Boston Marathon logo
BOSTON MARATHON 2023

Michael Shasberger

Bib: 19698•M

VA

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
Top 10%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:47
Rank: #16130
Start → 5K
25:47 | 8:18/mi
10K· 6.21 mi
50:42
Rank: #15527 (+603)
5K → 10K
24:55 | 8:01/mi
15K· 9.32 mi
1:15:35
Rank: #15177 (+350)
10K → 15K
24:53 | 8:01/mi
20K· 12.43 mi
1:41:41
Rank: #15449 (-272)
15K → 20K
26:06 | 8:24/mi
Half· 13.11 mi
1:47:14
Rank: #15453 (-4)
20K → Half
5:33 | 8:08/mi
25K· 15.53 mi
2:07:33
Rank: #15418 (+35)
Half → 25K
20:19 | 8:23/mi
30K· 18.64 mi
2:35:16
Rank: #15672 (-254)
25K → 30K
27:43 | 8:55/mi
20M
2:48:01
Rank: #15912 (-240)
30K → 20M
12:45 | 9:23/mi
21M
2:58:35
Rank: #16221 (-309)
20M → 21M
10:34 | 10:34/mi
35K· 21.75 mi
3:05:56
Rank: #16446 (-225)
21M → 35K
7:21 | 9:49/mi
23M
3:18:38
Rank: #16801 (-355)
35K → 23M
12:42 | 10:09/mi
24M
3:28:48
Rank: #17090 (-289)
23M → 24M
10:10 | 10:10/mi
40K· 24.85 mi
3:37:30
Rank: #17300 (-210)
24M → 40K
8:42 | 10:11/mi
25.2M
3:41:28
Rank: #17440 (-140)
40K → 25.2M
3:58 | 11:30/mi
Finish· 26.22 mi
3:51:39
Rank: #17698 (-258)
25.2M → Finish
10:11 | 10:00/mi

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
Time1:47:14
Pace8:11 /mi
2nd Half
Distance13.11 mi
Time2:04:25
Pace9:29 /mi
📊Positive Split: 16.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:3425:478:1825:47
8:18
-
10K
6.21 mi11:42:2950:428:1024:55
8:01
-0:17
15K
9.32 mi12:07:221:15:358:0724:53
8:01
0:00
20K
12.43 mi12:33:281:41:418:1126:06
8:24
+0:23
Half
13.11 mi12:39:011:47:148:115:33
8:08
-0:16
25K
15.53 mi12:59:202:07:338:1320:19
8:23
+0:15
30K
18.64 mi13:27:032:35:168:2027:43
8:55
+0:32
20M
20.00 mi13:39:482:48:018:2412:45
9:23
+0:28
21M
21.00 mi13:50:222:58:358:3010:34
10:34
+1:11
35K
21.75 mi13:57:433:05:568:337:21
9:49
-0:45
23M
23.00 mi14:10:253:18:388:3812:42
10:09
+0:20
24M
24.00 mi14:20:353:28:488:4210:10
10:10
+0:01
40K
24.85 mi14:29:173:37:308:458:42
10:11
+0:01
25.2M
25.20 mi14:33:153:41:288:473:58
11:30
+1:19
Finish
26.22 mi14:43:263:51:398:5010:11
10:00
-1:30

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

8:01 /mi

Average Pace

8:50 /mi

Slowest Pace

11:30 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:07:33

55% of race

Time at Steady Pace

47:49

21% of race

Time at Slower Pace

56:17

24% of race

Average Pace: 8:50 /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 mi11:17:3425:478:1825:47
8:18
#16130
10K
6.21 mi11:42:2950:428:1024:55
8:01
#15527
15K
9.32 mi12:07:221:15:358:0724:53
8:01
#15177
20K
12.43 mi12:33:281:41:418:1126:06
8:24
#15449
Half
13.11 mi12:39:011:47:148:115:33
8:08
#15453
25K
15.53 mi12:59:202:07:338:1320:19
8:23
#15418
30K
18.64 mi13:27:032:35:168:2027:43
8:55
#15672
20M
20.00 mi13:39:482:48:018:2412:45
9:23
#15912
21M
21.00 mi13:50:222:58:358:3010:34
10:34
#16221
35K
21.75 mi13:57:433:05:568:337:21
9:49
#16446
23M
23.00 mi14:10:253:18:388:3812:42
10:09
#16801
24M
24.00 mi14:20:353:28:488:4210:10
10:10
#17090
40K
24.85 mi14:29:173:37:308:458:42
10:11
#17300
25.2M
25.20 mi14:33:153:41:288:473:58
11:30
#17440
Finish
26.22 mi14:43:263:51:398:5010:11
10:00
#17698
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM70-74Seg. OverallSeg. MalesSeg. M70-74
5K3.11 mi3.11 mi16130107481074814453(Top 54%)10089(Top 66%)10089(Top 4737%)
10K6.21 mi3.10 mi15527+60310524+22410524+22414948(Top 56%)10293(Top 68%)10293(Top 4832%)
15K9.32 mi3.11 mi15177+35010392+13210392+13214453(Top 54%)10089(Top 66%)10089(Top 4737%)
20K12.43 mi3.11 mi15449-27210467-7510467-7516247(Top 61%)10735(Top 71%)10735(Top 5040%)
Half13.11 mi0.68 mi15453-410464+310464+315327(Top 58%)10439(Top 69%)10439(Top 4901%)
25K15.53 mi2.42 mi15418+3510423+4110423+4115444(Top 58%)10323(Top 68%)10323(Top 4846%)
30K18.64 mi3.11 mi15672-25410483-6010483-6016765(Top 63%)10816(Top 71%)10816(Top 5078%)
20M20.00 mi1.36 mi15912-24010544-6110544-6118370(Top 69%)11397(Top 75%)11397(Top 5351%)
21M21.00 mi1.00 mi16221-30910651-10710651-10719782(Top 74%)11950(Top 79%)11950(Top 5610%)
35K21.75 mi0.75 mi16446-22510742-9110742-9120806(Top 78%)12384(Top 82%)12384(Top 5814%)
23M23.00 mi1.25 mi16801-35510879-13710879-13720406(Top 77%)12204(Top 80%)12204(Top 5730%)
24M24.00 mi1.00 mi17090-28910974-9510974-9521218(Top 80%)12516(Top 82%)12516(Top 5876%)
40K24.85 mi0.85 mi17300-21011052-7811052-7820419(Top 77%)12107(Top 80%)12107(Top 5684%)
25.2M25.20 mi0.35 mi17440-14011106-5411106-5421531(Top 81%)12622(Top 83%)12622(Top 5926%)
Finish26.22 mi1.02 mi17698-25811203-9711203-9721723(Top 82%)12729(Top 84%)12729(Top 5976%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 54%
×21stories
+97ft-345ft

Overall

14453

Males

10089

M70-74

10089

5K→10K

3.1 - 6.2 mi

Top 56%
×5stories
+79ft-138ft

Overall

14948

Males

10293

M70-74

10293

10K→15K

6.2 - 9.3 mi

Top 54%
×3stories
+67ft-78ft

Overall

14453

Males

10089

M70-74

10089

15K→20K

9.3 - 12.4 mi

Top 61%
×5stories
+106ft-86ft

Overall

16247

Males

10735

M70-74

10735

20K→Half

12.4 - 13.1 mi

Top 58%
×2stories
+19ft-37ft

Overall

15327

Males

10439

M70-74

10439

Half→25K

13.1 - 15.5 mi

Top 58%
×4stories
+66ft-88ft

Overall

15444

Males

10323

M70-74

10323

25K→30K

15.5 - 18.6 mi

Top 63%
×9stories
+181ft-148ft

Overall

16765

Males

10816

M70-74

10816

30K→20M

18.6 - 20.0 mi

Top 69%
×5stories
+64ft-50ft

Overall

18370

Males

11397

M70-74

11397

20M→21M

20.0 - 21.0 mi

Top 74%
×8stories
+106ft-24ft

Overall

19782

Males

11950

M70-74

11950

21M→35K

21.0 - 21.8 mi

Top 78%
×7stories
+17ft-86ft

Overall

20806

Males

12384

M70-74

12384

35K→23M

21.8 - 23.0 mi

Top 77%
×5stories
+23ft-63ft

Overall

20406

Males

12204

M70-74

12204

23M→24M

23.0 - 24.0 mi

Top 80%
×6stories
+12ft-82ft

Overall

21218

Males

12516

M70-74

12516

24M→40K

24.0 - 24.9 mi

Top 77%
×1story
+6ft-20ft

Overall

20419

Males

12107

M70-74

12107

40K→25.2M

24.9 - 25.2 mi

Top 81%
×1story
+13ft-16ft

Overall

21531

Males

12622

M70-74

12622

25.2M→Finish

25.2 - 26.2 mi

Top 82%
×2stories
+22ft-21ft

Overall

21723

Males

12729

M70-74

12729

Passing Analysis

Category:
Athletes Passed
1635
Passed By
3203
Net Change
-1568
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16130
5K → 10K70299+603#16130#15527
10K → 15K40757+350#15527#15177
15K → 20K94366-272#15177#15449
20K → Half3135-4#15449#15453
Half → 25K159124+35#15453#15418
25K → 30K97351-254#15418#15672
30K → 20M40280-240#15672#15912
20M → 21M25334-309#15912#16221
21M → 35K9234-225#16221#16446
35K → 23M23378-355#16446#16801
23M → 24M12301-289#16801#17090
24M → 40K22232-210#17090#17300
40K → 25.2M7147-140#17300#17440
25.2M → Finish7265-258#17440#17698
TOTALS16353203-1568
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

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
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing