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BOSTON MARATHON 2025

Todd Kornfeld

Bib: 7790•M

AZ

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 18%
Gender (Male)
#0 / 16105
Top 28%
Masters (Masters Men)
#0 / 10463
Top 14%
Division (M45-49)
#0 / 2386
Top 19%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:15
Rank: #6614
Start → 5K
21:15 | 6:50/mi
10K· 6.21 mi
42:22
Rank: #6474 (+140)
5K → 10K
21:07 | 6:48/mi
15K· 9.32 mi
1:03:33
Rank: #6372 (+102)
10K → 15K
21:11 | 6:49/mi
20K· 12.43 mi
1:24:49
Rank: #6163 (+209)
15K → 20K
21:16 | 6:51/mi
Half· 13.11 mi
1:29:28
Rank: #6167 (-4)
20K → Half
4:39 | 6:49/mi
25K· 15.53 mi
1:46:05
Rank: #5965 (+202)
Half → 25K
16:37 | 6:51/mi
30K· 18.64 mi
2:08:05
Rank: #5743 (+222)
25K → 30K
22:00 | 7:05/mi
20M
2:17:41
Rank: #5620 (+123)
30K → 20M
9:36 | 7:04/mi
21M
2:25:21
Rank: #5592 (+28)
20M → 21M
7:40 | 7:40/mi
35K· 21.75 mi
2:30:31
Rank: #5539 (+53)
21M → 35K
5:10 | 6:54/mi
23M
2:39:20
Rank: #5372 (+167)
35K → 23M
8:49 | 7:03/mi
24M
2:46:11
Rank: #5263 (+109)
23M → 24M
6:51 | 6:51/mi
40K· 24.85 mi
2:52:03
Rank: #5150 (+113)
24M → 40K
5:52 | 6:52/mi
25.2M
2:54:41
Rank: #5110 (+40)
40K → 25.2M
2:38 | 7:38/mi
Finish· 26.22 mi
3:01:33
Rank: #5023 (+87)
25.2M → Finish
6:52 | 6:44/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:29:28
Pace6:49 /mi
2nd Half
Distance13.11 mi
Time1:32:05
Pace7:01 /mi
📊Positive Split: 2.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:29:1621:156:5021:15
6:50
-
10K
6.21 mi10:50:2342:226:4921:07
6:48
-0:02
15K
9.32 mi11:11:341:03:336:4921:11
6:49
+0:01
20K
12.43 mi11:32:501:24:496:4921:16
6:51
+0:02
Half
13.11 mi11:37:291:29:286:494:39
6:49
-0:02
25K
15.53 mi11:54:061:46:056:5016:37
6:51
+0:02
30K
18.64 mi12:16:062:08:056:5222:00
7:05
+0:14
20M
20.00 mi12:25:422:17:416:539:36
7:04
-0:01
21M
21.00 mi12:33:222:25:216:557:40
7:40
+0:36
35K
21.75 mi12:38:322:30:316:555:10
6:54
-0:46
23M
23.00 mi12:47:212:39:206:568:49
7:03
+0:09
24M
24.00 mi12:54:122:46:116:556:51
6:51
-0:12
40K
24.85 mi13:00:042:52:036:555:52
6:52
+0:01
25.2M
25.20 mi13:02:422:54:416:562:38
7:38
+0:46
Finish
26.22 mi13:09:343:01:336:566:52
6:44
-0:54

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

6:44 /mi

Average Pace

6:56 /mi

Slowest Pace

7:40 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:51:15

94% of race

Time at Steady Pace

10:18

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:55 /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 mi10:29:1621:156:5021:15
6:50
#6614
10K
6.21 mi10:50:2342:226:4921:07
6:48
#6474
15K
9.32 mi11:11:341:03:336:4921:11
6:49
#6372
20K
12.43 mi11:32:501:24:496:4921:16
6:51
#6163
Half
13.11 mi11:37:291:29:286:494:39
6:49
#6167
25K
15.53 mi11:54:061:46:056:5016:37
6:51
#5965
30K
18.64 mi12:16:062:08:056:5222:00
7:05
#5743
20M
20.00 mi12:25:422:17:416:539:36
7:04
#5620
21M
21.00 mi12:33:222:25:216:557:40
7:40
#5592
35K
21.75 mi12:38:322:30:316:555:10
6:54
#5539
23M
23.00 mi12:47:212:39:206:568:49
7:03
#5372
24M
24.00 mi12:54:122:46:116:556:51
6:51
#5263
40K
24.85 mi13:00:042:52:036:555:52
6:52
#5150
25.2M
25.20 mi13:02:422:54:416:562:38
7:38
#5110
Finish
26.22 mi13:09:343:01:336:566:52
6:44
#5023
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi6614600360036233(Top 22%)5643(Top 35%)5643(Top 237%)
10K6.21 mi3.10 mi6474+1405892+1115892+1116339(Top 22%)5748(Top 36%)5748(Top 241%)
15K9.32 mi3.11 mi6372+1025802+905802+906233(Top 22%)5643(Top 35%)5643(Top 237%)
20K12.43 mi3.11 mi6163+2095616+1865616+1865726(Top 20%)5216(Top 32%)5216(Top 219%)
Half13.11 mi0.68 mi6167-4561656166204(Top 22%)5589(Top 35%)5589(Top 234%)
25K15.53 mi2.42 mi5965+2025429+1875429+1875289(Top 19%)4836(Top 30%)4836(Top 203%)
30K18.64 mi3.11 mi5743+2225230+1995230+1995198(Top 18%)4699(Top 29%)4699(Top 197%)
20M20.00 mi1.36 mi5620+1235128+1025128+1024470(Top 16%)4068(Top 25%)4068(Top 170%)
21M21.00 mi1.00 mi5592+285094+345094+345444(Top 19%)4690(Top 29%)4690(Top 197%)
35K21.75 mi0.75 mi5539+535043+515043+514740(Top 17%)4183(Top 26%)4183(Top 175%)
23M23.00 mi1.25 mi5372+1674894+1494894+1494006(Top 14%)3576(Top 22%)3576(Top 150%)
24M24.00 mi1.00 mi5263+1094790+1044790+1043797(Top 13%)3371(Top 21%)3371(Top 141%)
40K24.85 mi0.85 mi5150+1134684+1064684+1063148(Top 11%)2821(Top 18%)2821(Top 118%)
25.2M25.20 mi0.35 mi5110+404651+334651+334008(Top 14%)3424(Top 21%)3424(Top 144%)
Finish26.22 mi1.02 mi5023+874567+844567+844107(Top 14%)3510(Top 22%)3510(Top 147%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 22%
×21stories
+97ft-345ft

Overall

6233

Males

5643

M45-49

5643

5K→10K

3.1 - 6.2 mi

Top 22%
×5stories
+79ft-138ft

Overall

6339

Males

5748

M45-49

5748

10K→15K

6.2 - 9.3 mi

Top 22%
×3stories
+67ft-78ft

Overall

6233

Males

5643

M45-49

5643

15K→20K

9.3 - 12.4 mi

Top 20%
×5stories
+106ft-86ft

Overall

5726

Males

5216

M45-49

5216

20K→Half

12.4 - 13.1 mi

Top 22%
×2stories
+19ft-37ft

Overall

6204

Males

5589

M45-49

5589

Half→25K

13.1 - 15.5 mi

Top 19%
×4stories
+66ft-88ft

Overall

5289

Males

4836

M45-49

4836

25K→30K

15.5 - 18.6 mi

Top 18%
×9stories
+181ft-148ft

Overall

5198

Males

4699

M45-49

4699

30K→20M

18.6 - 20.0 mi

Top 16%
×5stories
+64ft-50ft

Overall

4470

Males

4068

M45-49

4068

20M→21M

20.0 - 21.0 mi

Top 19%
×8stories
+106ft-24ft

Overall

5444

Males

4690

M45-49

4690

21M→35K

21.0 - 21.8 mi

Top 17%
×7stories
+17ft-86ft

Overall

4740

Males

4183

M45-49

4183

35K→23M

21.8 - 23.0 mi

Top 14%
×5stories
+23ft-63ft

Overall

4006

Males

3576

M45-49

3576

23M→24M

23.0 - 24.0 mi

Top 13%
×6stories
+12ft-82ft

Overall

3797

Males

3371

M45-49

3371

24M→40K

24.0 - 24.9 mi

Top 11%
×1story
+6ft-20ft

Overall

3148

Males

2821

M45-49

2821

40K→25.2M

24.9 - 25.2 mi

Top 14%
×1story
+13ft-16ft

Overall

4008

Males

3424

M45-49

3424

25.2M→Finish

25.2 - 26.2 mi

Top 14%
×2stories
+22ft-21ft

Overall

4107

Males

3510

M45-49

3510

Passing Analysis

Category:
Athletes Passed
2105
Passed By
514
Net Change
+1591
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6614
5K → 10K259119+140#6614#6474
10K → 15K19391+102#6474#6372
15K → 20K26051+209#6372#6163
20K → Half2731-4#6163#6167
Half → 25K22624+202#6167#5965
25K → 30K29371+222#5965#5743
30K → 20M14320+123#5743#5620
20M → 21M8456+28#5620#5592
21M → 35K6916+53#5592#5539
35K → 23M17710+167#5539#5372
23M → 24M11910+109#5372#5263
24M → 40K1196+113#5263#5150
40K → 25.2M433+40#5150#5110
25.2M → Finish936+87#5110#5023
TOTALS2105514+1591
📊

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