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BOSTON MARATHON 2023

Brian Kallhof

Bib: 7238•M

MN

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 18%
Gender (Male)
#0 / 15176
Top 29%
Masters (Masters Men)
#0 / 9891
Top 15%
Division (M40-44)
#0 / 2241
Top 36%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:36
Rank: #7939
Start → 5K
22:36 | 7:16/mi
10K· 6.21 mi
44:38
Rank: #7643 (+296)
5K → 10K
22:02 | 7:06/mi
15K· 9.32 mi
1:06:24
Rank: #7258 (+385)
10K → 15K
21:46 | 7:00/mi
20K· 12.43 mi
1:27:59
Rank: #6803 (+455)
15K → 20K
21:35 | 6:57/mi
Half· 13.11 mi
1:32:40
Rank: #6755 (+48)
20K → Half
4:41 | 6:52/mi
25K· 15.53 mi
1:49:27
Rank: #6477 (+278)
Half → 25K
16:47 | 6:55/mi
30K· 18.64 mi
2:10:59
Rank: #5978 (+499)
25K → 30K
21:32 | 6:56/mi
20M
2:20:26
Rank: #5778 (+200)
30K → 20M
9:27 | 6:57/mi
21M
2:27:44
Rank: #5614 (+164)
20M → 21M
7:18 | 7:18/mi
35K· 21.75 mi
2:32:47
Rank: #5532 (+82)
21M → 35K
5:03 | 6:45/mi
23M
2:41:14
Rank: #5286 (+246)
35K → 23M
8:27 | 6:45/mi
24M
2:47:54
Rank: #5120 (+166)
23M → 24M
6:40 | 6:40/mi
40K· 24.85 mi
2:53:38
Rank: #4987 (+133)
24M → 40K
5:44 | 6:42/mi
25.2M
2:56:02
Rank: #4918 (+69)
40K → 25.2M
2:24 | 6:58/mi
Finish· 26.22 mi
3:02:30
Rank: #4721 (+197)
25.2M → Finish
6:28 | 6:21/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:32:40
Pace7:04 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:29:50
Pace6:51 /mi
📊Negative Split: 3.1% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:28:0222:367:1622:36
7:16
-
10K
6.21 mi10:50:0444:387:1122:02
7:06
-0:10
15K
9.32 mi11:11:501:06:247:0721:46
7:00
-0:06
20K
12.43 mi11:33:251:27:597:0521:35
6:57
-0:03
Half
13.11 mi11:38:061:32:407:044:41
6:52
-0:05
25K
15.53 mi11:54:531:49:277:0316:47
6:55
+0:03
30K
18.64 mi12:16:252:10:597:0221:32
6:56
+0:01
20M
20.00 mi12:25:522:20:267:019:27
6:57
+0:01
21M
21.00 mi12:33:102:27:447:027:18
7:18
+0:21
35K
21.75 mi12:38:132:32:477:025:03
6:45
-0:33
23M
23.00 mi12:46:402:41:147:018:27
6:45
0:00
24M
24.00 mi12:53:202:47:547:006:40
6:40
-0:05
40K
24.85 mi12:59:042:53:386:595:44
6:42
+0:02
25.2M
25.20 mi13:01:282:56:026:592:24
6:58
+0:16
Finish
26.22 mi13:07:563:02:306:586:28
6:21
-0:37

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

6:21 /mi

Average Pace

6:58 /mi

Slowest Pace

7:18 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:48:48

60% of race

Time at Steady Pace

1:13:42

40% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:58 /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 mi10:28:0222:367:1622:36
7:16
#7939
10K
6.21 mi10:50:0444:387:1122:02
7:06
#7643
15K
9.32 mi11:11:501:06:247:0721:46
7:00
#7258
20K
12.43 mi11:33:251:27:597:0521:35
6:57
#6803
Half
13.11 mi11:38:061:32:407:044:41
6:52
#6755
25K
15.53 mi11:54:531:49:277:0316:47
6:55
#6477
30K
18.64 mi12:16:252:10:597:0221:32
6:56
#5978
20M
20.00 mi12:25:522:20:267:019:27
6:57
#5778
21M
21.00 mi12:33:102:27:447:027:18
7:18
#5614
35K
21.75 mi12:38:132:32:477:025:03
6:45
#5532
23M
23.00 mi12:46:402:41:147:018:27
6:45
#5286
24M
24.00 mi12:53:202:47:547:006:40
6:40
#5120
40K
24.85 mi12:59:042:53:386:595:44
6:42
#4987
25.2M
25.20 mi13:01:282:56:026:592:24
6:58
#4918
Finish
26.22 mi13:07:563:02:306:586:28
6:21
#4721
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi7939693169316576(Top 25%)5916(Top 39%)5916(Top 264%)
10K6.21 mi3.10 mi7643+2966734+1976734+1977382(Top 28%)6515(Top 43%)6515(Top 291%)
15K9.32 mi3.11 mi7258+3856441+2936441+2936576(Top 25%)5916(Top 39%)5916(Top 264%)
20K12.43 mi3.11 mi6803+4556102+3396102+3395638(Top 21%)5175(Top 34%)5175(Top 231%)
Half13.11 mi0.68 mi6755+486065+376065+375712(Top 21%)5244(Top 35%)5244(Top 234%)
25K15.53 mi2.42 mi6477+2785833+2325833+2325093(Top 19%)4703(Top 31%)4703(Top 210%)
30K18.64 mi3.11 mi5978+4995451+3825451+3823884(Top 15%)3639(Top 24%)3639(Top 162%)
20M20.00 mi1.36 mi5778+2005281+1705281+1703754(Top 14%)3498(Top 23%)3498(Top 156%)
21M21.00 mi1.00 mi5614+1645147+1345147+1343622(Top 14%)3362(Top 22%)3362(Top 150%)
35K21.75 mi0.75 mi5532+825075+725075+723891(Top 15%)3585(Top 24%)3585(Top 160%)
23M23.00 mi1.25 mi5286+2464854+2214854+2212404(Top 9%)2261(Top 15%)2261(Top 101%)
24M24.00 mi1.00 mi5120+1664706+1484706+1482955(Top 11%)2747(Top 18%)2747(Top 123%)
40K24.85 mi0.85 mi4987+1334593+1134593+1132400(Top 9%)2230(Top 15%)2230(Top 100%)
25.2M25.20 mi0.35 mi4918+694530+634530+631677(Top 6%)1583(Top 10%)1583(Top 71%)
Finish26.22 mi1.02 mi4721+1974362+1684362+1681829(Top 7%)1713(Top 11%)1713(Top 76%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 25%
×21stories
+97ft-345ft

Overall

6576

Males

5916

M40-44

5916

5K→10K

3.1 - 6.2 mi

Top 28%
×5stories
+79ft-138ft

Overall

7382

Males

6515

M40-44

6515

10K→15K

6.2 - 9.3 mi

Top 25%
×3stories
+67ft-78ft

Overall

6576

Males

5916

M40-44

5916

15K→20K

9.3 - 12.4 mi

Top 21%
×5stories
+106ft-86ft

Overall

5638

Males

5175

M40-44

5175

20K→Half

12.4 - 13.1 mi

Top 21%
×2stories
+19ft-37ft

Overall

5712

Males

5244

M40-44

5244

Half→25K

13.1 - 15.5 mi

Top 19%
×4stories
+66ft-88ft

Overall

5093

Males

4703

M40-44

4703

25K→30K

15.5 - 18.6 mi

Top 15%
×9stories
+181ft-148ft

Overall

3884

Males

3639

M40-44

3639

30K→20M

18.6 - 20.0 mi

Top 14%
×5stories
+64ft-50ft

Overall

3754

Males

3498

M40-44

3498

20M→21M

20.0 - 21.0 mi

Top 14%
×8stories
+106ft-24ft

Overall

3622

Males

3362

M40-44

3362

21M→35K

21.0 - 21.8 mi

Top 15%
×7stories
+17ft-86ft

Overall

3891

Males

3585

M40-44

3585

35K→23M

21.8 - 23.0 mi

Top 9%
×5stories
+23ft-63ft

Overall

2404

Males

2261

M40-44

2261

23M→24M

23.0 - 24.0 mi

Top 11%
×6stories
+12ft-82ft

Overall

2955

Males

2747

M40-44

2747

24M→40K

24.0 - 24.9 mi

Top 9%
×1story
+6ft-20ft

Overall

2400

Males

2230

M40-44

2230

40K→25.2M

24.9 - 25.2 mi

Top 6%
×1story
+13ft-16ft

Overall

1677

Males

1583

M40-44

1583

25.2M→Finish

25.2 - 26.2 mi

Top 7%
×2stories
+22ft-21ft

Overall

1829

Males

1713

M40-44

1713

Passing Analysis

Category:
Athletes Passed
3377
Passed By
159
Net Change
+3218
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7939
5K → 10K415119+296#7939#7643
10K → 15K40722+385#7643#7258
15K → 20K4550+455#7258#6803
20K → Half502+48#6803#6755
Half → 25K2802+278#6755#6477
25K → 30K5001+499#6477#5978
30K → 20M2011+200#5978#5778
20M → 21M1662+164#5778#5614
21M → 35K853+82#5614#5532
35K → 23M2482+246#5532#5286
23M → 24M1671+166#5286#5120
24M → 40K1352+133#5120#4987
40K → 25.2M690+69#4987#4918
25.2M → Finish1992+197#4918#4721
TOTALS3377159+3218
📊

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