:5622:187:1122:18
7:11
#9299
10K
6.21 mi11:11:4444:067:0621:48
7:01
#8632
15K
9.32 mi11:34:061:06:287:0822:22
7:12
#8759
20K
12.43 mi11:57:051:29:277:1222:59
7:24
#8974
Half
13.11 mi12:02:131:34:357:135:08
7:31
#9133
25K
15.53 mi12:21:031:53:257:1818:50
7:46
#9589
30K
18.64 mi12:47:122:19:347:2926:09
8:25
#10473
20M
20.00 mi12:58:442:31:067:3311:32
8:29
#10744
21M
21.00 mi13:07:282:39:507:378:44
8:44
#10762
35K
21.75 mi13:13:432:46:057:386:15
8:21
#10899
23M
23.00 mi13:24:242:56:467:4110:41
8:32
#11025
24M
24.00 mi13:32:593:05:217:438:35
8:35
#11187
40K
24.85 mi13:40:333:12:557:467:34
8:51
#11367
25.2M
25.20 mi13:43:493:16:117:473:16
9:28
#11407
Finish
26.22 mi13:52:113:24:337:488:22
8:13
#11525
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi9299151315139138(Top 32%)1491(Top 12%)1491(Top 87%)
10K6.21 mi3.10 mi8632+6671235+2781235+2788053(Top 28%)1032(Top 8%)1032(Top 60%)
15K9.32 mi3.11 mi8759-1271300-651300-659138(Top 32%)1491(Top 12%)1491(Top 87%)
20K12.43 mi3.11 mi8974-2151407-1071407-1079910(Top 35%)1920(Top 16%)1920(Top 112%)
Half13.11 mi0.68 mi9133-1591474-671474-6711992(Top 42%)2942(Top 24%)2942(Top 171%)
25K15.53 mi2.42 mi9589-4561721-2471721-24712091(Top 43%)3162(Top 26%)3162(Top 184%)
30K18.64 mi3.11 mi10473-8842192-4712192-47114239(Top 50%)4498(Top 37%)4498(Top 262%)
20M20.00 mi1.36 mi10744-2712382-1902382-19013702(Top 48%)4351(Top 36%)4351(Top 253%)
21M21.00 mi1.00 mi10762-182428-462428-4611900(Top 42%)3537(Top 29%)3537(Top 206%)
35K21.75 mi0.75 mi10899-1372523-952523-9514606(Top 51%)5009(Top 41%)5009(Top 292%)
23M23.00 mi1.25 mi11025-1262629-1062629-10613526(Top 48%)4532(Top 37%)4532(Top 264%)
24M24.00 mi1.00 mi11187-1622753-1242753-12415054(Top 53%)5395(Top 44%)5395(Top 314%)
40K24.85 mi0.85 mi11367-1802887-1342887-13415471(Top 54%)5776(Top 47%)5776(Top 336%)
25.2M25.20 mi0.35 mi11407-402927-402927-4014451(Top 51%)5240(Top 43%)5240(Top 305%)
Finish26.22 mi1.02 mi11525-1183020-933020-9314341(Top 50%)5114(Top 42%)5114(Top 298%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 32%
×21story building
+97ft-345ft

Overall

9138

Females

1491

F40-44

1491

5K→10K

3.1 - 6.2 mi

Top 28%
×5story building
+79ft-138ft

Overall

8053

Females

1032

F40-44

1032

10K→15K

6.2 - 9.3 mi

Top 32%
×3story building
+67ft-78ft

Overall

9138

Females

1491

F40-44

1491

15K→20K

9.3 - 12.4 mi

Top 35%
×5story building
+106ft-86ft

Overall

9910

Females

1920

F40-44

1920

20K→Half

12.4 - 13.1 mi

Top 42%
×2story building
+19ft-37ft

Overall

11992

Females

2942

F40-44

2942

Half→25K

13.1 - 15.5 mi

Top 43%
×4story building
+66ft-88ft

Overall

12091

Females

3162

F40-44

3162

25K→30K

15.5 - 18.6 mi

Top 50%
×9story building
+181ft-148ft

Overall

14239

Females

4498

F40-44

4498

30K→20M

18.6 - 20.0 mi

Top 48%
×5story building
+64ft-50ft

Overall

13702

Females

4351

F40-44

4351

20M→21M

20.0 - 21.0 mi

Top 42%
×8story building
+106ft-24ft

Overall

11900

Females

3537

F40-44

3537

21M→35K

21.0 - 21.8 mi

Top 51%
×7story building
+17ft-86ft

Overall

14606

Females

5009

F40-44

5009

35K→23M

21.8 - 23.0 mi

Top 48%
×5story building
+23ft-63ft

Overall

13526

Females

4532

F40-44

4532

23M→24M

23.0 - 24.0 mi

Top 53%
×6story building
+12ft-82ft

Overall

15054

Females

5395

F40-44

5395

24M→40K

24.0 - 24.9 mi

Top 54%
×1story
+6ft-20ft

Overall

15471

Females

5776

F40-44

5776

40K→25.2M

24.9 - 25.2 mi

Top 51%
×1story
+13ft-16ft

Overall

14451

Females

5240

F40-44

5240

25.2M→Finish

25.2 - 26.2 mi

Top 50%
×2story building
+22ft-21ft

Overall

14341

Females

5114

F40-44

5114

Passing Analysis

Category:
Athletes Passed
1459
Passed By
3683
Net Change
-2226
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9299
5K → 10K70538+667#9299#8632
10K → 15K119246-127#8632#8759
15K → 20K112327-215#8759#8974
20K → Half4163-159#8974#9133
Half → 25K69525-456#9133#9589
25K → 30K64946-884#9589#10473
30K → 20M53324-271#10473#10744
20M → 21M92110-18#10744#10762
21M → 35K28165-137#10762#10899
35K → 23M69195-126#10899#11025
23M → 24M44206-162#11025#11187
24M → 40K29209-180#11187#11367
40K → 25.2M3171-40#11367#11407
25.2M → Finish40158-118#11407#11525
TOTALS14593683-2226
📊

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