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BOSTON MARATHON 2023

Jeremy Koch

Bib: 10250•M

GA

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

⏱️ 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
9:19/mi
28:58
↑ 97↓ 3451.5%
10K· 6.21 mi
9:29/mi
58:25
↑ 79↓ 1380.4%
15K· 9.32 mi
9:37/mi
1:28:19
↑ 67↓ 78
20K· 12.43 mi
9:37/mi
1:58:12
↑ 106↓ 860.1%
Half· 13.11 mi
9:18/mi
2:04:33
↑ 19↓ 370.5%
25K· 15.53 mi
9:33/mi
2:27:42
↑ 66↓ 880.2%
30K· 18.64 mi
9:40/mi
2:57:45
↑ 181↓ 1480.2%
20M
9:56/mi
3:11:15
↑ 64↓ 500.2%
21M
10:01/mi
3:21:16
↑ 106↓ 241.6%
35K· 21.75 mi
9:49/mi
3:28:37
↑ 17↓ 861.7%
23M
9:50/mi
3:40:56
↑ 23↓ 630.6%
24M
9:59/mi
3:50:55
↓ 821.3%
40K· 24.85 mi
10:14/mi
3:59:40
↓ 200.3%
25.2M
10:26/mi
4:03:16
↑ 13↓ 160.2%
Finish· 26.22 mi
9:32/mi
4:12:59
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:04:33
Pace9:30 /mi
2nd Half
Distance13.11 mi
Time2:08:26
Pace9:48 /mi
📊Positive Split: 3.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:55:2128:589:1928:58
9:19
-
10K
6.21 mi11:24:4858:259:2429:27
9:29
+0:10
15K
9.32 mi11:54:421:28:199:2829:54
9:37
+0:08
20K
12.43 mi12:24:351:58:129:3129:54
9:37
0:00
Half
13.11 mi12:30:562:04:339:306:21
9:18
-0:19
25K
15.53 mi12:54:052:27:429:3023:09
9:33
+0:15
30K
18.64 mi13:24:082:57:459:3230:03
9:40
+0:07
20M
20.00 mi13:37:383:11:159:3413:30
9:56
+0:16
21M
21.00 mi13:47:393:21:169:3510:01
10:01
+0:05
35K
21.75 mi13:55:003:28:379:367:21
9:49
-0:12
23M
23.00 mi14:07:193:40:569:3612:19
9:50
+0:01
24M
24.00 mi14:17:183:50:559:379:59
9:59
+0:09
40K
24.85 mi14:26:033:59:409:398:45
10:14
+0:15
25.2M
25.20 mi14:29:394:03:169:393:36
10:26
+0:12
Finish
26.22 mi14:39:224:12:599:399:43
9:32
-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

9:18 /mi

Average Pace

9:39 /mi

Slowest Pace

10:26 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

4:00:38

95% of race

Time at Steady Pace

12:21

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:39 /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 mi10:55:2128:589:1928:58
9:19
#21597
10K
6.21 mi11:24:4858:259:2429:27
9:29
#22050
15K
9.32 mi11:54:421:28:199:2829:54
9:37
#22221
20K
12.43 mi12:24:351:58:129:3129:54
9:37
#22147
Half
13.11 mi12:30:562:04:339:306:21
9:18
#22108
25K
15.53 mi12:54:052:27:429:3023:09
9:33
#21915
30K
18.64 mi13:24:082:57:459:3230:03
9:40
#21579
20M
20.00 mi13:37:383:11:159:3413:30
9:56
#21499
21M
21.00 mi13:47:393:21:169:3510:01
10:01
#21292
35K
21.75 mi13:55:003:28:379:367:21
9:49
#21273
23M
23.00 mi14:07:193:40:569:3612:19
9:50
#21153
24M
24.00 mi14:17:183:50:559:379:59
9:59
#21115
40K
24.85 mi14:26:033:59:409:398:45
10:14
#21093
25.2M
25.20 mi14:29:394:03:169:393:36
10:26
#21064
Finish
26.22 mi14:39:224:12:599:399:43
9:32
#21026
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi21597128871288722581(Top 85%)13441(Top 89%)13441(Top 600%)
10K6.21 mi3.10 mi22050-45313147-26013147-26022459(Top 84%)13372(Top 88%)13372(Top 597%)
15K9.32 mi3.11 mi22221-17113251-10413251-10422581(Top 85%)13441(Top 89%)13441(Top 600%)
20K12.43 mi3.11 mi22147+7413216+3513216+3521920(Top 82%)13144(Top 87%)13144(Top 587%)
Half13.11 mi0.68 mi22108+3913196+2013196+2021507(Top 81%)12961(Top 85%)12961(Top 578%)
25K15.53 mi2.42 mi21915+19313115+8113115+8120991(Top 79%)12706(Top 84%)12706(Top 567%)
30K18.64 mi3.11 mi21579+33612954+16112954+16120037(Top 75%)12230(Top 81%)12230(Top 546%)
20M20.00 mi1.36 mi21499+8012914+4012914+4020282(Top 76%)12249(Top 81%)12249(Top 547%)
21M21.00 mi1.00 mi21292+20712797+11712797+11718097(Top 68%)11268(Top 74%)11268(Top 503%)
35K21.75 mi0.75 mi21273+1912783+1412783+1420817(Top 78%)12395(Top 82%)12395(Top 553%)
23M23.00 mi1.25 mi21153+12012712+7112712+7119527(Top 73%)11811(Top 78%)11811(Top 527%)
24M24.00 mi1.00 mi21115+3812684+2812684+2820742(Top 78%)12315(Top 81%)12315(Top 550%)
40K24.85 mi0.85 mi21093+2212663+2112663+2120568(Top 77%)12185(Top 80%)12185(Top 544%)
25.2M25.20 mi0.35 mi21064+2912643+2012643+2018891(Top 71%)11426(Top 75%)11426(Top 510%)
Finish26.22 mi1.02 mi21026+3812617+2612617+2620243(Top 76%)12078(Top 80%)12078(Top 539%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 85%
×21story building
+97ft-345ft

Overall

22581

Males

13441

M40-44

13441

5K→10K

3.1 - 6.2 mi

Top 84%
×5story building
+79ft-138ft

Overall

22459

Males

13372

M40-44

13372

10K→15K

6.2 - 9.3 mi

Top 85%
×3story building
+67ft-78ft

Overall

22581

Males

13441

M40-44

13441

15K→20K

9.3 - 12.4 mi

Top 82%
×5story building
+106ft-86ft

Overall

21920

Males

13144

M40-44

13144

20K→Half

12.4 - 13.1 mi

Top 81%
×2story building
+19ft-37ft

Overall

21507

Males

12961

M40-44

12961

Half→25K

13.1 - 15.5 mi

Top 79%
×4story building
+66ft-88ft

Overall

20991

Males

12706

M40-44

12706

25K→30K

15.5 - 18.6 mi

Top 75%
×9story building
+181ft-148ft

Overall

20037

Males

12230

M40-44

12230

30K→20M

18.6 - 20.0 mi

Top 76%
×5story building
+64ft-50ft

Overall

20282

Males

12249

M40-44

12249

20M→21M

20.0 - 21.0 mi

Top 68%
×8story building
+106ft-24ft

Overall

18097

Males

11268

M40-44

11268

21M→35K

21.0 - 21.8 mi

Top 78%
×7story building
+17ft-86ft

Overall

20817

Males

12395

M40-44

12395

35K→23M

21.8 - 23.0 mi

Top 73%
×5story building
+23ft-63ft

Overall

19527

Males

11811

M40-44

11811

23M→24M

23.0 - 24.0 mi

Top 78%
×6story building
+12ft-82ft

Overall

20742

Males

12315

M40-44

12315

24M→40K

24.0 - 24.9 mi

Top 77%
×1story
+6ft-20ft

Overall

20568

Males

12185

M40-44

12185

40K→25.2M

24.9 - 25.2 mi

Top 71%
×1story
+13ft-16ft

Overall

18891

Males

11426

M40-44

11426

25.2M→Finish

25.2 - 26.2 mi

Top 76%
×2story building
+22ft-21ft

Overall

20243

Males

12078

M40-44

12078

Passing Analysis

Category:
Athletes Passed
1685
Passed By
1114
Net Change
+571
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21597
5K → 10K103556-453#21597#22050
10K → 15K111282-171#22050#22221
15K → 20K17096+74#22221#22147
20K → Half489+39#22147#22108
Half → 25K21118+193#22108#21915
25K → 30K34610+336#21915#21579
30K → 20M10121+80#21579#21499
20M → 21M2103+207#21499#21292
21M → 35K4122+19#21292#21273
35K → 23M13212+120#21273#21153
23M → 24M6426+38#21153#21115
24M → 40K5331+22#21115#21093
40K → 25.2M356+29#21093#21064
25.2M → Finish6022+38#21064#21026
TOTALS16851114+571
📊

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