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BOSTON MARATHON 2025

Jill Karrenbrock

Bib: 14539•F

CA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 36%
Gender (Female)
#0 / 12228
Top 19%
Division (F18-39)
#0 / 5469
Top 34%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:09
Rank: #11809
Start → 5K
23:09 | 7:27/mi
10K· 6.21 mi
46:20
Rank: #11758 (+51)
5K → 10K
23:11 | 7:28/mi
15K· 9.32 mi
1:09:27
Rank: #11549 (+209)
10K → 15K
23:07 | 7:26/mi
20K· 12.43 mi
1:32:47
Rank: #11368 (+181)
15K → 20K
23:20 | 7:31/mi
Half· 13.11 mi
1:37:52
Rank: #11363 (+5)
20K → Half
5:05 | 7:27/mi
25K· 15.53 mi
1:56:14
Rank: #11192 (+171)
Half → 25K
18:22 | 7:35/mi
30K· 18.64 mi
2:21:06
Rank: #11194 (-2)
25K → 30K
24:52 | 8:00/mi
20M
2:31:48
Rank: #11001 (+193)
30K → 20M
10:42 | 7:52/mi
21M
2:40:03
Rank: #10850 (+151)
20M → 21M
8:15 | 8:15/mi
35K· 21.75 mi
2:45:35
Rank: #10713 (+137)
21M → 35K
5:32 | 7:24/mi
23M
2:55:25
Rank: #10574 (+139)
35K → 23M
9:50 | 7:51/mi
24M
3:03:01
Rank: #10444 (+130)
23M → 24M
7:36 | 7:36/mi
40K· 24.85 mi
3:09:38
Rank: #10311 (+133)
24M → 40K
6:37 | 7:44/mi
25.2M
3:12:35
Rank: #10295 (+16)
40K → 25.2M
2:57 | 8:33/mi
Finish· 26.22 mi
3:20:21
Rank: #10249 (+46)
25.2M → Finish
7:46 | 7:37/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:37:52
Pace7:28 /mi
2nd Half
Distance13.11 mi
Time1:42:29
Pace7:49 /mi
📊Positive Split: 4.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:53:0123:097:2723:09
7:27
-
10K
6.21 mi11:16:1246:207:2723:11
7:28
+0:01
15K
9.32 mi11:39:191:09:277:2723:07
7:26
-0:02
20K
12.43 mi12:02:391:32:477:2823:20
7:31
+0:05
Half
13.11 mi12:07:441:37:527:285:05
7:27
-0:04
25K
15.53 mi12:26:061:56:147:2918:22
7:35
+0:08
30K
18.64 mi12:50:582:21:067:3424:52
8:00
+0:25
20M
20.00 mi13:01:402:31:487:3510:42
7:52
-0:08
21M
21.00 mi13:09:552:40:037:378:15
8:15
+0:23
35K
21.75 mi13:15:272:45:357:375:32
7:24
-0:51
23M
23.00 mi13:25:172:55:257:389:50
7:51
+0:27
24M
24.00 mi13:32:533:03:017:387:36
7:36
-0:15
40K
24.85 mi13:39:303:09:387:386:37
7:44
+0:08
25.2M
25.20 mi13:42:273:12:357:392:57
8:33
+0:49
Finish
26.22 mi13:50:133:20:217:397:46
7:37
-0:56

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

7:24 /mi

Average Pace

7:39 /mi

Slowest Pace

8:33 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:09:09

94% of race

Time at Steady Pace

11:12

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:38 /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 mi10:53:0123:097:2723:09
7:27
#11809
10K
6.21 mi11:16:1246:207:2723:11
7:28
#11758
15K
9.32 mi11:39:191:09:277:2723:07
7:26
#11549
20K
12.43 mi12:02:391:32:477:2823:20
7:31
#11368
Half
13.11 mi12:07:441:37:527:285:05
7:27
#11363
25K
15.53 mi12:26:061:56:147:2918:22
7:35
#11192
30K
18.64 mi12:50:582:21:067:3424:52
8:00
#11194
20M
20.00 mi13:01:402:31:487:3510:42
7:52
#11001
21M
21.00 mi13:09:552:40:037:378:15
8:15
#10850
35K
21.75 mi13:15:272:45:357:375:32
7:24
#10713
23M
23.00 mi13:25:172:55:257:389:50
7:51
#10574
24M
24.00 mi13:32:533:03:017:387:36
7:36
#10444
40K
24.85 mi13:39:303:09:387:386:37
7:44
#10311
25.2M
25.20 mi13:42:273:12:357:392:57
8:33
#10295
Finish
26.22 mi13:50:133:20:217:397:46
7:37
#10249
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi118092690269011256(Top 40%)2505(Top 20%)2505(Top 46%)
10K6.21 mi3.10 mi11758+512679+112679+1111741(Top 41%)2683(Top 22%)2683(Top 49%)
15K9.32 mi3.11 mi11549+2092602+772602+7711256(Top 40%)2505(Top 20%)2505(Top 46%)
20K12.43 mi3.11 mi11368+1812537+652537+6510862(Top 38%)2401(Top 20%)2401(Top 44%)
Half13.11 mi0.68 mi11363+52535+22535+211364(Top 40%)2609(Top 21%)2609(Top 48%)
25K15.53 mi2.42 mi11192+1712487+482487+4810571(Top 37%)2362(Top 19%)2362(Top 43%)
30K18.64 mi3.11 mi11194-22566-792566-7911408(Top 40%)2978(Top 24%)2978(Top 54%)
20M20.00 mi1.36 mi11001+1932513+532513+539558(Top 34%)2247(Top 18%)2247(Top 41%)
21M21.00 mi1.00 mi10850+1512474+392474+398936(Top 31%)2141(Top 18%)2141(Top 39%)
35K21.75 mi0.75 mi10713+1372416+582416+587960(Top 28%)1677(Top 14%)1677(Top 31%)
23M23.00 mi1.25 mi10574+1392385+312385+318982(Top 32%)2248(Top 18%)2248(Top 41%)
24M24.00 mi1.00 mi10444+1302356+292356+298433(Top 30%)2065(Top 17%)2065(Top 38%)
40K24.85 mi0.85 mi10311+1332330+262330+268395(Top 30%)2178(Top 18%)2178(Top 40%)
25.2M25.20 mi0.35 mi10295+162343-132343-139165(Top 32%)2602(Top 21%)2602(Top 48%)
Finish26.22 mi1.02 mi10249+462352-92352-910122(Top 36%)3042(Top 25%)3042(Top 56%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 40%
×21stories
+97ft-345ft

Overall

11256

Females

2505

F18-39

2505

5K→10K

3.1 - 6.2 mi

Top 41%
×5stories
+79ft-138ft

Overall

11741

Females

2683

F18-39

2683

10K→15K

6.2 - 9.3 mi

Top 40%
×3stories
+67ft-78ft

Overall

11256

Females

2505

F18-39

2505

15K→20K

9.3 - 12.4 mi

Top 38%
×5stories
+106ft-86ft

Overall

10862

Females

2401

F18-39

2401

20K→Half

12.4 - 13.1 mi

Top 40%
×2stories
+19ft-37ft

Overall

11364

Females

2609

F18-39

2609

Half→25K

13.1 - 15.5 mi

Top 37%
×4stories
+66ft-88ft

Overall

10571

Females

2362

F18-39

2362

25K→30K

15.5 - 18.6 mi

Top 40%
×9stories
+181ft-148ft

Overall

11408

Females

2978

F18-39

2978

30K→20M

18.6 - 20.0 mi

Top 34%
×5stories
+64ft-50ft

Overall

9558

Females

2247

F18-39

2247

20M→21M

20.0 - 21.0 mi

Top 31%
×8stories
+106ft-24ft

Overall

8936

Females

2141

F18-39

2141

21M→35K

21.0 - 21.8 mi

Top 28%
×7stories
+17ft-86ft

Overall

7960

Females

1677

F18-39

1677

35K→23M

21.8 - 23.0 mi

Top 32%
×5stories
+23ft-63ft

Overall

8982

Females

2248

F18-39

2248

23M→24M

23.0 - 24.0 mi

Top 30%
×6stories
+12ft-82ft

Overall

8433

Females

2065

F18-39

2065

24M→40K

24.0 - 24.9 mi

Top 30%
×1story
+6ft-20ft

Overall

8395

Females

2178

F18-39

2178

40K→25.2M

24.9 - 25.2 mi

Top 32%
×1story
+13ft-16ft

Overall

9165

Females

2602

F18-39

2602

25.2M→Finish

25.2 - 26.2 mi

Top 36%
×2stories
+22ft-21ft

Overall

10122

Females

3042

F18-39

3042

Passing Analysis

Category:
Athletes Passed
2499
Passed By
939
Net Change
+1560
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11809
5K → 10K276225+51#11809#11758
10K → 15K28778+209#11758#11549
15K → 20K27392+181#11549#11368
20K → Half3429+5#11368#11363
Half → 25K24170+171#11363#11192
25K → 30K231233-2#11192#11194
30K → 20M22229+193#11194#11001
20M → 21M17928+151#11001#10850
21M → 35K1381+137#10850#10713
35K → 23M17637+139#10713#10574
23M → 24M15626+130#10574#10444
24M → 40K14815+133#10444#10311
40K → 25.2M4125+16#10311#10295
25.2M → Finish9751+46#10295#10249
TOTALS2499939+1560
📊

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