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BOSTON MARATHON 2023

Ken Roznowski

Bib: 17589•M

MI

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 45%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Top 49%
Division (M60-64)
#0 / 1110
Top 15%
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
7:57/mi
24:43
↑ 97↓ 3451.5%
10K· 6.21 mi
7:56/mi
49:21
↑ 79↓ 1380.4%
15K· 9.32 mi
8:00/mi
1:14:13
↑ 67↓ 78
20K· 12.43 mi
7:57/mi
1:38:55
↑ 106↓ 860.1%
Half· 13.11 mi
7:58/mi
1:44:21
↑ 19↓ 370.5%
25K· 15.53 mi
8:02/mi
2:03:49
↑ 66↓ 880.2%
30K· 18.64 mi
8:02/mi
2:28:48
↑ 181↓ 1480.2%
20M
8:03/mi
2:39:45
↑ 64↓ 500.2%
21M
8:22/mi
2:48:07
↑ 106↓ 241.6%
35K· 21.75 mi
7:36/mi
2:53:48
↑ 17↓ 861.7%
23M
8:00/mi
3:03:49
↑ 23↓ 630.6%
24M
7:34/mi
3:11:23
↓ 821.3%
40K· 24.85 mi
7:50/mi
3:18:05
↓ 200.3%
25.2M
8:25/mi
3:20:59
↑ 13↓ 160.2%
Finish· 26.22 mi
7:39/mi
3:28:47
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:44:21
Pace7:58 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:44:26
Pace7:58 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:2124:437:5724:43
7:57
-
10K
6.21 mi11:39:5949:217:5724:38
7:56
-0:01
15K
9.32 mi12:04:511:14:137:5824:52
8:00
+0:04
20K
12.43 mi12:29:331:38:557:5824:42
7:57
-0:03
Half
13.11 mi12:34:591:44:217:585:26
7:58
+0:01
25K
15.53 mi12:54:272:03:497:5819:28
8:02
+0:04
30K
18.64 mi13:19:262:28:487:5924:59
8:02
0:00
20M
20.00 mi13:30:232:39:457:5910:57
8:03
+0:01
21M
21.00 mi13:38:452:48:078:008:22
8:22
+0:19
35K
21.75 mi13:44:262:53:487:595:41
7:36
-0:46
23M
23.00 mi13:54:273:03:498:0010:01
8:00
+0:24
24M
24.00 mi14:02:013:11:237:587:34
7:34
-0:26
40K
24.85 mi14:08:433:18:057:586:42
7:50
+0:16
25.2M
25.20 mi14:11:373:20:597:592:54
8:25
+0:35
Finish
26.22 mi14:19:253:28:477:587:48
7:39
-0:46

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

7:58 /mi

Slowest Pace

8:25 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:17:31

95% of race

Time at Steady Pace

11:16

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:58 /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 mi11:15:2124:437:5724:43
7:57
#13674
10K
6.21 mi11:39:5949:217:5724:38
7:56
#13917
15K
9.32 mi12:04:511:14:137:5824:52
8:00
#14067
20K
12.43 mi12:29:331:38:557:5824:42
7:57
#13771
Half
13.11 mi12:34:591:44:217:585:26
7:58
#13781
25K
15.53 mi12:54:272:03:497:5819:28
8:02
#13641
30K
18.64 mi13:19:262:28:487:5924:59
8:02
#13148
20M
20.00 mi13:30:232:39:457:5910:57
8:03
#12938
21M
21.00 mi13:38:452:48:078:008:22
8:22
#12695
35K
21.75 mi13:44:262:53:487:595:41
7:36
#12556
23M
23.00 mi13:54:273:03:498:0010:01
8:00
#12381
24M
24.00 mi14:02:013:11:237:587:34
7:34
#12205
40K
24.85 mi14:08:433:18:057:586:42
7:50
#12045
25.2M
25.20 mi14:11:373:20:597:592:54
8:25
#11987
Finish
26.22 mi14:19:253:28:477:587:48
7:39
#11886
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi136749825982514398(Top 54%)10056(Top 66%)10056(Top 906%)
10K6.21 mi3.10 mi13917-2439906-819906-8114215(Top 53%)10005(Top 66%)10005(Top 901%)
15K9.32 mi3.11 mi14067-1509947-419947-4114398(Top 54%)10056(Top 66%)10056(Top 906%)
20K12.43 mi3.11 mi13771+2969805+1429805+14213018(Top 49%)9441(Top 62%)9441(Top 851%)
Half13.11 mi0.68 mi13781-109815-109815-1013999(Top 53%)9882(Top 65%)9882(Top 890%)
25K15.53 mi2.42 mi13641+1409729+869729+8612959(Top 49%)9330(Top 61%)9330(Top 841%)
30K18.64 mi3.11 mi13148+4939494+2359494+23511222(Top 42%)8460(Top 56%)8460(Top 762%)
20M20.00 mi1.36 mi12938+2109387+1079387+10710697(Top 40%)8108(Top 53%)8108(Top 730%)
21M21.00 mi1.00 mi12695+2439269+1189269+1189638(Top 36%)7425(Top 49%)7425(Top 669%)
35K21.75 mi0.75 mi12556+1399198+719198+719256(Top 35%)7233(Top 48%)7233(Top 652%)
23M23.00 mi1.25 mi12381+1759096+1029096+1029729(Top 37%)7352(Top 48%)7352(Top 662%)
24M24.00 mi1.00 mi12205+1768997+998997+998167(Top 31%)6423(Top 42%)6423(Top 579%)
40K24.85 mi0.85 mi12045+1608900+978900+978907(Top 33%)6769(Top 45%)6769(Top 610%)
25.2M25.20 mi0.35 mi11987+588875+258875+258966(Top 34%)6739(Top 44%)6739(Top 607%)
Finish26.22 mi1.02 mi11886+1018811+648811+649649(Top 36%)7100(Top 47%)7100(Top 640%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 54%
×21story building
+97ft-345ft

Overall

14398

Males

10056

M60-64

10056

5K→10K

3.1 - 6.2 mi

Top 53%
×5story building
+79ft-138ft

Overall

14215

Males

10005

M60-64

10005

10K→15K

6.2 - 9.3 mi

Top 54%
×3story building
+67ft-78ft

Overall

14398

Males

10056

M60-64

10056

15K→20K

9.3 - 12.4 mi

Top 49%
×5story building
+106ft-86ft

Overall

13018

Males

9441

M60-64

9441

20K→Half

12.4 - 13.1 mi

Top 53%
×2story building
+19ft-37ft

Overall

13999

Males

9882

M60-64

9882

Half→25K

13.1 - 15.5 mi

Top 49%
×4story building
+66ft-88ft

Overall

12959

Males

9330

M60-64

9330

25K→30K

15.5 - 18.6 mi

Top 42%
×9story building
+181ft-148ft

Overall

11222

Males

8460

M60-64

8460

30K→20M

18.6 - 20.0 mi

Top 40%
×5story building
+64ft-50ft

Overall

10697

Males

8108

M60-64

8108

20M→21M

20.0 - 21.0 mi

Top 36%
×8story building
+106ft-24ft

Overall

9638

Males

7425

M60-64

7425

21M→35K

21.0 - 21.8 mi

Top 35%
×7story building
+17ft-86ft

Overall

9256

Males

7233

M60-64

7233

35K→23M

21.8 - 23.0 mi

Top 37%
×5story building
+23ft-63ft

Overall

9729

Males

7352

M60-64

7352

23M→24M

23.0 - 24.0 mi

Top 31%
×6story building
+12ft-82ft

Overall

8167

Males

6423

M60-64

6423

24M→40K

24.0 - 24.9 mi

Top 33%
×1story
+6ft-20ft

Overall

8907

Males

6769

M60-64

6769

40K→25.2M

24.9 - 25.2 mi

Top 34%
×1story
+13ft-16ft

Overall

8966

Males

6739

M60-64

6739

25.2M→Finish

25.2 - 26.2 mi

Top 36%
×2story building
+22ft-21ft

Overall

9649

Males

7100

M60-64

7100

Passing Analysis

Category:
Athletes Passed
2757
Passed By
969
Net Change
+1788
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13674
5K → 10K182425-243#13674#13917
10K → 15K135285-150#13917#14067
15K → 20K34246+296#14067#13771
20K → Half2434-10#13771#13781
Half → 25K20969+140#13781#13641
25K → 30K51724+493#13641#13148
30K → 20M22414+210#13148#12938
20M → 21M25613+243#12938#12695
21M → 35K1434+139#12695#12556
35K → 23M19318+175#12556#12381
23M → 24M1782+176#12381#12205
24M → 40K1655+160#12205#12045
40K → 25.2M646+58#12045#11987
25.2M → Finish12524+101#11987#11886
TOTALS2757969+1788
📊

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