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BOSTON MARATHON 2025

Carolina Karlowicz

Bib: 17749•F

MA

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

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
8:41/mi
26:58
↑ 97↓ 3451.5%
10K· 6.21 mi
8:57/mi
54:45
↑ 79↓ 1380.4%
15K· 9.32 mi
9:00/mi
1:22:43
↑ 67↓ 78
20K· 12.43 mi
8:55/mi
1:50:25
↑ 106↓ 860.1%
Half· 13.11 mi
8:39/mi
1:56:19
↑ 19↓ 370.5%
25K· 15.53 mi
9:12/mi
2:18:37
↑ 66↓ 880.2%
30K· 18.64 mi
9:32/mi
2:48:13
↑ 181↓ 1480.2%
20M
9:35/mi
3:01:15
↑ 64↓ 500.2%
21M
10:30/mi
3:11:45
↑ 106↓ 241.6%
35K· 21.75 mi
9:20/mi
3:18:44
↑ 17↓ 861.7%
23M
9:25/mi
3:30:32
↑ 23↓ 630.6%
24M
8:52/mi
3:39:24
↓ 821.3%
40K· 24.85 mi
8:51/mi
3:46:58
↓ 200.3%
25.2M
9:49/mi
3:50:21
↑ 13↓ 160.2%
Finish· 26.22 mi
8:44/mi
3:59:15
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:56:19
Pace8:52 /mi
2nd Half
Distance13.11 mi
Time2:02:56
Pace9:23 /mi
📊Positive Split: 5.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:1026:588:4126:58
8:41
-
10K
6.21 mi11:44:5754:458:4927:47
8:57
+0:16
15K
9.32 mi12:12:551:22:438:5227:58
9:00
+0:03
20K
12.43 mi12:40:371:50:258:5327:42
8:55
-0:05
Half
13.11 mi12:46:311:56:198:525:54
8:39
-0:16
25K
15.53 mi13:08:492:18:378:5522:18
9:12
+0:33
30K
18.64 mi13:38:252:48:139:0129:36
9:32
+0:20
20M
20.00 mi13:51:273:01:159:0413:02
9:35
+0:03
21M
21.00 mi14:01:573:11:459:0810:30
10:30
+0:55
35K
21.75 mi14:08:563:18:449:086:59
9:20
-1:10
23M
23.00 mi14:20:443:30:329:0911:48
9:25
+0:05
24M
24.00 mi14:29:363:39:249:098:52
8:52
-0:33
40K
24.85 mi14:37:103:46:589:087:34
8:51
-0:01
25.2M
25.20 mi14:40:333:50:219:083:23
9:49
+0:58
Finish
26.22 mi14:49:273:59:159:088:54
8:44
-1:05

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

8:39 /mi

Average Pace

9:08 /mi

Slowest Pace

10:30 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

41:46

17% of race

Time at Steady Pace

2:02:11

51% of race

Time at Slower Pace

1:15:18

31% of race

Average Pace: 9:07 /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 mi11:17:1026:588:4126:58
8:41
#20925
10K
6.21 mi11:44:5754:458:4927:47
8:57
#21508
15K
9.32 mi12:12:551:22:438:5227:58
9:00
#21680
20K
12.43 mi12:40:371:50:258:5327:42
8:55
#21368
Half
13.11 mi12:46:311:56:198:525:54
8:39
#21285
25K
15.53 mi13:08:492:18:378:5522:18
9:12
#21222
30K
18.64 mi13:38:252:48:139:0129:36
9:32
#20988
20M
20.00 mi13:51:273:01:159:0413:02
9:35
#20867
21M
21.00 mi14:01:573:11:459:0810:30
10:30
#20792
35K
21.75 mi14:08:563:18:449:086:59
9:20
#20746
23M
23.00 mi14:20:443:30:329:0911:48
9:25
#20617
24M
24.00 mi14:29:363:39:249:098:52
8:52
#20477
40K
24.85 mi14:37:103:46:589:087:34
8:51
#20327
25.2M
25.20 mi14:40:333:50:219:083:23
9:49
#20274
Finish
26.22 mi14:49:273:59:159:088:54
8:44
#20210
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi209258035803522052(Top 78%)8583(Top 70%)8583(Top 157%)
10K6.21 mi3.10 mi21508-5838346-3118346-31122127(Top 78%)8669(Top 71%)8669(Top 159%)
15K9.32 mi3.11 mi21680-1728419-738419-7322052(Top 78%)8583(Top 70%)8583(Top 157%)
20K12.43 mi3.11 mi21368+3128238+1818238+18120563(Top 72%)7810(Top 64%)7810(Top 143%)
Half13.11 mi0.68 mi21285+838190+488190+4820105(Top 71%)7545(Top 62%)7545(Top 138%)
25K15.53 mi2.42 mi21222+638167+238167+2320759(Top 73%)7948(Top 65%)7948(Top 145%)
30K18.64 mi3.11 mi20988+2348084+838084+8320050(Top 71%)7684(Top 63%)7684(Top 141%)
20M20.00 mi1.36 mi20867+1218028+568028+5619588(Top 69%)7576(Top 62%)7576(Top 139%)
21M21.00 mi1.00 mi20792+758004+248004+2420029(Top 71%)7926(Top 65%)7926(Top 145%)
35K21.75 mi0.75 mi20746+468000+48000+419731(Top 69%)7839(Top 64%)7839(Top 143%)
23M23.00 mi1.25 mi20617+1297951+497951+4918367(Top 65%)7174(Top 59%)7174(Top 131%)
24M24.00 mi1.00 mi20477+1407889+627889+6216714(Top 59%)6339(Top 52%)6339(Top 116%)
40K24.85 mi0.85 mi20327+1507830+597830+5915513(Top 55%)5818(Top 48%)5818(Top 106%)
25.2M25.20 mi0.35 mi20274+537813+177813+1716244(Top 57%)6229(Top 51%)6229(Top 114%)
Finish26.22 mi1.02 mi20210+647786+277786+2717712(Top 62%)6937(Top 57%)6937(Top 127%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 78%
×21story building
+97ft-345ft

Overall

22052

Females

8583

F18-39

8583

5K→10K

3.1 - 6.2 mi

Top 78%
×5story building
+79ft-138ft

Overall

22127

Females

8669

F18-39

8669

10K→15K

6.2 - 9.3 mi

Top 78%
×3story building
+67ft-78ft

Overall

22052

Females

8583

F18-39

8583

15K→20K

9.3 - 12.4 mi

Top 72%
×5story building
+106ft-86ft

Overall

20563

Females

7810

F18-39

7810

20K→Half

12.4 - 13.1 mi

Top 71%
×2story building
+19ft-37ft

Overall

20105

Females

7545

F18-39

7545

Half→25K

13.1 - 15.5 mi

Top 73%
×4story building
+66ft-88ft

Overall

20759

Females

7948

F18-39

7948

25K→30K

15.5 - 18.6 mi

Top 71%
×9story building
+181ft-148ft

Overall

20050

Females

7684

F18-39

7684

30K→20M

18.6 - 20.0 mi

Top 69%
×5story building
+64ft-50ft

Overall

19588

Females

7576

F18-39

7576

20M→21M

20.0 - 21.0 mi

Top 71%
×8story building
+106ft-24ft

Overall

20029

Females

7926

F18-39

7926

21M→35K

21.0 - 21.8 mi

Top 69%
×7story building
+17ft-86ft

Overall

19731

Females

7839

F18-39

7839

35K→23M

21.8 - 23.0 mi

Top 65%
×5story building
+23ft-63ft

Overall

18367

Females

7174

F18-39

7174

23M→24M

23.0 - 24.0 mi

Top 59%
×6story building
+12ft-82ft

Overall

16714

Females

6339

F18-39

6339

24M→40K

24.0 - 24.9 mi

Top 55%
×1story
+6ft-20ft

Overall

15513

Females

5818

F18-39

5818

40K→25.2M

24.9 - 25.2 mi

Top 57%
×1story
+13ft-16ft

Overall

16244

Females

6229

F18-39

6229

25.2M→Finish

25.2 - 26.2 mi

Top 62%
×2story building
+22ft-21ft

Overall

17712

Females

6937

F18-39

6937

Passing Analysis

Category:
Athletes Passed
2188
Passed By
1473
Net Change
+715
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20925
5K → 10K104687-583#20925#21508
10K → 15K154326-172#21508#21680
15K → 20K37058+312#21680#21368
20K → Half9411+83#21368#21285
Half → 25K178115+63#21285#21222
25K → 30K31076+234#21222#20988
30K → 20M16342+121#20988#20867
20M → 21M12954+75#20867#20792
21M → 35K7327+46#20792#20746
35K → 23M15627+129#20746#20617
23M → 24M1444+140#20617#20477
24M → 40K1566+150#20477#20327
40K → 25.2M618+53#20327#20274
25.2M → Finish9632+64#20274#20210
TOTALS21881473+715
📊

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