Boston Marathon logo
BOSTON MARATHON 2023

Patrick Sheffield

Bib: 13303•M

KY

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 36%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Top 40%
Division (M50-54)
#0 / 2052
Top 38%
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
7:43/mi
23:58
↑ 97↓ 3451.5%
10K· 6.21 mi
7:38/mi
47:41
↑ 79↓ 1380.4%
15K· 9.32 mi
7:33/mi
1:11:07
↑ 67↓ 78
20K· 12.43 mi
7:34/mi
1:34:39
↑ 106↓ 860.1%
Half· 13.11 mi
7:27/mi
1:39:44
↑ 19↓ 370.5%
25K· 15.53 mi
7:36/mi
1:58:09
↑ 66↓ 880.2%
30K· 18.64 mi
7:41/mi
2:22:01
↑ 181↓ 1480.2%
20M
7:42/mi
2:32:29
↑ 64↓ 500.2%
21M
8:15/mi
2:40:44
↑ 106↓ 241.6%
35K· 21.75 mi
7:26/mi
2:46:18
↑ 17↓ 861.7%
23M
7:46/mi
2:56:01
↑ 23↓ 630.6%
24M
7:35/mi
3:03:36
↓ 821.3%
40K· 24.85 mi
8:09/mi
3:10:34
↓ 200.3%
25.2M
8:51/mi
3:13:37
↑ 13↓ 160.2%
Finish· 26.22 mi
7:46/mi
3:21:32
↑ 22↓ 21

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
Time1:39:44
Pace7:36 /mi
2nd Half
Distance13.11 mi
Time1:41:48
Pace7:46 /mi
📊Positive Split: 2.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:4223:587:4323:58
7:43
-
10K
6.21 mi11:16:2547:417:4023:43
7:38
-0:05
15K
9.32 mi11:39:511:11:077:3823:26
7:33
-0:05
20K
12.43 mi12:03:231:34:397:3723:32
7:34
+0:01
Half
13.11 mi12:08:281:39:447:365:05
7:27
-0:07
25K
15.53 mi12:26:531:58:097:3618:25
7:36
+0:09
30K
18.64 mi12:50:452:22:017:3723:52
7:41
+0:05
20M
20.00 mi13:01:132:32:297:3710:28
7:42
+0:01
21M
21.00 mi13:09:282:40:447:398:15
8:15
+0:33
35K
21.75 mi13:15:022:46:187:395:34
7:26
-0:49
23M
23.00 mi13:24:452:56:017:399:43
7:46
+0:20
24M
24.00 mi13:32:203:03:367:397:35
7:35
-0:11
40K
24.85 mi13:39:183:10:347:406:58
8:09
+0:34
25.2M
25.20 mi13:42:213:13:377:413:03
8:51
+0:42
Finish
26.22 mi13:50:163:21:327:427:55
7:46
-1:05

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

7:26 /mi

Average Pace

7:42 /mi

Slowest Pace

8:51 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:10:14

94% of race

Time at Steady Pace

8:15

4% of race

Time at Slower Pace

3:03

2% of race

Average Pace: 7:41 /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 mi10:52:4223:587:4323:58
7:43
#11556
10K
6.21 mi11:16:2547:417:4023:43
7:38
#11551
15K
9.32 mi11:39:511:11:077:3823:26
7:33
#11187
20K
12.43 mi12:03:231:34:397:3723:32
7:34
#10836
Half
13.11 mi12:08:281:39:447:365:05
7:27
#10780
25K
15.53 mi12:26:531:58:097:3618:25
7:36
#10526
30K
18.64 mi12:50:452:22:017:3723:52
7:41
#10117
20M
20.00 mi13:01:132:32:297:3710:28
7:42
#9929
21M
21.00 mi13:09:282:40:447:398:15
8:15
#9839
35K
21.75 mi13:15:022:46:187:395:34
7:26
#9763
23M
23.00 mi13:24:452:56:017:399:43
7:46
#9630
24M
24.00 mi13:32:203:03:367:397:35
7:35
#9553
40K
24.85 mi13:39:183:10:347:406:58
8:09
#9557
25.2M
25.20 mi13:42:213:13:377:413:03
8:51
#9582
Finish
26.22 mi13:50:163:21:327:427:55
7:46
#9593
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi115568918891810516(Top 40%)8414(Top 55%)8414(Top 410%)
10K6.21 mi3.10 mi11551+58901+178901+1711613(Top 44%)8934(Top 59%)8934(Top 435%)
15K9.32 mi3.11 mi11187+3648740+1618740+16110516(Top 40%)8414(Top 55%)8414(Top 410%)
20K12.43 mi3.11 mi10836+3518560+1808560+1809888(Top 37%)8010(Top 53%)8010(Top 390%)
Half13.11 mi0.68 mi10780+568530+308530+309771(Top 37%)7964(Top 52%)7964(Top 388%)
25K15.53 mi2.42 mi10526+2548403+1278403+1279498(Top 36%)7709(Top 51%)7709(Top 376%)
30K18.64 mi3.11 mi10117+4098157+2468157+2468517(Top 32%)6994(Top 46%)6994(Top 341%)
20M20.00 mi1.36 mi9929+1888028+1298028+1298204(Top 31%)6727(Top 44%)6727(Top 328%)
21M21.00 mi1.00 mi9839+907953+757953+758893(Top 33%)7007(Top 46%)7007(Top 341%)
35K21.75 mi0.75 mi9763+767899+547899+548082(Top 30%)6553(Top 43%)6553(Top 319%)
23M23.00 mi1.25 mi9630+1337785+1147785+1148145(Top 31%)6493(Top 43%)6493(Top 316%)
24M24.00 mi1.00 mi9553+777720+657720+658281(Top 31%)6486(Top 43%)6486(Top 316%)
40K24.85 mi0.85 mi9557-47696+247696+2410989(Top 41%)7828(Top 52%)7828(Top 381%)
25.2M25.20 mi0.35 mi9582-257694+27694+211506(Top 43%)8020(Top 53%)8020(Top 391%)
Finish26.22 mi1.02 mi9593-117667+277667+2710420(Top 39%)7504(Top 49%)7504(Top 366%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 40%
×21story building
+97ft-345ft

Overall

10516

Males

8414

M50-54

8414

5K→10K

3.1 - 6.2 mi

Top 44%
×5story building
+79ft-138ft

Overall

11613

Males

8934

M50-54

8934

10K→15K

6.2 - 9.3 mi

Top 40%
×3story building
+67ft-78ft

Overall

10516

Males

8414

M50-54

8414

15K→20K

9.3 - 12.4 mi

Top 37%
×5story building
+106ft-86ft

Overall

9888

Males

8010

M50-54

8010

20K→Half

12.4 - 13.1 mi

Top 37%
×2story building
+19ft-37ft

Overall

9771

Males

7964

M50-54

7964

Half→25K

13.1 - 15.5 mi

Top 36%
×4story building
+66ft-88ft

Overall

9498

Males

7709

M50-54

7709

25K→30K

15.5 - 18.6 mi

Top 32%
×9story building
+181ft-148ft

Overall

8517

Males

6994

M50-54

6994

30K→20M

18.6 - 20.0 mi

Top 31%
×5story building
+64ft-50ft

Overall

8204

Males

6727

M50-54

6727

20M→21M

20.0 - 21.0 mi

Top 33%
×8story building
+106ft-24ft

Overall

8893

Males

7007

M50-54

7007

21M→35K

21.0 - 21.8 mi

Top 30%
×7story building
+17ft-86ft

Overall

8082

Males

6553

M50-54

6553

35K→23M

21.8 - 23.0 mi

Top 31%
×5story building
+23ft-63ft

Overall

8145

Males

6493

M50-54

6493

23M→24M

23.0 - 24.0 mi

Top 31%
×6story building
+12ft-82ft

Overall

8281

Males

6486

M50-54

6486

24M→40K

24.0 - 24.9 mi

Top 41%
×1story
+6ft-20ft

Overall

10989

Males

7828

M50-54

7828

40K→25.2M

24.9 - 25.2 mi

Top 43%
×1story
+13ft-16ft

Overall

11506

Males

8020

M50-54

8020

25.2M→Finish

25.2 - 26.2 mi

Top 39%
×2story building
+22ft-21ft

Overall

10420

Males

7504

M50-54

7504

Passing Analysis

Category:
Athletes Passed
2685*
Passed By
722
Net Change
+1963
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11556
5K → 10K299294+5#11556#11551
10K → 15K41753+364#11551#11187
15K → 20K37322+351#11187#10836
20K → Half659+56#10836#10780
Half → 25K27117+254#10780#10526
25K → 30K429*20+409#10526#10117
30K → 20M204*16+188#10117#9929
20M → 21M12939+90#9929#9839
21M → 35K848+76#9839#9763
35K → 23M16431+133#9763#9630
23M → 24M9922+77#9630#9553
24M → 40K57*61-4#9553#9557
40K → 25.2M2752-25#9557#9582
25.2M → Finish6778-11#9582#9593
TOTALS2685*722+1963

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

Passing Visuals

Category:
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

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing