Boston Marathon logo
BOSTON MARATHON 2023

John Krasniewicz

Bib: 15936•M

CT

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M70-74)
#0 / 213
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
10:24/mi
32:18
↑ 97↓ 3451.5%
10K· 6.21 mi
10:36/mi
1:05:15
↑ 79↓ 1380.4%
15K· 9.32 mi
10:29/mi
1:37:50
↑ 67↓ 78
20K· 12.43 mi
11:29/mi
2:13:30
↑ 106↓ 860.1%
Half· 13.11 mi
11:13/mi
2:21:09
↑ 19↓ 370.5%
25K· 15.53 mi
11:49/mi
2:49:47
↑ 66↓ 880.2%
30K· 18.64 mi
12:51/mi
3:29:42
↑ 181↓ 1480.2%
20M
12:57/mi
3:47:18
↑ 64↓ 500.2%
21M
13:57/mi
4:01:15
↑ 106↓ 241.6%
35K· 21.75 mi
11:55/mi
4:10:10
↑ 17↓ 861.7%
23M
12:45/mi
4:26:08
↑ 23↓ 630.6%
24M
11:45/mi
4:37:53
↓ 821.3%
40K· 24.85 mi
12:10/mi
4:48:17
↓ 200.3%
25.2M
13:32/mi
4:52:57
↑ 13↓ 160.2%
Finish· 26.22 mi
11:50/mi
5:05:01
↑ 22↓ 21

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:21:09
Pace10:46 /mi
2nd Half
Distance13.11 mi
Time2:43:52
Pace12:30 /mi
📊Positive Split: 16.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:03:1932:1810:2432:18
10:24
-
10K
6.21 mi11:36:161:05:1510:3032:57
10:36
+0:12
15K
9.32 mi12:08:511:37:5010:3032:35
10:29
-0:07
20K
12.43 mi12:44:312:13:3010:4535:40
11:29
+1:00
Half
13.11 mi12:52:102:21:0910:467:39
11:13
-0:16
25K
15.53 mi13:20:482:49:4710:5628:38
11:49
+0:36
30K
18.64 mi14:00:433:29:4211:1539:55
12:51
+1:02
20M
20.00 mi14:18:193:47:1811:2217:36
12:57
+0:06
21M
21.00 mi14:32:164:01:1511:2913:57
13:57
+1:00
35K
21.75 mi14:41:114:10:1011:308:55
11:55
-2:02
23M
23.00 mi14:57:094:26:0811:3415:58
12:45
+0:50
24M
24.00 mi15:08:544:37:5311:3511:45
11:45
-1:00
40K
24.85 mi15:19:184:48:1711:3610:24
12:10
+0:25
25.2M
25.20 mi15:23:584:52:5711:384:40
13:32
+1:22
Finish
26.22 mi15:36:025:05:0111:3912:04
11:50
-1:42

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

10:24 /mi

Average Pace

11:39 /mi

Slowest Pace

13:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:45:29

35% of race

Time at Steady Pace

1:47:26

35% of race

Time at Slower Pace

1:32:06

30% of race

Average Pace: 11:38 /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 mi11:03:1932:1810:2432:18
10:24
#24465
10K
6.21 mi11:36:161:05:1510:3032:57
10:36
#24716
15K
9.32 mi12:08:511:37:5010:3032:35
10:29
#24629
20K
12.43 mi12:44:312:13:3010:4535:40
11:29
#24841
Half
13.11 mi12:52:102:21:0910:467:39
11:13
#24866
25K
15.53 mi13:20:482:49:4710:5628:38
11:49
#24901
30K
18.64 mi14:00:433:29:4211:1539:55
12:51
#25034
20M
20.00 mi14:18:193:47:1811:2217:36
12:57
#25055
21M
21.00 mi14:32:164:01:1511:2913:57
13:57
#25088
35K
21.75 mi14:41:114:10:1011:308:55
11:55
#25069
23M
23.00 mi14:57:094:26:0811:3415:58
12:45
#25069
24M
24.00 mi15:08:544:37:5311:3511:45
11:45
#25059
40K
24.85 mi15:19:184:48:1711:3610:24
12:10
#25041
25.2M
25.20 mi15:23:584:52:5711:384:40
13:32
#25035
Finish
26.22 mi15:36:025:05:0111:3912:04
11:50
#25039
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM70-74Seg. OverallSeg. MalesSeg. M70-74
5K3.11 mi3.11 mi24465143101431024432(Top 92%)14269(Top 94%)14269(Top 6699%)
10K6.21 mi3.10 mi24716-25114418-10814418-10824866(Top 93%)14477(Top 95%)14477(Top 6797%)
15K9.32 mi3.11 mi24629+8714370+4814370+4824432(Top 92%)14269(Top 94%)14269(Top 6699%)
20K12.43 mi3.11 mi24841-21214458-8814458-8825217(Top 95%)14584(Top 96%)14584(Top 6847%)
Half13.11 mi0.68 mi24866-2514463-514463-525213(Top 95%)14571(Top 96%)14571(Top 6841%)
25K15.53 mi2.42 mi24901-3514466-314466-324989(Top 94%)14458(Top 95%)14458(Top 6788%)
30K18.64 mi3.11 mi25034-13314510-4414510-4425290(Top 95%)14537(Top 96%)14537(Top 6825%)
20M20.00 mi1.36 mi25055-2114506+414506+425129(Top 94%)14441(Top 95%)14441(Top 6780%)
21M21.00 mi1.00 mi25088-3314514-814514-824990(Top 94%)14363(Top 95%)14363(Top 6743%)
35K21.75 mi0.75 mi25069+1914492+2214492+2224604(Top 92%)14131(Top 93%)14131(Top 6634%)
23M23.00 mi1.25 mi2506914487+514487+524852(Top 93%)14268(Top 94%)14268(Top 6699%)
24M24.00 mi1.00 mi25059+1014481+614481+624205(Top 91%)13905(Top 92%)13905(Top 6528%)
40K24.85 mi0.85 mi25041+1814469+1214469+1224076(Top 90%)13843(Top 91%)13843(Top 6499%)
25.2M25.20 mi0.35 mi25035+614461+814461+824545(Top 92%)14064(Top 93%)14064(Top 6603%)
Finish26.22 mi1.02 mi25039-414459+214459+225087(Top 94%)14354(Top 95%)14354(Top 6739%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 92%
×21story building
+97ft-345ft

Overall

24432

Males

14269

M70-74

14269

5K→10K

3.1 - 6.2 mi

Top 93%
×5story building
+79ft-138ft

Overall

24866

Males

14477

M70-74

14477

10K→15K

6.2 - 9.3 mi

Top 92%
×3story building
+67ft-78ft

Overall

24432

Males

14269

M70-74

14269

15K→20K

9.3 - 12.4 mi

Top 95%
×5story building
+106ft-86ft

Overall

25217

Males

14584

M70-74

14584

20K→Half

12.4 - 13.1 mi

Top 95%
×2story building
+19ft-37ft

Overall

25213

Males

14571

M70-74

14571

Half→25K

13.1 - 15.5 mi

Top 94%
×4story building
+66ft-88ft

Overall

24989

Males

14458

M70-74

14458

25K→30K

15.5 - 18.6 mi

Top 95%
×9story building
+181ft-148ft

Overall

25290

Males

14537

M70-74

14537

30K→20M

18.6 - 20.0 mi

Top 94%
×5story building
+64ft-50ft

Overall

25129

Males

14441

M70-74

14441

20M→21M

20.0 - 21.0 mi

Top 94%
×8story building
+106ft-24ft

Overall

24990

Males

14363

M70-74

14363

21M→35K

21.0 - 21.8 mi

Top 92%
×7story building
+17ft-86ft

Overall

24604

Males

14131

M70-74

14131

35K→23M

21.8 - 23.0 mi

Top 93%
×5story building
+23ft-63ft

Overall

24852

Males

14268

M70-74

14268

23M→24M

23.0 - 24.0 mi

Top 91%
×6story building
+12ft-82ft

Overall

24205

Males

13905

M70-74

13905

24M→40K

24.0 - 24.9 mi

Top 90%
×1story
+6ft-20ft

Overall

24076

Males

13843

M70-74

13843

40K→25.2M

24.9 - 25.2 mi

Top 92%
×1story
+13ft-16ft

Overall

24545

Males

14064

M70-74

14064

25.2M→Finish

25.2 - 26.2 mi

Top 94%
×2story building
+22ft-21ft

Overall

25087

Males

14354

M70-74

14354

Passing Analysis

Category:
Athletes Passed
599
Passed By
1173
Net Change
-574
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24465
5K → 10K90341-251#24465#24716
10K → 15K15366+87#24716#24629
15K → 20K38250-212#24629#24841
20K → Half1237-25#24841#24866
Half → 25K6398-35#24866#24901
25K → 30K49182-133#24901#25034
30K → 20M3960-21#25034#25055
20M → 21M1649-33#25055#25088
21M → 35K3112+19#25088#25069
35K → 23M26260#25069#25069
23M → 24M2515+10#25069#25059
24M → 40K3214+18#25059#25041
40K → 25.2M148+6#25041#25035
25.2M → Finish1115-4#25035#25039
TOTALS5991173-574
📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing