Boston Marathon logo
BOSTON MARATHON 2023

Rafal Kuc

Bib: 12547•M

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M50-54)
#0 / 2052
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
7:51/mi
24:24
↑ 97↓ 3451.5%
10K· 6.21 mi
7:54/mi
48:56
↑ 79↓ 1380.4%
15K· 9.32 mi
7:52/mi
1:13:23
↑ 67↓ 78
20K· 12.43 mi
8:02/mi
1:38:20
↑ 106↓ 860.1%
Half· 13.11 mi
7:55/mi
1:43:44
↑ 19↓ 370.5%
25K· 15.53 mi
8:12/mi
2:03:38
↑ 66↓ 880.2%
30K· 18.64 mi
8:49/mi
2:31:00
↑ 181↓ 1480.2%
20M
9:12/mi
2:43:30
↑ 64↓ 500.2%
21M
10:09/mi
2:53:39
↑ 106↓ 241.6%
35K· 21.75 mi
9:19/mi
3:00:37
↑ 17↓ 861.7%
23M
10:11/mi
3:13:22
↑ 23↓ 630.6%
24M
10:34/mi
3:23:56
↓ 821.3%
40K· 24.85 mi
10:47/mi
3:33:09
↓ 200.3%
25.2M
12:02/mi
3:37:18
↑ 13↓ 160.2%
Finish· 26.22 mi
10:36/mi
3:48:06
↑ 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
Time1:43:44
Pace7:55 /mi
2nd Half
Distance13.11 mi
Time2:04:22
Pace9:29 /mi
📊Positive Split: 19.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:4424:247:5124:24
7:51
-
10K
6.21 mi11:16:1648:567:5324:32
7:54
+0:03
15K
9.32 mi11:40:431:13:237:5224:27
7:52
-0:02
20K
12.43 mi12:05:401:38:207:5524:57
8:02
+0:10
Half
13.11 mi12:11:041:43:447:555:24
7:55
-0:07
25K
15.53 mi12:30:582:03:387:5819:54
8:12
+0:17
30K
18.64 mi12:58:202:31:008:0627:22
8:49
+0:37
20M
20.00 mi13:10:502:43:308:1012:30
9:12
+0:23
21M
21.00 mi13:20:592:53:398:1610:09
10:09
+0:57
35K
21.75 mi13:27:573:00:378:186:58
9:19
-0:50
23M
23.00 mi13:40:423:13:228:2412:45
10:11
+0:52
24M
24.00 mi13:51:163:23:568:3010:34
10:34
+0:23
40K
24.85 mi14:00:293:33:098:359:13
10:47
+0:13
25.2M
25.20 mi14:04:383:37:188:374:09
12:02
+1:15
Finish
26.22 mi14:15:263:48:068:4210:48
10:36
-1:26

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

7:51 /mi

Average Pace

8:42 /mi

Slowest Pace

12:02 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:03:38

54% of race

Time at Steady Pace

46:50

21% of race

Time at Slower Pace

57:38

25% of race

Average Pace: 8:42 /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 mi10:51:4424:247:5124:24
7:51
#12867
10K
6.21 mi11:16:1648:567:5324:32
7:54
#13385
15K
9.32 mi11:40:431:13:237:5224:27
7:52
#13347
20K
12.43 mi12:05:401:38:207:5524:57
8:02
#13418
Half
13.11 mi12:11:041:43:447:555:24
7:55
#13421
25K
15.53 mi12:30:582:03:387:5819:54
8:12
#13537
30K
18.64 mi12:58:202:31:008:0627:22
8:49
#14108
20M
20.00 mi13:10:502:43:308:1012:30
9:12
#14377
21M
21.00 mi13:20:592:53:398:1610:09
10:09
#14686
35K
21.75 mi13:27:573:00:378:186:58
9:19
#14883
23M
23.00 mi13:40:423:13:228:2412:45
10:11
#15341
24M
24.00 mi13:51:163:23:568:3010:34
10:34
#15864
40K
24.85 mi14:00:293:33:098:359:13
10:47
#16229
25.2M
25.20 mi14:04:383:37:188:374:09
12:02
#16424
Finish
26.22 mi14:15:263:48:068:4210:48
10:36
#16871
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi128679489948913264(Top 50%)9608(Top 63%)9608(Top 468%)
10K6.21 mi3.10 mi13385-5189693-2049693-20413954(Top 52%)9923(Top 65%)9923(Top 484%)
15K9.32 mi3.11 mi13347+389670+239670+2313264(Top 50%)9608(Top 63%)9608(Top 468%)
20K12.43 mi3.11 mi13418-719671-19671-113692(Top 51%)9748(Top 64%)9748(Top 475%)
Half13.11 mi0.68 mi13421-39669+29669+213677(Top 51%)9787(Top 64%)9787(Top 477%)
25K15.53 mi2.42 mi13537-1169696-279696-2714284(Top 54%)9889(Top 65%)9889(Top 482%)
30K18.64 mi3.11 mi14108-5719882-1869882-18616115(Top 61%)10531(Top 69%)10531(Top 513%)
20M20.00 mi1.36 mi14377-2699951-699951-6917521(Top 66%)11035(Top 73%)11035(Top 538%)
21M21.00 mi1.00 mi14686-30910068-11710068-11718530(Top 70%)11438(Top 75%)11438(Top 557%)
35K21.75 mi0.75 mi14883-19710128-6010128-6019174(Top 72%)11657(Top 77%)11657(Top 568%)
23M23.00 mi1.25 mi15341-45810266-13810266-13820507(Top 77%)12248(Top 81%)12248(Top 597%)
24M24.00 mi1.00 mi15864-52310448-18210448-18222155(Top 83%)12940(Top 85%)12940(Top 631%)
40K24.85 mi0.85 mi16229-36510598-15010598-15021880(Top 82%)12767(Top 84%)12767(Top 622%)
25.2M25.20 mi0.35 mi16424-19510668-7010668-7022527(Top 85%)13082(Top 86%)13082(Top 638%)
Finish26.22 mi1.02 mi16871-44710849-18110849-18123195(Top 87%)13424(Top 88%)13424(Top 654%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 50%
×21story building
+97ft-345ft

Overall

13264

Males

9608

M50-54

9608

5K→10K

3.1 - 6.2 mi

Top 52%
×5story building
+79ft-138ft

Overall

13954

Males

9923

M50-54

9923

10K→15K

6.2 - 9.3 mi

Top 50%
×3story building
+67ft-78ft

Overall

13264

Males

9608

M50-54

9608

15K→20K

9.3 - 12.4 mi

Top 51%
×5story building
+106ft-86ft

Overall

13692

Males

9748

M50-54

9748

20K→Half

12.4 - 13.1 mi

Top 51%
×2story building
+19ft-37ft

Overall

13677

Males

9787

M50-54

9787

Half→25K

13.1 - 15.5 mi

Top 54%
×4story building
+66ft-88ft

Overall

14284

Males

9889

M50-54

9889

25K→30K

15.5 - 18.6 mi

Top 61%
×9story building
+181ft-148ft

Overall

16115

Males

10531

M50-54

10531

30K→20M

18.6 - 20.0 mi

Top 66%
×5story building
+64ft-50ft

Overall

17521

Males

11035

M50-54

11035

20M→21M

20.0 - 21.0 mi

Top 70%
×8story building
+106ft-24ft

Overall

18530

Males

11438

M50-54

11438

21M→35K

21.0 - 21.8 mi

Top 72%
×7story building
+17ft-86ft

Overall

19174

Males

11657

M50-54

11657

35K→23M

21.8 - 23.0 mi

Top 77%
×5story building
+23ft-63ft

Overall

20507

Males

12248

M50-54

12248

23M→24M

23.0 - 24.0 mi

Top 83%
×6story building
+12ft-82ft

Overall

22155

Males

12940

M50-54

12940

24M→40K

24.0 - 24.9 mi

Top 82%
×1story
+6ft-20ft

Overall

21880

Males

12767

M50-54

12767

40K→25.2M

24.9 - 25.2 mi

Top 85%
×1story
+13ft-16ft

Overall

22527

Males

13082

M50-54

13082

25.2M→Finish

25.2 - 26.2 mi

Top 87%
×2story building
+22ft-21ft

Overall

23195

Males

13424

M50-54

13424

Passing Analysis

Category:
Athletes Passed
822
Passed By
4826
Net Change
-4004
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12867
5K → 10K123641-518#12867#13385
10K → 15K228190+38#13385#13347
15K → 20K154225-71#13347#13418
20K → Half3134-3#13418#13421
Half → 25K96212-116#13421#13537
25K → 30K68639-571#13537#14108
30K → 20M35304-269#14108#14377
20M → 21M18327-309#14377#14686
21M → 35K17214-197#14686#14883
35K → 23M19477-458#14883#15341
23M → 24M7530-523#15341#15864
24M → 40K12377-365#15864#16229
40K → 25.2M4199-195#16229#16424
25.2M → Finish10457-447#16424#16871
TOTALS8224826-4004
📊

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