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BOSTON MARATHON 2023

Jim Kasperik

Bib: 26013•M

PA

0:00
0:00
/ mi
Masters
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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
10:02/mi
31:09
↑ 97↓ 3451.5%
10K· 6.21 mi
9:42/mi
1:01:18
↑ 79↓ 1380.4%
15K· 9.32 mi
9:21/mi
1:30:20
↑ 67↓ 78
20K· 12.43 mi
9:23/mi
1:59:28
↑ 106↓ 860.1%
Half· 13.11 mi
8:51/mi
2:05:30
↑ 19↓ 370.5%
25K· 15.53 mi
9:23/mi
2:28:14
↑ 66↓ 880.2%
30K· 18.64 mi
9:33/mi
2:57:55
↑ 181↓ 1480.2%
20M
11:02/mi
3:12:55
↑ 64↓ 500.2%
21M
10:41/mi
3:23:36
↑ 106↓ 241.6%
35K· 21.75 mi
10:42/mi
3:31:36
↑ 17↓ 861.7%
23M
9:58/mi
3:44:05
↑ 23↓ 630.6%
24M
9:55/mi
3:54:00
↓ 821.3%
40K· 24.85 mi
10:44/mi
4:03:11
↓ 200.3%
25.2M
12:54/mi
4:07:38
↑ 13↓ 160.2%
Finish· 26.22 mi
9:38/mi
4:17:27
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:05:30
Pace9:34 /mi
2nd Half
Distance13.11 mi
Time2:11:57
Pace10:04 /mi
📊Positive Split: 5.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:51:3631:0910:0231:09
10:02
-
10K
6.21 mi12:21:451:01:189:5230:09
9:42
-0:20
15K
9.32 mi12:50:471:30:209:4229:02
9:21
-0:21
20K
12.43 mi13:19:551:59:289:3729:08
9:23
+0:02
Half
13.11 mi13:25:572:05:309:346:02
8:51
-0:32
25K
15.53 mi13:48:412:28:149:3322:44
9:23
+0:32
30K
18.64 mi14:18:222:57:559:3329:41
9:33
+0:10
20M
20.00 mi14:33:223:12:559:3915:00
11:02
+1:29
21M
21.00 mi14:44:033:23:369:4210:41
10:41
-0:21
35K
21.75 mi14:52:033:31:369:448:00
10:42
+0:01
23M
23.00 mi15:04:323:44:059:4512:29
9:58
-0:44
24M
24.00 mi15:14:273:54:009:459:55
9:55
-0:03
40K
24.85 mi15:23:384:03:119:479:11
10:44
+0:49
25.2M
25.20 mi15:28:054:07:389:504:27
12:54
+2:10
Finish
26.22 mi15:37:544:17:279:509:49
9:38
-3:16

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

8:51 /mi

Average Pace

9:50 /mi

Slowest Pace

12:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:26:56

34% of race

Time at Steady Pace

2:03:12

48% of race

Time at Slower Pace

47:19

18% of race

Average Pace: 9:49 /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 mi11:51:3631:0910:0231:09
10:02
#23496
10K
6.21 mi12:21:451:01:189:5230:09
9:42
#23313
15K
9.32 mi12:50:471:30:209:4229:02
9:21
#22851
20K
12.43 mi13:19:551:59:289:3729:08
9:23
#22438
Half
13.11 mi13:25:572:05:309:346:02
8:51
#22313
25K
15.53 mi13:48:412:28:149:3322:44
9:23
#22011
30K
18.64 mi14:18:222:57:559:3329:41
9:33
#21603
20M
20.00 mi14:33:223:12:559:3915:00
11:02
#21719
21M
21.00 mi14:44:033:23:369:4210:41
10:41
#21634
35K
21.75 mi14:52:033:31:369:448:00
10:42
#21699
23M
23.00 mi15:04:323:44:059:4512:29
9:58
#21578
24M
24.00 mi15:14:273:54:009:459:55
9:55
#21535
40K
24.85 mi15:23:384:03:119:479:11
10:44
#21552
25.2M
25.20 mi15:28:054:07:389:504:27
12:54
#21620
Finish
26.22 mi15:37:544:17:279:509:49
9:38
#21572
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi23496138291382921789(Top 82%)13102(Top 86%)13102(Top 638%)
10K6.21 mi3.10 mi23313+18313759+7013759+7023059(Top 87%)13673(Top 90%)13673(Top 666%)
15K9.32 mi3.11 mi22851+46213569+19013569+19021789(Top 82%)13102(Top 86%)13102(Top 638%)
20K12.43 mi3.11 mi22438+41313365+20413365+20421180(Top 80%)12829(Top 85%)12829(Top 625%)
Half13.11 mi0.68 mi22313+12513304+6113304+6119719(Top 74%)12204(Top 80%)12204(Top 595%)
25K15.53 mi2.42 mi22011+30213157+14713157+14720433(Top 77%)12466(Top 82%)12466(Top 608%)
30K18.64 mi3.11 mi21603+40812967+19012967+19019633(Top 74%)12063(Top 79%)12063(Top 588%)
20M20.00 mi1.36 mi21719-11613013-4613013-4622759(Top 85%)13346(Top 88%)13346(Top 650%)
21M21.00 mi1.00 mi21634+8512963+5012963+5020101(Top 76%)12103(Top 80%)12103(Top 590%)
35K21.75 mi0.75 mi21699-6512978-1512978-1522729(Top 85%)13265(Top 87%)13265(Top 646%)
23M23.00 mi1.25 mi21578+12112909+6912909+6919909(Top 75%)11985(Top 79%)11985(Top 584%)
24M24.00 mi1.00 mi21535+4312881+2812881+2820547(Top 77%)12235(Top 81%)12235(Top 596%)
40K24.85 mi0.85 mi21552-1712875+612875+621802(Top 82%)12738(Top 84%)12738(Top 621%)
25.2M25.20 mi0.35 mi21620-6812901-2612901-2623832(Top 90%)13700(Top 90%)13700(Top 668%)
Finish26.22 mi1.02 mi21572+4812873+2812873+2820583(Top 77%)12224(Top 81%)12224(Top 596%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 82%
×21story building
+97ft-345ft

Overall

21789

Males

13102

M50-54

13102

5K→10K

3.1 - 6.2 mi

Top 87%
×5story building
+79ft-138ft

Overall

23059

Males

13673

M50-54

13673

10K→15K

6.2 - 9.3 mi

Top 82%
×3story building
+67ft-78ft

Overall

21789

Males

13102

M50-54

13102

15K→20K

9.3 - 12.4 mi

Top 80%
×5story building
+106ft-86ft

Overall

21180

Males

12829

M50-54

12829

20K→Half

12.4 - 13.1 mi

Top 74%
×2story building
+19ft-37ft

Overall

19719

Males

12204

M50-54

12204

Half→25K

13.1 - 15.5 mi

Top 77%
×4story building
+66ft-88ft

Overall

20433

Males

12466

M50-54

12466

25K→30K

15.5 - 18.6 mi

Top 74%
×9story building
+181ft-148ft

Overall

19633

Males

12063

M50-54

12063

30K→20M

18.6 - 20.0 mi

Top 85%
×5story building
+64ft-50ft

Overall

22759

Males

13346

M50-54

13346

20M→21M

20.0 - 21.0 mi

Top 76%
×8story building
+106ft-24ft

Overall

20101

Males

12103

M50-54

12103

21M→35K

21.0 - 21.8 mi

Top 85%
×7story building
+17ft-86ft

Overall

22729

Males

13265

M50-54

13265

35K→23M

21.8 - 23.0 mi

Top 75%
×5story building
+23ft-63ft

Overall

19909

Males

11985

M50-54

11985

23M→24M

23.0 - 24.0 mi

Top 77%
×6story building
+12ft-82ft

Overall

20547

Males

12235

M50-54

12235

24M→40K

24.0 - 24.9 mi

Top 82%
×1story
+6ft-20ft

Overall

21802

Males

12738

M50-54

12738

40K→25.2M

24.9 - 25.2 mi

Top 90%
×1story
+13ft-16ft

Overall

23832

Males

13700

M50-54

13700

25.2M→Finish

25.2 - 26.2 mi

Top 77%
×2story building
+22ft-21ft

Overall

20583

Males

12224

M50-54

12224

Passing Analysis

Category:
Athletes Passed
2518
Passed By
594
Net Change
+1924
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23496
5K → 10K311128+183#23496#23313
10K → 15K47816+462#23313#22851
15K → 20K42411+413#22851#22438
20K → Half1283+125#22438#22313
Half → 25K3053+302#22313#22011
25K → 30K4157+408#22011#21603
30K → 20M25141-116#21603#21719
20M → 21M10621+85#21719#21634
21M → 35K2186-65#21634#21699
35K → 23M13615+121#21699#21578
23M → 24M5613+43#21578#21535
24M → 40K3956-17#21535#21552
40K → 25.2M1078-68#21552#21620
25.2M → Finish6416+48#21620#21572
TOTALS2518594+1924
📊

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