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BOSTON MARATHON 2023

Jason Bass

Bib: 8306•M

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Overall
#0 / 26622
Gender (Male)
#0 / 15176
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
22:21
Rank: #7461
Start → 5K
22:21 | 7:12/mi
10K· 6.21 mi
46:50
Rank: #10364 (-2903)
5K → 10K
24:29 | 7:53/mi
15K· 9.32 mi
1:12:16
Rank: #12244 (-1880)
10K → 15K
25:26 | 8:11/mi
20K· 12.43 mi
1:39:10
Rank: #13936 (-1692)
15K → 20K
26:54 | 8:39/mi
Half· 13.11 mi
1:44:46
Rank: #14052 (-116)
20K → Half
5:36 | 8:12/mi
25K· 15.53 mi
2:06:10
Rank: #14796 (-744)
Half → 25K
21:24 | 8:50/mi
30K· 18.64 mi
2:35:42
Rank: #15827 (-1031)
25K → 30K
29:32 | 9:30/mi
20M
2:48:59
Rank: #16210 (-383)
30K → 20M
13:17 | 9:46/mi
21M
2:59:41
Rank: #16535 (-325)
20M → 21M
10:42 | 10:42/mi
35K· 21.75 mi
3:07:11
Rank: #16793 (-258)
21M → 35K
7:30 | 10:01/mi
23M
3:19:11
Rank: #16937 (-144)
35K → 23M
12:00 | 9:35/mi
24M
3:28:39
Rank: #17051 (-114)
23M → 24M
9:28 | 9:28/mi
40K· 24.85 mi
3:36:44
Rank: #17108 (-57)
24M → 40K
8:05 | 9:27/mi
25.2M
3:40:17
Rank: #17155 (-47)
40K → 25.2M
3:33 | 10:18/mi
Finish· 26.22 mi
3:49:16
Rank: #17171 (-16)
25.2M → Finish
8:59 | 8:49/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:44:46
Pace7:59 /mi
2nd Half
Distance13.11 mi
Time2:04:30
Pace9:30 /mi
📊Positive Split: 18.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:47:3622:217:1222:21
7:12
-
10K
6.21 mi11:12:0546:507:3224:29
7:53
+0:41
15K
9.32 mi11:37:311:12:167:4525:26
8:11
+0:18
20K
12.43 mi12:04:251:39:107:5926:54
8:39
+0:28
Half
13.11 mi12:10:011:44:467:595:36
8:12
-0:27
25K
15.53 mi12:31:252:06:108:0721:24
8:50
+0:38
30K
18.64 mi13:00:572:35:428:2129:32
9:30
+0:40
20M
20.00 mi13:14:142:48:598:2713:17
9:46
+0:16
21M
21.00 mi13:24:562:59:418:3310:42
10:42
+0:56
35K
21.75 mi13:32:263:07:118:367:30
10:01
-0:41
23M
23.00 mi13:44:263:19:118:4012:00
9:35
-0:26
24M
24.00 mi13:53:543:28:398:429:28
9:28
-0:07
40K
24.85 mi14:01:593:36:448:438:05
9:27
-0:01
25.2M
25.20 mi14:05:323:40:178:443:33
10:18
+0:51
Finish
26.22 mi14:14:313:49:168:458:59
8:49
-1:29

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

7:12 /mi

Average Pace

8:45 /mi

Slowest Pace

10:42 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:15:09

59% of race

Time at Steady Pace

1:12:22

32% of race

Time at Slower Pace

21:45

9% of race

Average Pace: 8:45 /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 mi10:47:3622:217:1222:21
7:12
#7461
10K
6.21 mi11:12:0546:507:3224:29
7:53
#10364
15K
9.32 mi11:37:311:12:167:4525:26
8:11
#12244
20K
12.43 mi12:04:251:39:107:5926:54
8:39
#13936
Half
13.11 mi12:10:011:44:467:595:36
8:12
#14052
25K
15.53 mi12:31:252:06:108:0721:24
8:50
#14796
30K
18.64 mi13:00:572:35:428:2129:32
9:30
#15827
20M
20.00 mi13:14:142:48:598:2713:17
9:46
#16210
21M
21.00 mi13:24:562:59:418:3310:42
10:42
#16535
35K
21.75 mi13:32:263:07:118:367:30
10:01
#16793
23M
23.00 mi13:44:263:19:118:4012:00
9:35
#16937
24M
24.00 mi13:53:543:28:398:429:28
9:28
#17051
40K
24.85 mi14:01:593:36:448:438:05
9:27
#17108
25.2M
25.20 mi14:05:323:40:178:443:33
10:18
#17155
Finish
26.22 mi14:14:313:49:168:458:59
8:49
#17171
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi74616622662215753(Top 59%)10597(Top 70%)10597(Top 201%)
10K6.21 mi3.10 mi10364-29038345-17238345-172313806(Top 52%)9864(Top 65%)9864(Top 187%)
15K9.32 mi3.11 mi12244-18809198-8539198-85315753(Top 59%)10597(Top 70%)10597(Top 201%)
20K12.43 mi3.11 mi13936-16929873-6759873-67517844(Top 67%)11401(Top 75%)11401(Top 216%)
Half13.11 mi0.68 mi14052-1169924-519924-5115843(Top 60%)10631(Top 70%)10631(Top 201%)
25K15.53 mi2.42 mi14796-74410195-27110195-27118080(Top 68%)11461(Top 76%)11461(Top 217%)
30K18.64 mi3.11 mi15827-103110539-34410539-34419453(Top 73%)11986(Top 79%)11986(Top 227%)
20M20.00 mi1.36 mi16210-38310666-12710666-12719762(Top 74%)12005(Top 79%)12005(Top 227%)
21M21.00 mi1.00 mi16535-32510786-12010786-12020132(Top 76%)12109(Top 80%)12109(Top 229%)
35K21.75 mi0.75 mi16793-25810899-11310899-11321310(Top 80%)12623(Top 83%)12623(Top 239%)
23M23.00 mi1.25 mi16937-14410933-3410933-3418647(Top 70%)11410(Top 75%)11410(Top 216%)
24M24.00 mi1.00 mi17051-11410956-2310956-2319085(Top 72%)11566(Top 76%)11566(Top 219%)
40K24.85 mi0.85 mi17108-5710967-1110967-1118162(Top 68%)11108(Top 73%)11108(Top 210%)
25.2M25.20 mi0.35 mi17155-4710984-1710984-1718415(Top 69%)11207(Top 74%)11207(Top 212%)
Finish26.22 mi1.02 mi17171-1610985-110985-117095(Top 64%)10652(Top 70%)10652(Top 202%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 59%
×21stories
+97ft-345ft

Overall

15753

Males

10597

M18-39

10597

5K→10K

3.1 - 6.2 mi

Top 52%
×5stories
+79ft-138ft

Overall

13806

Males

9864

M18-39

9864

10K→15K

6.2 - 9.3 mi

Top 59%
×3stories
+67ft-78ft

Overall

15753

Males

10597

M18-39

10597

15K→20K

9.3 - 12.4 mi

Top 67%
×5stories
+106ft-86ft

Overall

17844

Males

11401

M18-39

11401

20K→Half

12.4 - 13.1 mi

Top 60%
×2stories
+19ft-37ft

Overall

15843

Males

10631

M18-39

10631

Half→25K

13.1 - 15.5 mi

Top 68%
×4stories
+66ft-88ft

Overall

18080

Males

11461

M18-39

11461

25K→30K

15.5 - 18.6 mi

Top 73%
×9stories
+181ft-148ft

Overall

19453

Males

11986

M18-39

11986

30K→20M

18.6 - 20.0 mi

Top 74%
×5stories
+64ft-50ft

Overall

19762

Males

12005

M18-39

12005

20M→21M

20.0 - 21.0 mi

Top 76%
×8stories
+106ft-24ft

Overall

20132

Males

12109

M18-39

12109

21M→35K

21.0 - 21.8 mi

Top 80%
×7stories
+17ft-86ft

Overall

21310

Males

12623

M18-39

12623

35K→23M

21.8 - 23.0 mi

Top 70%
×5stories
+23ft-63ft

Overall

18647

Males

11410

M18-39

11410

23M→24M

23.0 - 24.0 mi

Top 72%
×6stories
+12ft-82ft

Overall

19085

Males

11566

M18-39

11566

24M→40K

24.0 - 24.9 mi

Top 68%
×1story
+6ft-20ft

Overall

18162

Males

11108

M18-39

11108

40K→25.2M

24.9 - 25.2 mi

Top 69%
×1story
+13ft-16ft

Overall

18415

Males

11207

M18-39

11207

25.2M→Finish

25.2 - 26.2 mi

Top 64%
×2stories
+22ft-21ft

Overall

17095

Males

10652

M18-39

10652

Passing Analysis

Category:
Athletes Passed
318
Passed By
10027
Net Change
-9710
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7461
5K → 10K42906-2903#7461#10364
10K → 15K81888-1880#10364#12244
15K → 20K101702-1692#12244#13936
20K → Half9125-116#13936#14052
Half → 25K30774-744#14052#14796
25K → 30K201051-1031#14796#15827
30K → 20M25408-383#15827#16210
20M → 21M25350-325#16210#16535
21M → 35K10268-258#16535#16793
35K → 23M44188-144#16793#16937
23M → 24M35149-114#16937#17051
24M → 40K3390-57#17051#17108
40K → 25.2M1360-47#17108#17155
25.2M → Finish5268-16#17155#17171
TOTALS31810027-9710
📊

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