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BOSTON MARATHON 2025

Jackson Lefler

Bib: 2649•M

NC

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Division (M18-39)
#0 / 5642
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:49
Rank: #13642
Start → 5K
23:49 | 7:40/mi
10K· 6.21 mi
47:20
Rank: #13192 (+450)
5K → 10K
23:31 | 7:34/mi
15K· 9.32 mi
1:11:10
Rank: #13179 (+13)
10K → 15K
23:50 | 7:40/mi
20K· 12.43 mi
1:35:47
Rank: #13435 (-256)
15K → 20K
24:37 | 7:55/mi
Half· 13.11 mi
1:41:10
Rank: #13514 (-79)
20K → Half
5:23 | 7:53/mi
25K· 15.53 mi
2:01:09
Rank: #13881 (-367)
Half → 25K
19:59 | 8:15/mi
30K· 18.64 mi
2:28:27
Rank: #14400 (-519)
25K → 30K
27:18 | 8:47/mi
20M
2:40:34
Rank: #14563 (-163)
30K → 20M
12:07 | 8:55/mi
21M
2:49:47
Rank: #14552 (+11)
20M → 21M
9:13 | 9:13/mi
35K· 21.75 mi
2:56:10
Rank: #14575 (-23)
21M → 35K
6:23 | 8:32/mi
23M
3:07:11
Rank: #14592 (-17)
35K → 23M
11:01 | 8:48/mi
24M
3:15:50
Rank: #14612 (-20)
23M → 24M
8:39 | 8:39/mi
40K· 24.85 mi
3:23:14
Rank: #14573 (+39)
24M → 40K
7:24 | 8:39/mi
25.2M
3:26:22
Rank: #14527 (+46)
40K → 25.2M
3:08 | 9:05/mi
Finish· 26.22 mi
3:34:29
Rank: #14413 (+114)
25.2M → Finish
8:07 | 7:58/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:41:10
Pace7:43 /mi
2nd Half
Distance13.11 mi
Time1:53:19
Pace8:39 /mi
📊Positive Split: 12.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:55:5223:497:4023:49
7:40
-
10K
6.21 mi11:19:2347:207:3723:31
7:34
-0:06
15K
9.32 mi11:43:131:11:107:3823:50
7:40
+0:06
20K
12.43 mi12:07:501:35:477:4224:37
7:55
+0:15
Half
13.11 mi12:13:131:41:107:435:23
7:53
-0:02
25K
15.53 mi12:33:122:01:097:4819:59
8:15
+0:22
30K
18.64 mi13:00:302:28:277:5827:18
8:47
+0:32
20M
20.00 mi13:12:372:40:348:0212:07
8:55
+0:08
21M
21.00 mi13:21:502:49:478:059:13
9:13
+0:18
35K
21.75 mi13:28:132:56:108:066:23
8:32
-0:41
23M
23.00 mi13:39:143:07:118:0811:01
8:48
+0:16
24M
24.00 mi13:47:533:15:508:108:39
8:39
-0:09
40K
24.85 mi13:55:173:23:148:117:24
8:39
0:00
25.2M
25.20 mi13:58:253:26:228:113:08
9:05
+0:26
Finish
26.22 mi14:06:323:34:298:118:07
7:58
-1:07

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

7:34 /mi

Average Pace

8:11 /mi

Slowest Pace

9:13 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:09:16

60% of race

Time at Steady Pace

1:00:45

28% of race

Time at Slower Pace

24:28

11% of race

Average Pace: 8:11 /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 mi10:55:5223:497:4023:49
7:40
#13642
10K
6.21 mi11:19:2347:207:3723:31
7:34
#13192
15K
9.32 mi11:43:131:11:107:3823:50
7:40
#13179
20K
12.43 mi12:07:501:35:477:4224:37
7:55
#13435
Half
13.11 mi12:13:131:41:107:435:23
7:53
#13514
25K
15.53 mi12:33:122:01:097:4819:59
8:15
#13881
30K
18.64 mi13:00:302:28:277:5827:18
8:47
#14400
20M
20.00 mi13:12:372:40:348:0212:07
8:55
#14563
21M
21.00 mi13:21:502:49:478:059:13
9:13
#14552
35K
21.75 mi13:28:132:56:108:066:23
8:32
#14575
23M
23.00 mi13:39:143:07:118:0811:01
8:48
#14592
24M
24.00 mi13:47:533:15:508:108:39
8:39
#14612
40K
24.85 mi13:55:173:23:148:117:24
8:39
#14573
25.2M
25.20 mi13:58:253:26:228:113:08
9:05
#14527
Finish
26.22 mi14:06:323:34:298:118:07
7:58
#14413
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi136429924992413212(Top 47%)9613(Top 60%)9613(Top 170%)
10K6.21 mi3.10 mi13192+4509699+2259699+22512740(Top 45%)9487(Top 59%)9487(Top 168%)
15K9.32 mi3.11 mi13179+139643+569643+5613212(Top 47%)9613(Top 60%)9613(Top 170%)
20K12.43 mi3.11 mi13435-2569716-739716-7314289(Top 50%)10003(Top 62%)10003(Top 177%)
Half13.11 mi0.68 mi13514-799736-209736-2014949(Top 53%)10312(Top 64%)10312(Top 183%)
25K15.53 mi2.42 mi13881-3679861-1259861-12515555(Top 55%)10454(Top 65%)10454(Top 185%)
30K18.64 mi3.11 mi14400-51910025-16410025-16416501(Top 58%)10711(Top 67%)10711(Top 190%)
20M20.00 mi1.36 mi14563-16310073-4810073-4816316(Top 57%)10488(Top 65%)10488(Top 186%)
21M21.00 mi1.00 mi14552+1110036+3710036+3714694(Top 52%)9658(Top 60%)9658(Top 171%)
35K21.75 mi0.75 mi14575-2310037-110037-115631(Top 55%)9999(Top 62%)9999(Top 177%)
23M23.00 mi1.25 mi14592-1710006+3110006+3115088(Top 53%)9663(Top 60%)9663(Top 171%)
24M24.00 mi1.00 mi14612-209989+179989+1715422(Top 54%)9773(Top 61%)9773(Top 173%)
40K24.85 mi0.85 mi14573+399947+429947+4214358(Top 51%)9157(Top 57%)9157(Top 162%)
25.2M25.20 mi0.35 mi14527+469907+409907+4012253(Top 43%)8136(Top 51%)8136(Top 144%)
Finish26.22 mi1.02 mi14413+1149826+819826+8112642(Top 45%)8360(Top 52%)8360(Top 148%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 47%
×21stories
+97ft-345ft

Overall

13212

Males

9613

M18-39

9613

5K→10K

3.1 - 6.2 mi

Top 45%
×5stories
+79ft-138ft

Overall

12740

Males

9487

M18-39

9487

10K→15K

6.2 - 9.3 mi

Top 47%
×3stories
+67ft-78ft

Overall

13212

Males

9613

M18-39

9613

15K→20K

9.3 - 12.4 mi

Top 50%
×5stories
+106ft-86ft

Overall

14289

Males

10003

M18-39

10003

20K→Half

12.4 - 13.1 mi

Top 53%
×2stories
+19ft-37ft

Overall

14949

Males

10312

M18-39

10312

Half→25K

13.1 - 15.5 mi

Top 55%
×4stories
+66ft-88ft

Overall

15555

Males

10454

M18-39

10454

25K→30K

15.5 - 18.6 mi

Top 58%
×9stories
+181ft-148ft

Overall

16501

Males

10711

M18-39

10711

30K→20M

18.6 - 20.0 mi

Top 57%
×5stories
+64ft-50ft

Overall

16316

Males

10488

M18-39

10488

20M→21M

20.0 - 21.0 mi

Top 52%
×8stories
+106ft-24ft

Overall

14694

Males

9658

M18-39

9658

21M→35K

21.0 - 21.8 mi

Top 55%
×7stories
+17ft-86ft

Overall

15631

Males

9999

M18-39

9999

35K→23M

21.8 - 23.0 mi

Top 53%
×5stories
+23ft-63ft

Overall

15088

Males

9663

M18-39

9663

23M→24M

23.0 - 24.0 mi

Top 54%
×6stories
+12ft-82ft

Overall

15422

Males

9773

M18-39

9773

24M→40K

24.0 - 24.9 mi

Top 51%
×1story
+6ft-20ft

Overall

14358

Males

9157

M18-39

9157

40K→25.2M

24.9 - 25.2 mi

Top 43%
×1story
+13ft-16ft

Overall

12253

Males

8136

M18-39

8136

25.2M→Finish

25.2 - 26.2 mi

Top 45%
×2stories
+22ft-21ft

Overall

12642

Males

8360

M18-39

8360

Passing Analysis

Category:
Athletes Passed
1830
Passed By
2601
Net Change
-771
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13642
5K → 10K556106+450#13642#13192
10K → 15K203190+13#13192#13179
15K → 20K132388-256#13179#13435
20K → Half1594-79#13435#13514
Half → 25K94461-367#13514#13881
25K → 30K123642-519#13881#14400
30K → 20M87250-163#14400#14563
20M → 21M115104+11#14563#14552
21M → 35K6689-23#14552#14575
35K → 23M87104-17#14575#14592
23M → 24M6888-20#14592#14612
24M → 40K9051+39#14612#14573
40K → 25.2M5610+46#14573#14527
25.2M → Finish13824+114#14527#14413
TOTALS18302601-771
📊

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