Boston Marathon logo
BOSTON MARATHON 2023

Tristan Shepard

Bib: 24739•M

MA

0:00
0:00
/ mi
Be the first to cheer!
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
29:34
Rank: #22139
Start → 5K
29:34 | 9:31/mi
10K· 6.21 mi
57:50
Rank: #21754 (+385)
5K → 10K
28:16 | 9:06/mi
15K· 9.32 mi
1:27:27
Rank: #21934 (-180)
10K → 15K
29:37 | 9:32/mi
20K· 12.43 mi
2:00:02
Rank: #22578 (-644)
15K → 20K
32:35 | 10:29/mi
Half· 13.11 mi
2:07:05
Rank: #22665 (-87)
20K → Half
7:03 | 10:20/mi
25K· 15.53 mi
2:34:18
Rank: #23027 (-362)
Half → 25K
27:13 | 11:14/mi
30K· 18.64 mi
3:11:01
Rank: #23335 (-308)
25K → 30K
36:43 | 11:49/mi
20M
3:26:31
Rank: #23338 (-3)
30K → 20M
15:30 | 11:24/mi
21M
3:39:36
Rank: #23404 (-66)
20M → 21M
13:05 | 13:05/mi
35K· 21.75 mi
3:48:18
Rank: #23448 (-44)
21M → 35K
8:42 | 11:38/mi
23M
4:02:53
Rank: #23464 (-16)
35K → 23M
14:35 | 11:39/mi
24M
4:14:24
Rank: #23501 (-37)
23M → 24M
11:31 | 11:31/mi
40K· 24.85 mi
4:24:19
Rank: #23496 (+5)
24M → 40K
9:55 | 11:36/mi
25.2M
4:28:45
Rank: #23507 (-11)
40K → 25.2M
4:26 | 12:51/mi
Finish· 26.22 mi
4:40:56
Rank: #23612 (-105)
25.2M → Finish
12:11 | 11:57/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
Time2:07:05
Pace9:42 /mi
2nd Half
Distance13.11 mi
Time2:33:51
Pace11:44 /mi
📊Positive Split: 21.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:45:1029:349:3129:34
9:31
-
10K
6.21 mi12:13:2657:509:1828:16
9:06
-0:25
15K
9.32 mi12:43:031:27:279:2329:37
9:32
+0:26
20K
12.43 mi13:15:382:00:029:4032:35
10:29
+0:57
Half
13.11 mi13:22:412:07:059:427:03
10:20
-0:09
25K
15.53 mi13:49:542:34:189:5627:13
11:14
+0:54
30K
18.64 mi14:26:373:11:0110:1536:43
11:49
+0:35
20M
20.00 mi14:42:073:26:3110:2015:30
11:24
-0:25
21M
21.00 mi14:55:123:39:3610:2713:05
13:05
+1:41
35K
21.75 mi15:03:543:48:1810:308:42
11:38
-1:27
23M
23.00 mi15:18:294:02:5310:3414:35
11:39
+0:01
24M
24.00 mi15:30:004:14:2410:3611:31
11:31
-0:08
40K
24.85 mi15:39:554:24:1910:389:55
11:36
+0:05
25.2M
25.20 mi15:44:214:28:4510:404:26
12:51
+1:15
Finish
26.22 mi15:56:324:40:5610:4312:11
11:57
-0:54

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

9:06 /mi

Average Pace

10:43 /mi

Slowest Pace

13:05 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:07:05

45% of race

Time at Steady Pace

2:16:20

49% of race

Time at Slower Pace

17:31

6% of race

Average Pace: 10:43 /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 mi11:45:1029:349:3129:34
9:31
#22139
10K
6.21 mi12:13:2657:509:1828:16
9:06
#21754
15K
9.32 mi12:43:031:27:279:2329:37
9:32
#21934
20K
12.43 mi13:15:382:00:029:4032:35
10:29
#22578
Half
13.11 mi13:22:412:07:059:427:03
10:20
#22665
25K
15.53 mi13:49:542:34:189:5627:13
11:14
#23027
30K
18.64 mi14:26:373:11:0110:1536:43
11:49
#23335
20M
20.00 mi14:42:073:26:3110:2015:30
11:24
#23338
21M
21.00 mi14:55:123:39:3610:2713:05
13:05
#23404
35K
21.75 mi15:03:543:48:1810:308:42
11:38
#23448
23M
23.00 mi15:18:294:02:5310:3414:35
11:39
#23464
24M
24.00 mi15:30:004:14:2410:3611:31
11:31
#23501
40K
24.85 mi15:39:554:24:1910:389:55
11:36
#23496
25.2M
25.20 mi15:44:214:28:4510:404:26
12:51
#23507
Finish
26.22 mi15:56:324:40:5610:4312:11
11:57
#23612
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi22139131741317422348(Top 84%)13348(Top 88%)13348(Top 253%)
10K6.21 mi3.10 mi21754+38513015+15913015+15921254(Top 80%)12818(Top 84%)12818(Top 243%)
15K9.32 mi3.11 mi21934-18013111-9613111-9622348(Top 84%)13348(Top 88%)13348(Top 253%)
20K12.43 mi3.11 mi22578-64413431-32013431-32023807(Top 89%)13983(Top 92%)13983(Top 265%)
Half13.11 mi0.68 mi22665-8713468-3713468-3723895(Top 90%)14014(Top 92%)14014(Top 265%)
25K15.53 mi2.42 mi23027-36213637-16913637-16924304(Top 91%)14163(Top 93%)14163(Top 268%)
30K18.64 mi3.11 mi23335-30813756-11913756-11924292(Top 91%)14101(Top 93%)14101(Top 267%)
20M20.00 mi1.36 mi23338-313749+713749+723367(Top 88%)13629(Top 90%)13629(Top 258%)
21M21.00 mi1.00 mi23404-6613772-2313772-2324175(Top 91%)13965(Top 92%)13965(Top 264%)
35K21.75 mi0.75 mi23448-4413786-1413786-1424254(Top 91%)13972(Top 92%)13972(Top 264%)
23M23.00 mi1.25 mi23464-1613779+713779+723498(Top 88%)13625(Top 90%)13625(Top 258%)
24M24.00 mi1.00 mi23501-3713793-1413793-1423887(Top 90%)13763(Top 91%)13763(Top 260%)
40K24.85 mi0.85 mi23496+513782+1113782+1123354(Top 88%)13479(Top 89%)13479(Top 255%)
25.2M25.20 mi0.35 mi23507-1113780+213780+223781(Top 89%)13678(Top 90%)13678(Top 259%)
Finish26.22 mi1.02 mi23612-10513825-4513825-4525186(Top 95%)14400(Top 95%)14400(Top 272%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 84%
×21stories
+97ft-345ft

Overall

22348

Males

13348

M18-39

13348

5K→10K

3.1 - 6.2 mi

Top 80%
×5stories
+79ft-138ft

Overall

21254

Males

12818

M18-39

12818

10K→15K

6.2 - 9.3 mi

Top 84%
×3stories
+67ft-78ft

Overall

22348

Males

13348

M18-39

13348

15K→20K

9.3 - 12.4 mi

Top 89%
×5stories
+106ft-86ft

Overall

23807

Males

13983

M18-39

13983

20K→Half

12.4 - 13.1 mi

Top 90%
×2stories
+19ft-37ft

Overall

23895

Males

14014

M18-39

14014

Half→25K

13.1 - 15.5 mi

Top 91%
×4stories
+66ft-88ft

Overall

24304

Males

14163

M18-39

14163

25K→30K

15.5 - 18.6 mi

Top 91%
×9stories
+181ft-148ft

Overall

24292

Males

14101

M18-39

14101

30K→20M

18.6 - 20.0 mi

Top 88%
×5stories
+64ft-50ft

Overall

23367

Males

13629

M18-39

13629

20M→21M

20.0 - 21.0 mi

Top 91%
×8stories
+106ft-24ft

Overall

24175

Males

13965

M18-39

13965

21M→35K

21.0 - 21.8 mi

Top 91%
×7stories
+17ft-86ft

Overall

24254

Males

13972

M18-39

13972

35K→23M

21.8 - 23.0 mi

Top 88%
×5stories
+23ft-63ft

Overall

23498

Males

13625

M18-39

13625

23M→24M

23.0 - 24.0 mi

Top 90%
×6stories
+12ft-82ft

Overall

23887

Males

13763

M18-39

13763

24M→40K

24.0 - 24.9 mi

Top 88%
×1story
+6ft-20ft

Overall

23354

Males

13479

M18-39

13479

40K→25.2M

24.9 - 25.2 mi

Top 89%
×1story
+13ft-16ft

Overall

23781

Males

13678

M18-39

13678

25.2M→Finish

25.2 - 26.2 mi

Top 95%
×2stories
+22ft-21ft

Overall

25186

Males

14400

M18-39

14400

Passing Analysis

Category:
Athletes Passed
893
Passed By
2366
Net Change
-1473
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22139
5K → 10K496111+385#22139#21754
10K → 15K102282-180#21754#21934
15K → 20K24668-644#21934#22578
20K → Half794-87#22578#22665
Half → 25K29391-362#22665#23027
25K → 30K42350-308#23027#23335
30K → 20M4043-3#23335#23338
20M → 21M2490-66#23338#23404
21M → 35K1458-44#23404#23448
35K → 23M4460-16#23448#23464
23M → 24M1451-37#23464#23501
24M → 40K3732+5#23501#23496
40K → 25.2M1021-11#23496#23507
25.2M → Finish10115-105#23507#23612
TOTALS8932366-1473
📊

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