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BOSTON MARATHON 2023

Jason Klein

Bib: 3452•M

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0:00
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Overall
#0 / 26622
Top 22%
Gender (Male)
#0 / 15176
Top 35%
Division (M18-39)
#0 / 5285
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:15
Rank: #2382
Start → 5K
20:15 | 6:31/mi
10K· 6.21 mi
40:37
Rank: #2718 (-336)
5K → 10K
20:22 | 6:33/mi
15K· 9.32 mi
1:01:07
Rank: #2879 (-161)
10K → 15K
20:30 | 6:36/mi
20K· 12.43 mi
1:21:50
Rank: #2977 (-98)
15K → 20K
20:43 | 6:40/mi
Half· 13.11 mi
1:26:17
Rank: #2965 (+12)
20K → Half
4:27 | 6:31/mi
25K· 15.53 mi
1:42:29
Rank: #2977 (-12)
Half → 25K
16:12 | 6:41/mi
30K· 18.64 mi
2:05:37
Rank: #3766 (-789)
25K → 30K
23:08 | 7:27/mi
20M
2:16:38
Rank: #4443 (-677)
30K → 20M
11:01 | 8:07/mi
21M
2:24:45
Rank: #4680 (-237)
20M → 21M
8:07 | 8:07/mi
35K· 21.75 mi
2:30:27
Rank: #4852 (-172)
21M → 35K
5:42 | 7:37/mi
23M
2:40:35
Rank: #5122 (-270)
35K → 23M
10:08 | 8:06/mi
24M
2:48:52
Rank: #5369 (-247)
23M → 24M
8:17 | 8:17/mi
40K· 24.85 mi
2:56:29
Rank: #5638 (-269)
24M → 40K
7:37 | 8:54/mi
25.2M
2:59:33
Rank: #5706 (-68)
40K → 25.2M
3:04 | 8:54/mi
Finish· 26.22 mi
3:07:44
Rank: #5874 (-168)
25.2M → Finish
8:11 | 8:02/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:26:17
Pace6:35 /mi
2nd Half
Distance13.11 mi
Time1:41:27
Pace7:44 /mi
📊Positive Split: 17.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:21:3220:156:3120:15
6:31
-
10K
6.21 mi10:41:5440:376:3220:22
6:33
+0:02
15K
9.32 mi11:02:241:01:076:3320:30
6:36
+0:03
20K
12.43 mi11:23:071:21:506:3520:43
6:40
+0:04
Half
13.11 mi11:27:341:26:176:354:27
6:31
-0:09
25K
15.53 mi11:43:461:42:296:3616:12
6:41
+0:10
30K
18.64 mi12:06:542:05:376:4423:08
7:27
+0:46
20M
20.00 mi12:17:552:16:386:5011:01
8:07
+0:40
21M
21.00 mi12:26:022:24:456:548:07
8:07
0:00
35K
21.75 mi12:31:442:30:276:555:42
7:37
-0:30
23M
23.00 mi12:41:522:40:356:5910:08
8:06
+0:29
24M
24.00 mi12:50:092:48:527:028:17
8:17
+0:11
40K
24.85 mi12:57:462:56:297:067:37
8:54
+0:37
25.2M
25.20 mi13:00:502:59:337:083:04
8:54
0:00
Finish
26.22 mi13:09:013:07:447:108:11
8:02
-0:52

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

6:31 /mi

Average Pace

7:10 /mi

Slowest Pace

8:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:42:29

55% of race

Time at Steady Pace

37:01

20% of race

Time at Slower Pace

48:14

26% of race

Average Pace: 7:10 /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 mi10:21:3220:156:3120:15
6:31
#2382
10K
6.21 mi10:41:5440:376:3220:22
6:33
#2718
15K
9.32 mi11:02:241:01:076:3320:30
6:36
#2879
20K
12.43 mi11:23:071:21:506:3520:43
6:40
#2977
Half
13.11 mi11:27:341:26:176:354:27
6:31
#2965
25K
15.53 mi11:43:461:42:296:3616:12
6:41
#2977
30K
18.64 mi12:06:542:05:376:4423:08
7:27
#3766
20M
20.00 mi12:17:552:16:386:5011:01
8:07
#4443
21M
21.00 mi12:26:022:24:456:548:07
8:07
#4680
35K
21.75 mi12:31:442:30:276:555:42
7:37
#4852
23M
23.00 mi12:41:522:40:356:5910:08
8:06
#5122
24M
24.00 mi12:50:092:48:527:028:17
8:17
#5369
40K
24.85 mi12:57:462:56:297:067:37
8:54
#5638
25.2M
25.20 mi13:00:502:59:337:083:04
8:54
#5706
Finish
26.22 mi13:09:013:07:447:108:11
8:02
#5874
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2382227222723292(Top 12%)3127(Top 21%)3127(Top 59%)
10K6.21 mi3.10 mi2718-3362594-3222594-3223176(Top 12%)3028(Top 20%)3028(Top 57%)
15K9.32 mi3.11 mi2879-1612749-1552749-1553292(Top 12%)3127(Top 21%)3127(Top 59%)
20K12.43 mi3.11 mi2977-982842-932842-933333(Top 13%)3163(Top 21%)3163(Top 60%)
Half13.11 mi0.68 mi2965+122832+102832+102992(Top 11%)2867(Top 19%)2867(Top 54%)
25K15.53 mi2.42 mi2977-122844-122844-123252(Top 12%)3100(Top 20%)3100(Top 59%)
30K18.64 mi3.11 mi3766-7893554-7103554-7106849(Top 26%)5959(Top 39%)5959(Top 113%)
20M20.00 mi1.36 mi4443-6774148-5944148-59411110(Top 42%)8297(Top 55%)8297(Top 157%)
21M21.00 mi1.00 mi4680-2374359-2114359-2118060(Top 30%)6497(Top 43%)6497(Top 123%)
35K21.75 mi0.75 mi4852-1724506-1474506-1479341(Top 35%)7246(Top 48%)7246(Top 137%)
23M23.00 mi1.25 mi5122-2704711-2054711-20510360(Top 39%)7650(Top 50%)7650(Top 145%)
24M24.00 mi1.00 mi5369-2474917-2064917-20613122(Top 49%)8898(Top 59%)8898(Top 168%)
40K24.85 mi0.85 mi5638-2695123-2065123-20615615(Top 59%)9941(Top 66%)9941(Top 188%)
25.2M25.20 mi0.35 mi5706-685165-425165-4212053(Top 45%)8249(Top 54%)8249(Top 156%)
Finish26.22 mi1.02 mi5874-1685288-1235288-12312296(Top 46%)8410(Top 55%)8410(Top 159%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 12%
×21stories
+97ft-345ft

Overall

3292

Males

3127

M18-39

3127

5K→10K

3.1 - 6.2 mi

Top 12%
×5stories
+79ft-138ft

Overall

3176

Males

3028

M18-39

3028

10K→15K

6.2 - 9.3 mi

Top 12%
×3stories
+67ft-78ft

Overall

3292

Males

3127

M18-39

3127

15K→20K

9.3 - 12.4 mi

Top 13%
×5stories
+106ft-86ft

Overall

3333

Males

3163

M18-39

3163

20K→Half

12.4 - 13.1 mi

Top 11%
×2stories
+19ft-37ft

Overall

2992

Males

2867

M18-39

2867

Half→25K

13.1 - 15.5 mi

Top 12%
×4stories
+66ft-88ft

Overall

3252

Males

3100

M18-39

3100

25K→30K

15.5 - 18.6 mi

Top 26%
×9stories
+181ft-148ft

Overall

6849

Males

5959

M18-39

5959

30K→20M

18.6 - 20.0 mi

Top 42%
×5stories
+64ft-50ft

Overall

11110

Males

8297

M18-39

8297

20M→21M

20.0 - 21.0 mi

Top 30%
×8stories
+106ft-24ft

Overall

8060

Males

6497

M18-39

6497

21M→35K

21.0 - 21.8 mi

Top 35%
×7stories
+17ft-86ft

Overall

9341

Males

7246

M18-39

7246

35K→23M

21.8 - 23.0 mi

Top 39%
×5stories
+23ft-63ft

Overall

10360

Males

7650

M18-39

7650

23M→24M

23.0 - 24.0 mi

Top 49%
×6stories
+12ft-82ft

Overall

13122

Males

8898

M18-39

8898

24M→40K

24.0 - 24.9 mi

Top 59%
×1story
+6ft-20ft

Overall

15615

Males

9941

M18-39

9941

40K→25.2M

24.9 - 25.2 mi

Top 45%
×1story
+13ft-16ft

Overall

12053

Males

8249

M18-39

8249

25.2M→Finish

25.2 - 26.2 mi

Top 46%
×2stories
+22ft-21ft

Overall

12296

Males

8410

M18-39

8410

Passing Analysis

Category:
Athletes Passed
304
Passed By
3796
Net Change
-3492
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2382
5K → 10K38374-336#2382#2718
10K → 15K39200-161#2718#2879
15K → 20K39137-98#2879#2977
20K → Half2614+12#2977#2965
Half → 25K6072-12#2965#2977
25K → 30K5794-789#2977#3766
30K → 20M4681-677#3766#4443
20M → 21M20257-237#4443#4680
21M → 35K13185-172#4680#4852
35K → 23M20290-270#4852#5122
23M → 24M11258-247#5122#5369
24M → 40K6275-269#5369#5638
40K → 25.2M472-68#5638#5706
25.2M → Finish19187-168#5706#5874
TOTALS3043796-3492
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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