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BOSTON MARATHON 2025

Kelly Jacobs

Bib: 15579•F

VA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 47%
Gender (Female)
#0 / 12228
Top 33%
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
7:25/mi
23:01
↑ 97↓ 3451.5%
10K· 6.21 mi
7:33/mi
46:29
↑ 79↓ 1380.4%
15K· 9.32 mi
7:32/mi
1:09:54
↑ 67↓ 78
20K· 12.43 mi
7:42/mi
1:33:48
↑ 106↓ 860.1%
Half· 13.11 mi
7:39/mi
1:39:01
↑ 19↓ 370.5%
25K· 15.53 mi
7:50/mi
1:58:00
↑ 66↓ 880.2%
30K· 18.64 mi
8:09/mi
2:23:20
↑ 181↓ 1480.2%
20M
8:28/mi
2:34:51
↑ 64↓ 500.2%
21M
9:18/mi
2:44:09
↑ 106↓ 241.6%
35K· 21.75 mi
8:48/mi
2:50:44
↑ 17↓ 861.7%
23M
8:50/mi
3:01:48
↑ 23↓ 630.6%
24M
8:55/mi
3:10:43
↓ 821.3%
40K· 24.85 mi
9:02/mi
3:18:26
↓ 200.3%
25.2M
10:15/mi
3:21:58
↑ 13↓ 160.2%
Finish· 26.22 mi
8:45/mi
3:30:53
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:39:01
Pace7:33 /mi
2nd Half
Distance13.11 mi
Time1:51:52
Pace8:32 /mi
📊Positive Split: 13.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:54:1023:017:2523:01
7:25
-
10K
6.21 mi11:17:3846:297:2923:28
7:33
+0:08
15K
9.32 mi11:41:031:09:547:3023:25
7:32
-0:01
20K
12.43 mi12:04:571:33:487:3323:54
7:42
+0:10
Half
13.11 mi12:10:101:39:017:335:13
7:39
-0:03
25K
15.53 mi12:29:091:58:007:3618:59
7:50
+0:11
30K
18.64 mi12:54:292:23:207:4125:20
8:09
+0:19
20M
20.00 mi13:06:002:34:517:4511:31
8:28
+0:19
21M
21.00 mi13:15:182:44:097:499:18
9:18
+0:50
35K
21.75 mi13:21:532:50:447:516:35
8:48
-0:30
23M
23.00 mi13:32:573:01:487:5411:04
8:50
+0:02
24M
24.00 mi13:41:523:10:437:578:55
8:55
+0:05
40K
24.85 mi13:49:353:18:267:597:43
9:02
+0:07
25.2M
25.20 mi13:53:073:21:588:013:32
10:15
+1:13
Finish
26.22 mi14:02:023:30:538:038:55
8:45
-1:30

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

7:25 /mi

Average Pace

8:03 /mi

Slowest Pace

10:15 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:58:00

56% of race

Time at Steady Pace

1:03:25

30% of race

Time at Slower Pace

29:28

14% of race

Average Pace: 8:03 /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 mi10:54:1023:017:2523:01
7:25
#11376
10K
6.21 mi11:17:3846:297:2923:28
7:33
#11953
15K
9.32 mi11:41:031:09:547:3023:25
7:32
#11980
20K
12.43 mi12:04:571:33:487:3323:54
7:42
#12054
Half
13.11 mi12:10:101:39:017:335:13
7:39
#12094
25K
15.53 mi12:29:091:58:007:3618:59
7:50
#12145
30K
18.64 mi12:54:292:23:207:4125:20
8:09
#12165
20M
20.00 mi13:06:002:34:517:4511:31
8:28
#12258
21M
21.00 mi13:15:182:44:097:499:18
9:18
#12432
35K
21.75 mi13:21:532:50:447:516:35
8:48
#12622
23M
23.00 mi13:32:573:01:487:5411:04
8:50
#12790
24M
24.00 mi13:41:523:10:437:578:55
8:55
#13009
40K
24.85 mi13:49:353:18:267:597:43
9:02
#13140
25.2M
25.20 mi13:53:073:21:588:013:32
10:15
#13234
Finish
26.22 mi14:02:023:30:538:038:55
8:45
#13438
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi113762477247712067(Top 42%)2942(Top 24%)2942(Top 54%)
10K6.21 mi3.10 mi11953-5772785-3082785-30812568(Top 44%)3135(Top 26%)3135(Top 57%)
15K9.32 mi3.11 mi11980-272823-382823-3812067(Top 42%)2942(Top 24%)2942(Top 54%)
20K12.43 mi3.11 mi12054-742901-782901-7812319(Top 43%)3186(Top 26%)3186(Top 58%)
Half13.11 mi0.68 mi12094-402932-312932-3112877(Top 45%)3455(Top 28%)3455(Top 63%)
25K15.53 mi2.42 mi12145-513001-693001-6912565(Top 44%)3440(Top 28%)3440(Top 63%)
30K18.64 mi3.11 mi12165-203082-813082-8112460(Top 44%)3545(Top 29%)3545(Top 65%)
20M20.00 mi1.36 mi12258-933175-933175-9313582(Top 48%)4299(Top 35%)4299(Top 79%)
21M21.00 mi1.00 mi12432-1743304-1293304-12915116(Top 53%)5247(Top 43%)5247(Top 96%)
35K21.75 mi0.75 mi12622-1903432-1283432-12817197(Top 61%)6476(Top 53%)6476(Top 118%)
23M23.00 mi1.25 mi12790-1683548-1163548-11615289(Top 54%)5498(Top 45%)5498(Top 101%)
24M24.00 mi1.00 mi13009-2193710-1623710-16216896(Top 59%)6449(Top 53%)6449(Top 118%)
40K24.85 mi0.85 mi13140-1313806-963806-9616398(Top 58%)6275(Top 51%)6275(Top 115%)
25.2M25.20 mi0.35 mi13234-943873-673873-6717979(Top 63%)7155(Top 59%)7155(Top 131%)
Finish26.22 mi1.02 mi13438-2044005-1324005-13217729(Top 62%)6954(Top 57%)6954(Top 127%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 42%
×21story building
+97ft-345ft

Overall

12067

Females

2942

F18-39

2942

5K→10K

3.1 - 6.2 mi

Top 44%
×5story building
+79ft-138ft

Overall

12568

Females

3135

F18-39

3135

10K→15K

6.2 - 9.3 mi

Top 42%
×3story building
+67ft-78ft

Overall

12067

Females

2942

F18-39

2942

15K→20K

9.3 - 12.4 mi

Top 43%
×5story building
+106ft-86ft

Overall

12319

Females

3186

F18-39

3186

20K→Half

12.4 - 13.1 mi

Top 45%
×2story building
+19ft-37ft

Overall

12877

Females

3455

F18-39

3455

Half→25K

13.1 - 15.5 mi

Top 44%
×4story building
+66ft-88ft

Overall

12565

Females

3440

F18-39

3440

25K→30K

15.5 - 18.6 mi

Top 44%
×9story building
+181ft-148ft

Overall

12460

Females

3545

F18-39

3545

30K→20M

18.6 - 20.0 mi

Top 48%
×5story building
+64ft-50ft

Overall

13582

Females

4299

F18-39

4299

20M→21M

20.0 - 21.0 mi

Top 53%
×8story building
+106ft-24ft

Overall

15116

Females

5247

F18-39

5247

21M→35K

21.0 - 21.8 mi

Top 61%
×7story building
+17ft-86ft

Overall

17197

Females

6476

F18-39

6476

35K→23M

21.8 - 23.0 mi

Top 54%
×5story building
+23ft-63ft

Overall

15289

Females

5498

F18-39

5498

23M→24M

23.0 - 24.0 mi

Top 59%
×6story building
+12ft-82ft

Overall

16896

Females

6449

F18-39

6449

24M→40K

24.0 - 24.9 mi

Top 58%
×1story
+6ft-20ft

Overall

16398

Females

6275

F18-39

6275

40K→25.2M

24.9 - 25.2 mi

Top 63%
×1story
+13ft-16ft

Overall

17979

Females

7155

F18-39

7155

25.2M→Finish

25.2 - 26.2 mi

Top 62%
×2story building
+22ft-21ft

Overall

17729

Females

6954

F18-39

6954

Passing Analysis

Category:
Athletes Passed
1189
Passed By
3251
Net Change
-2062
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11376
5K → 10K76653-577#11376#11953
10K → 15K171198-27#11953#11980
15K → 20K168242-74#11980#12054
20K → Half2565-40#12054#12094
Half → 25K145196-51#12094#12145
25K → 30K245265-20#12145#12165
30K → 20M94187-93#12165#12258
20M → 21M53227-174#12258#12432
21M → 35K31221-190#12432#12622
35K → 23M67235-168#12622#12790
23M → 24M34253-219#12790#13009
24M → 40K44175-131#13009#13140
40K → 25.2M15109-94#13140#13234
25.2M → Finish21225-204#13234#13438
TOTALS11893251-2062
📊

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