Boston Marathon logo
BOSTON MARATHON 2023

William Clark

Bib: 13316•M

MI

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 46%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M50-54)
#0 / 2052
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
7:58/mi
24:46
↑ 97↓ 3451.5%
10K· 6.21 mi
7:56/mi
49:24
↑ 79↓ 1380.4%
15K· 9.32 mi
7:57/mi
1:14:07
↑ 67↓ 78
20K· 12.43 mi
8:00/mi
1:38:57
↑ 106↓ 860.1%
Half· 13.11 mi
7:55/mi
1:44:21
↑ 19↓ 370.5%
25K· 15.53 mi
8:05/mi
2:03:56
↑ 66↓ 880.2%
30K· 18.64 mi
8:14/mi
2:29:30
↑ 181↓ 1480.2%
20M
8:06/mi
2:40:30
↑ 64↓ 500.2%
21M
8:20/mi
2:48:50
↑ 106↓ 241.6%
35K· 21.75 mi
7:55/mi
2:54:45
↑ 17↓ 861.7%
23M
7:58/mi
3:04:44
↑ 23↓ 630.6%
24M
7:48/mi
3:12:32
↓ 821.3%
40K· 24.85 mi
7:47/mi
3:19:11
↓ 200.3%
25.2M
8:22/mi
3:22:04
↑ 13↓ 160.2%
Finish· 26.22 mi
7:38/mi
3:29:51
↑ 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
Time1:44:21
Pace7:58 /mi
2nd Half
Distance13.11 mi
Time1:45:30
Pace8:03 /mi
📊Positive Split: 1.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:4724:467:5824:46
7:58
-
10K
6.21 mi11:17:2549:247:5724:38
7:56
-0:02
15K
9.32 mi11:42:081:14:077:5724:43
7:57
+0:01
20K
12.43 mi12:06:581:38:577:5824:50
8:00
+0:03
Half
13.11 mi12:12:221:44:217:585:24
7:55
-0:05
25K
15.53 mi12:31:572:03:567:5919:35
8:05
+0:10
30K
18.64 mi12:57:312:29:308:0125:34
8:14
+0:09
20M
20.00 mi13:08:312:40:308:0111:00
8:06
-0:08
21M
21.00 mi13:16:512:48:508:028:20
8:20
+0:14
35K
21.75 mi13:22:462:54:458:025:55
7:55
-0:25
23M
23.00 mi13:32:453:04:448:029:59
7:58
+0:03
24M
24.00 mi13:40:333:12:328:017:48
7:48
-0:10
40K
24.85 mi13:47:123:19:118:016:39
7:47
-0:01
25.2M
25.20 mi13:50:053:22:048:012:53
8:22
+0:35
Finish
26.22 mi13:57:523:29:518:017:47
7:38
-0:44

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

7:38 /mi

Average Pace

8:01 /mi

Slowest Pace

8:22 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:22:29

68% of race

Time at Steady Pace

1:07:22

32% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:00 /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 mi10:52:4724:467:5824:46
7:58
#13796
10K
6.21 mi11:17:2549:247:5724:38
7:56
#13982
15K
9.32 mi11:42:081:14:077:5724:43
7:57
#13979
20K
12.43 mi12:06:581:38:577:5824:50
8:00
#13801
Half
13.11 mi12:12:221:44:217:585:24
7:55
#13782
25K
15.53 mi12:31:572:03:567:5919:35
8:05
#13696
30K
18.64 mi12:57:312:29:308:0125:34
8:14
#13443
20M
20.00 mi13:08:312:40:308:0111:00
8:06
#13240
21M
21.00 mi13:16:512:48:508:028:20
8:20
#12978
35K
21.75 mi13:22:462:54:458:025:55
7:55
#12906
23M
23.00 mi13:32:453:04:448:029:59
7:58
#12695
24M
24.00 mi13:40:333:12:328:017:48
7:48
#12551
40K
24.85 mi13:47:123:19:118:016:39
7:47
#12400
25.2M
25.20 mi13:50:053:22:048:012:53
8:22
#12332
Finish
26.22 mi13:57:523:29:518:017:47
7:38
#12209
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi137969877987714025(Top 53%)9905(Top 65%)9905(Top 483%)
10K6.21 mi3.10 mi13982-1869929-529929-5214217(Top 53%)10007(Top 66%)10007(Top 488%)
15K9.32 mi3.11 mi13979+39914+159914+1514025(Top 53%)9905(Top 65%)9905(Top 483%)
20K12.43 mi3.11 mi13801+1789821+939821+9313346(Top 50%)9597(Top 63%)9597(Top 468%)
Half13.11 mi0.68 mi13782+199816+59816+513612(Top 51%)9722(Top 64%)9722(Top 474%)
25K15.53 mi2.42 mi13696+869754+629754+6213332(Top 50%)9491(Top 63%)9491(Top 463%)
30K18.64 mi3.11 mi13443+2539617+1379617+13712527(Top 47%)9028(Top 59%)9028(Top 440%)
20M20.00 mi1.36 mi13240+2039521+969521+9610974(Top 41%)8246(Top 54%)8246(Top 402%)
21M21.00 mi1.00 mi12978+2629384+1379384+1379426(Top 35%)7313(Top 48%)7313(Top 356%)
35K21.75 mi0.75 mi12906+729337+479337+4711434(Top 43%)8324(Top 55%)8324(Top 406%)
23M23.00 mi1.25 mi12695+2119232+1059232+1059573(Top 36%)7277(Top 48%)7277(Top 355%)
24M24.00 mi1.00 mi12551+1449151+819151+819794(Top 37%)7300(Top 48%)7300(Top 356%)
40K24.85 mi0.85 mi12400+1519071+809071+808534(Top 32%)6586(Top 43%)6586(Top 321%)
25.2M25.20 mi0.35 mi12332+689026+459026+458671(Top 33%)6572(Top 43%)6572(Top 320%)
Finish26.22 mi1.02 mi12209+1238954+728954+729543(Top 36%)7049(Top 46%)7049(Top 344%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 53%
×21story building
+97ft-345ft

Overall

14025

Males

9905

M50-54

9905

5K→10K

3.1 - 6.2 mi

Top 53%
×5story building
+79ft-138ft

Overall

14217

Males

10007

M50-54

10007

10K→15K

6.2 - 9.3 mi

Top 53%
×3story building
+67ft-78ft

Overall

14025

Males

9905

M50-54

9905

15K→20K

9.3 - 12.4 mi

Top 50%
×5story building
+106ft-86ft

Overall

13346

Males

9597

M50-54

9597

20K→Half

12.4 - 13.1 mi

Top 51%
×2story building
+19ft-37ft

Overall

13612

Males

9722

M50-54

9722

Half→25K

13.1 - 15.5 mi

Top 50%
×4story building
+66ft-88ft

Overall

13332

Males

9491

M50-54

9491

25K→30K

15.5 - 18.6 mi

Top 47%
×9story building
+181ft-148ft

Overall

12527

Males

9028

M50-54

9028

30K→20M

18.6 - 20.0 mi

Top 41%
×5story building
+64ft-50ft

Overall

10974

Males

8246

M50-54

8246

20M→21M

20.0 - 21.0 mi

Top 35%
×8story building
+106ft-24ft

Overall

9426

Males

7313

M50-54

7313

21M→35K

21.0 - 21.8 mi

Top 43%
×7story building
+17ft-86ft

Overall

11434

Males

8324

M50-54

8324

35K→23M

21.8 - 23.0 mi

Top 36%
×5story building
+23ft-63ft

Overall

9573

Males

7277

M50-54

7277

23M→24M

23.0 - 24.0 mi

Top 37%
×6story building
+12ft-82ft

Overall

9794

Males

7300

M50-54

7300

24M→40K

24.0 - 24.9 mi

Top 32%
×1story
+6ft-20ft

Overall

8534

Males

6586

M50-54

6586

40K→25.2M

24.9 - 25.2 mi

Top 33%
×1story
+13ft-16ft

Overall

8671

Males

6572

M50-54

6572

25.2M→Finish

25.2 - 26.2 mi

Top 36%
×2story building
+22ft-21ft

Overall

9543

Males

7049

M50-54

7049

Passing Analysis

Category:
Athletes Passed
2535
Passed By
948
Net Change
+1587
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13796
5K → 10K205391-186#13796#13982
10K → 15K194191+3#13982#13979
15K → 20K26486+178#13979#13801
20K → Half3819+19#13801#13782
Half → 25K18195+86#13782#13696
25K → 30K32370+253#13696#13443
30K → 20M21310+203#13443#13240
20M → 21M2708+262#13240#12978
21M → 35K8513+72#12978#12906
35K → 23M2209+211#12906#12695
23M → 24M15915+144#12695#12551
24M → 40K1598+151#12551#12400
40K → 25.2M746+68#12400#12332
25.2M → Finish15027+123#12332#12209
TOTALS2535948+1587
📊

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
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing