Boston Marathon logo
BOSTON MARATHON 2023

William Bloxham

Bib: 8512•M

CA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 44%
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
21:28
Rank: #5645
Start → 5K
21:28 | 6:55/mi
10K· 6.21 mi
43:56
Rank: #6919 (-1274)
5K → 10K
22:28 | 7:14/mi
15K· 9.32 mi
1:05:46
Rank: #6816 (+103)
10K → 15K
21:50 | 7:02/mi
20K· 12.43 mi
1:29:04
Rank: #7323 (-507)
15K → 20K
23:18 | 7:30/mi
Half· 13.11 mi
1:34:04
Rank: #7378 (-55)
20K → Half
5:00 | 7:20/mi
25K· 15.53 mi
1:53:37
Rank: #8174 (-796)
Half → 25K
19:33 | 8:04/mi
30K· 18.64 mi
2:20:34
Rank: #9496 (-1322)
25K → 30K
26:57 | 8:40/mi
20M
2:33:13
Rank: #10245 (-749)
30K → 20M
12:39 | 9:19/mi
21M
2:42:43
Rank: #10604 (-359)
20M → 21M
9:30 | 9:30/mi
35K· 21.75 mi
2:48:54
Rank: #10707 (-103)
21M → 35K
6:11 | 8:16/mi
23M
3:00:06
Rank: #11040 (-333)
35K → 23M
11:12 | 8:57/mi
24M
3:09:41
Rank: #11610 (-570)
23M → 24M
9:35 | 9:35/mi
40K· 24.85 mi
3:17:05
Rank: #11727 (-117)
24M → 40K
7:24 | 8:39/mi
25.2M
3:20:15
Rank: #11748 (-21)
40K → 25.2M
3:10 | 9:11/mi
Finish· 26.22 mi
3:28:28
Rank: #11778 (-30)
25.2M → Finish
8:13 | 8:04/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
Time1:34:04
Pace7:11 /mi
2nd Half
Distance13.11 mi
Time1:54:24
Pace8:44 /mi
📊Positive Split: 21.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:46:3621:286:5521:28
6:55
-
10K
6.21 mi11:09:0443:567:0422:28
7:14
+0:19
15K
9.32 mi11:30:541:05:467:0321:50
7:02
-0:12
20K
12.43 mi11:54:121:29:047:1023:18
7:30
+0:28
Half
13.11 mi11:59:121:34:047:115:00
7:20
-0:10
25K
15.53 mi12:18:451:53:377:1919:33
8:04
+0:44
30K
18.64 mi12:45:422:20:347:3226:57
8:40
+0:36
20M
20.00 mi12:58:212:33:137:4012:39
9:19
+0:39
21M
21.00 mi13:07:512:42:437:459:30
9:30
+0:11
35K
21.75 mi13:14:022:48:547:466:11
8:16
-1:14
23M
23.00 mi13:25:143:00:067:5011:12
8:57
+0:41
24M
24.00 mi13:34:493:09:417:549:35
9:35
+0:38
40K
24.85 mi13:42:133:17:057:567:24
8:39
-0:56
25.2M
25.20 mi13:45:233:20:157:573:10
9:11
+0:32
Finish
26.22 mi13:53:363:28:287:578:13
8:04
-1:07

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

6:55 /mi

Average Pace

7:57 /mi

Slowest Pace

9:35 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:34:04

45% of race

Time at Steady Pace

1:08:18

33% of race

Time at Slower Pace

46:06

22% of race

Average Pace: 7:57 /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 mi10:46:3621:286:5521:28
6:55
#5645
10K
6.21 mi11:09:0443:567:0422:28
7:14
#6919
15K
9.32 mi11:30:541:05:467:0321:50
7:02
#6816
20K
12.43 mi11:54:121:29:047:1023:18
7:30
#7323
Half
13.11 mi11:59:121:34:047:115:00
7:20
#7378
25K
15.53 mi12:18:451:53:377:1919:33
8:04
#8174
30K
18.64 mi12:45:422:20:347:3226:57
8:40
#9496
20M
20.00 mi12:58:212:33:137:4012:39
9:19
#10245
21M
21.00 mi13:07:512:42:437:459:30
9:30
#10604
35K
21.75 mi13:14:022:48:547:466:11
8:16
#10707
23M
23.00 mi13:25:143:00:067:5011:12
8:57
#11040
24M
24.00 mi13:34:493:09:417:549:35
9:35
#11610
40K
24.85 mi13:42:133:17:057:567:24
8:39
#11727
25.2M
25.20 mi13:45:233:20:157:573:10
9:11
#11748
Finish
26.22 mi13:53:363:28:287:578:13
8:04
#11778
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi5645519751976748(Top 25%)6050(Top 40%)6050(Top 114%)
10K6.21 mi3.10 mi6919-12746204-10076204-10078336(Top 31%)7168(Top 47%)7168(Top 136%)
15K9.32 mi3.11 mi6816+1036117+876117+876748(Top 25%)6050(Top 40%)6050(Top 114%)
20K12.43 mi3.11 mi7323-5076483-3666483-3669301(Top 35%)7692(Top 51%)7692(Top 146%)
Half13.11 mi0.68 mi7378-556521-386521-388834(Top 33%)7425(Top 49%)7425(Top 140%)
25K15.53 mi2.42 mi8174-7967021-5007021-50013230(Top 50%)9447(Top 62%)9447(Top 179%)
30K18.64 mi3.11 mi9496-13227797-7767797-77615342(Top 58%)10183(Top 67%)10183(Top 193%)
20M20.00 mi1.36 mi10245-7498187-3908187-39018039(Top 68%)11251(Top 74%)11251(Top 213%)
21M21.00 mi1.00 mi10604-3598337-1508337-15015935(Top 60%)10319(Top 68%)10319(Top 195%)
35K21.75 mi0.75 mi10707-1038364-278364-2713847(Top 52%)9336(Top 62%)9336(Top 177%)
23M23.00 mi1.25 mi11040-3338507-1438507-14315744(Top 59%)10118(Top 67%)10118(Top 191%)
24M24.00 mi1.00 mi11610-5708745-2388745-23819474(Top 73%)11741(Top 77%)11741(Top 222%)
40K24.85 mi0.85 mi11727-1178777-328777-3214235(Top 53%)9334(Top 62%)9334(Top 177%)
25.2M25.20 mi0.35 mi11748-218772+58772+513476(Top 51%)8969(Top 59%)8969(Top 170%)
Finish26.22 mi1.02 mi11778-308765+78765+712533(Top 47%)8540(Top 56%)8540(Top 162%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 25%
×21stories
+97ft-345ft

Overall

6748

Males

6050

M18-39

6050

5K→10K

3.1 - 6.2 mi

Top 31%
×5stories
+79ft-138ft

Overall

8336

Males

7168

M18-39

7168

10K→15K

6.2 - 9.3 mi

Top 25%
×3stories
+67ft-78ft

Overall

6748

Males

6050

M18-39

6050

15K→20K

9.3 - 12.4 mi

Top 35%
×5stories
+106ft-86ft

Overall

9301

Males

7692

M18-39

7692

20K→Half

12.4 - 13.1 mi

Top 33%
×2stories
+19ft-37ft

Overall

8834

Males

7425

M18-39

7425

Half→25K

13.1 - 15.5 mi

Top 50%
×4stories
+66ft-88ft

Overall

13230

Males

9447

M18-39

9447

25K→30K

15.5 - 18.6 mi

Top 58%
×9stories
+181ft-148ft

Overall

15342

Males

10183

M18-39

10183

30K→20M

18.6 - 20.0 mi

Top 68%
×5stories
+64ft-50ft

Overall

18039

Males

11251

M18-39

11251

20M→21M

20.0 - 21.0 mi

Top 60%
×8stories
+106ft-24ft

Overall

15935

Males

10319

M18-39

10319

21M→35K

21.0 - 21.8 mi

Top 52%
×7stories
+17ft-86ft

Overall

13847

Males

9336

M18-39

9336

35K→23M

21.8 - 23.0 mi

Top 59%
×5stories
+23ft-63ft

Overall

15744

Males

10118

M18-39

10118

23M→24M

23.0 - 24.0 mi

Top 73%
×6stories
+12ft-82ft

Overall

19474

Males

11741

M18-39

11741

24M→40K

24.0 - 24.9 mi

Top 53%
×1story
+6ft-20ft

Overall

14235

Males

9334

M18-39

9334

40K→25.2M

24.9 - 25.2 mi

Top 51%
×1story
+13ft-16ft

Overall

13476

Males

8969

M18-39

8969

25.2M→Finish

25.2 - 26.2 mi

Top 47%
×2stories
+22ft-21ft

Overall

12533

Males

8540

M18-39

8540

Passing Analysis

Category:
Athletes Passed
451
Passed By
6583
Net Change
-6133
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5645
5K → 10K41278-1274#5645#6919
10K → 15K17976+103#6919#6816
15K → 20K23530-507#6816#7323
20K → Half762-55#7323#7378
Half → 25K8804-796#7378#8174
25K → 30K171339-1322#8174#9496
30K → 20M6754-749#9496#10245
20M → 21M21380-359#10245#10604
21M → 35K31134-103#10604#10707
35K → 23M22355-333#10707#11040
23M → 24M8578-570#11040#11610
24M → 40K33150-117#11610#11727
40K → 25.2M2445-21#11727#11748
25.2M → Finish6898-30#11748#11778
TOTALS4516583-6133
📊

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