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BOSTON MARATHON 2025

Kailey Jacobs

Bib: 30445•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

Start
0:00:00
Race begins
5K· 3.11 mi
31:20
Rank: #25788
Start → 5K
31:20 | 10:05/mi
10K· 6.21 mi
1:03:55
Rank: #26072 (-284)
5K → 10K
32:35 | 10:29/mi
15K· 9.32 mi
1:33:23
Rank: #25336 (+736)
10K → 15K
29:28 | 9:29/mi
20K· 12.43 mi
2:05:32
Rank: #25236 (+100)
15K → 20K
32:09 | 10:21/mi
Half· 13.11 mi
2:11:58
Rank: #25155 (+81)
20K → Half
6:26 | 9:26/mi
25K· 15.53 mi
2:37:49
Rank: #25042 (+113)
Half → 25K
25:51 | 10:40/mi
30K· 18.64 mi
3:14:02
Rank: #25067 (-25)
25K → 30K
36:13 | 11:39/mi
20M
3:29:15
Rank: #25002 (+65)
30K → 20M
15:13 | 11:12/mi
21M
3:40:13
Rank: #24828 (+174)
20M → 21M
10:58 | 10:58/mi
35K· 21.75 mi
3:47:56
Rank: #24766 (+62)
21M → 35K
7:43 | 10:19/mi
23M
4:00:36
Rank: #24624 (+142)
35K → 23M
12:40 | 10:07/mi
24M
4:11:02
Rank: #24539 (+85)
23M → 24M
10:26 | 10:26/mi
40K· 24.85 mi
4:20:01
Rank: #24464 (+75)
24M → 40K
8:59 | 10:30/mi
25.2M
4:23:43
Rank: #24411 (+53)
40K → 25.2M
3:42 | 10:44/mi
Finish· 26.22 mi
4:33:23
Rank: #24313 (+98)
25.2M → Finish
9:40 | 9:29/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:11:58
Pace10:04 /mi
2nd Half
Distance13.11 mi
Time2:21:25
Pace10:47 /mi
📊Positive Split: 7.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:52:2731:2010:0531:20
10:05
-
10K
6.21 mi12:25:021:03:5510:1732:35
10:29
+0:24
15K
9.32 mi12:54:301:33:2310:0129:28
9:29
-1:00
20K
12.43 mi13:26:392:05:3210:0632:09
10:21
+0:52
Half
13.11 mi13:33:052:11:5810:046:26
9:26
-0:55
25K
15.53 mi13:58:562:37:4910:1025:51
10:40
+1:14
30K
18.64 mi14:35:093:14:0210:2536:13
11:39
+0:59
20M
20.00 mi14:50:223:29:1510:2815:13
11:12
-0:27
21M
21.00 mi15:01:203:40:1310:2910:58
10:58
-0:14
35K
21.75 mi15:09:033:47:5610:297:43
10:19
-0:39
23M
23.00 mi15:21:434:00:3610:2812:40
10:07
-0:12
24M
24.00 mi15:32:094:11:0210:2810:26
10:26
+0:19
40K
24.85 mi15:41:084:20:0110:288:59
10:30
+0:04
25.2M
25.20 mi15:44:504:23:4310:283:42
10:44
+0:14
Finish
26.22 mi15:54:304:33:2310:269:40
9:29
-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

9:26 /mi

Average Pace

10:26 /mi

Slowest Pace

11:39 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:29:34

33% of race

Time at Steady Pace

2:01:25

44% of race

Time at Slower Pace

1:02:24

23% of race

Average Pace: 10:26 /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 mi11:52:2731:2010:0531:20
10:05
#25788
10K
6.21 mi12:25:021:03:5510:1732:35
10:29
#26072
15K
9.32 mi12:54:301:33:2310:0129:28
9:29
#25336
20K
12.43 mi13:26:392:05:3210:0632:09
10:21
#25236
Half
13.11 mi13:33:052:11:5810:046:26
9:26
#25155
25K
15.53 mi13:58:562:37:4910:1025:51
10:40
#25042
30K
18.64 mi14:35:093:14:0210:2536:13
11:39
#25067
20M
20.00 mi14:50:223:29:1510:2815:13
11:12
#25002
21M
21.00 mi15:01:203:40:1310:2910:58
10:58
#24828
35K
21.75 mi15:09:033:47:5610:297:43
10:19
#24766
23M
23.00 mi15:21:434:00:3610:2812:40
10:07
#24624
24M
24.00 mi15:32:094:11:0210:2810:26
10:26
#24539
40K
24.85 mi15:41:084:20:0110:288:59
10:30
#24464
25.2M
25.20 mi15:44:504:23:4310:283:42
10:44
#24411
Finish
26.22 mi15:54:304:33:2310:269:40
9:29
#24313
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi25788106341063423705(Top 83%)9492(Top 78%)9492(Top 174%)
10K6.21 mi3.10 mi26072-28410813-17910813-17926242(Top 92%)10931(Top 89%)10931(Top 200%)
15K9.32 mi3.11 mi25336+73610408+40510408+40523705(Top 83%)9492(Top 78%)9492(Top 174%)
20K12.43 mi3.11 mi25236+10010364+4410364+4424918(Top 88%)10213(Top 84%)10213(Top 187%)
Half13.11 mi0.68 mi25155+8110323+4110323+4123383(Top 82%)9369(Top 77%)9369(Top 171%)
25K15.53 mi2.42 mi25042+11310273+5010273+5024657(Top 87%)10106(Top 83%)10106(Top 185%)
30K18.64 mi3.11 mi25067-2510317-4410317-4425081(Top 88%)10452(Top 85%)10452(Top 191%)
20M20.00 mi1.36 mi25002+6510295+2210295+2224000(Top 84%)9956(Top 81%)9956(Top 182%)
21M21.00 mi1.00 mi24828+17410211+8410211+8421321(Top 75%)8615(Top 70%)8615(Top 158%)
35K21.75 mi0.75 mi24766+6210182+2910182+2922762(Top 80%)9425(Top 77%)9425(Top 172%)
23M23.00 mi1.25 mi24624+14210128+5410128+5420889(Top 74%)8504(Top 70%)8504(Top 155%)
24M24.00 mi1.00 mi24539+8510094+3410094+3422657(Top 80%)9466(Top 77%)9466(Top 173%)
40K24.85 mi0.85 mi24464+7510061+3310061+3321981(Top 77%)9192(Top 75%)9192(Top 168%)
25.2M25.20 mi0.35 mi24411+5310032+2910032+2919895(Top 70%)8123(Top 66%)8123(Top 149%)
Finish26.22 mi1.02 mi24313+9810000+3210000+3221159(Top 74%)8745(Top 72%)8745(Top 160%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 83%
×21stories
+97ft-345ft

Overall

23705

Females

9492

F18-39

9492

5K→10K

3.1 - 6.2 mi

Top 92%
×5stories
+79ft-138ft

Overall

26242

Females

10931

F18-39

10931

10K→15K

6.2 - 9.3 mi

Top 83%
×3stories
+67ft-78ft

Overall

23705

Females

9492

F18-39

9492

15K→20K

9.3 - 12.4 mi

Top 88%
×5stories
+106ft-86ft

Overall

24918

Females

10213

F18-39

10213

20K→Half

12.4 - 13.1 mi

Top 82%
×2stories
+19ft-37ft

Overall

23383

Females

9369

F18-39

9369

Half→25K

13.1 - 15.5 mi

Top 87%
×4stories
+66ft-88ft

Overall

24657

Females

10106

F18-39

10106

25K→30K

15.5 - 18.6 mi

Top 88%
×9stories
+181ft-148ft

Overall

25081

Females

10452

F18-39

10452

30K→20M

18.6 - 20.0 mi

Top 84%
×5stories
+64ft-50ft

Overall

24000

Females

9956

F18-39

9956

20M→21M

20.0 - 21.0 mi

Top 75%
×8stories
+106ft-24ft

Overall

21321

Females

8615

F18-39

8615

21M→35K

21.0 - 21.8 mi

Top 80%
×7stories
+17ft-86ft

Overall

22762

Females

9425

F18-39

9425

35K→23M

21.8 - 23.0 mi

Top 74%
×5stories
+23ft-63ft

Overall

20889

Females

8504

F18-39

8504

23M→24M

23.0 - 24.0 mi

Top 80%
×6stories
+12ft-82ft

Overall

22657

Females

9466

F18-39

9466

24M→40K

24.0 - 24.9 mi

Top 77%
×1story
+6ft-20ft

Overall

21981

Females

9192

F18-39

9192

40K→25.2M

24.9 - 25.2 mi

Top 70%
×1story
+13ft-16ft

Overall

19895

Females

8123

F18-39

8123

25.2M→Finish

25.2 - 26.2 mi

Top 74%
×2stories
+22ft-21ft

Overall

21159

Females

8745

F18-39

8745

Passing Analysis

Category:
Athletes Passed
2186
Passed By
711
Net Change
+1475
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25788
5K → 10K99383-284#25788#26072
10K → 15K7382+736#26072#25336
15K → 20K17575+100#25336#25236
20K → Half832+81#25236#25155
Half → 25K16350+113#25155#25042
25K → 30K116141-25#25042#25067
30K → 20M9025+65#25067#25002
20M → 21M1762+174#25002#24828
21M → 35K697+62#24828#24766
35K → 23M1486+142#24766#24624
23M → 24M916+85#24624#24539
24M → 40K816+75#24539#24464
40K → 25.2M541+53#24464#24411
25.2M → Finish1035+98#24411#24313
TOTALS2186711+1475
📊

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