Boston Marathon logo
BOSTON MARATHON 2023

Duane Tamashiro

Bib: 11898•M

HI

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 24%
Gender (Male)
#0 / 15176
Top 37%
Masters (Masters Men)
#0 / 9891
Top 24%
Division (M50-54)
#0 / 2052
Top 18%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:33
Rank: #7834
Start → 5K
22:33 | 7:15/mi
10K· 6.21 mi
43:52
Rank: #6853 (+981)
5K → 10K
21:19 | 6:52/mi
15K· 9.32 mi
1:04:56
Rank: #6297 (+556)
10K → 15K
21:04 | 6:47/mi
20K· 12.43 mi
1:26:14
Rank: #5977 (+320)
15K → 20K
21:18 | 6:51/mi
Half· 13.11 mi
1:30:43
Rank: #5847 (+130)
20K → Half
4:29 | 6:34/mi
25K· 15.53 mi
1:47:29
Rank: #5706 (+141)
Half → 25K
16:46 | 6:55/mi
30K· 18.64 mi
2:09:44
Rank: #5581 (+125)
25K → 30K
22:15 | 7:10/mi
20M
2:19:47
Rank: #5589 (-8)
30K → 20M
10:03 | 7:24/mi
21M
2:28:01
Rank: #5700 (-111)
20M → 21M
8:14 | 8:14/mi
35K· 21.75 mi
2:33:30
Rank: #5732 (-32)
21M → 35K
5:29 | 7:20/mi
23M
2:43:36
Rank: #5882 (-150)
35K → 23M
10:06 | 8:04/mi
24M
2:51:23
Rank: #5976 (-94)
23M → 24M
7:47 | 7:47/mi
40K· 24.85 mi
2:58:26
Rank: #6103 (-127)
24M → 40K
7:03 | 8:15/mi
25.2M
3:01:37
Rank: #6199 (-96)
40K → 25.2M
3:11 | 9:14/mi
Finish· 26.22 mi
3:09:54
Rank: #6408 (-209)
25.2M → Finish
8:17 | 8:08/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
Time1:30:43
Pace6:55 /mi
2nd Half
Distance13.11 mi
Time1:39:11
Pace7:34 /mi
📊Positive Split: 9.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:3622:337:1522:33
7:15
-
10K
6.21 mi11:10:5543:527:0421:19
6:52
-0:23
15K
9.32 mi11:31:591:04:566:5821:04
6:47
-0:05
20K
12.43 mi11:53:171:26:146:5621:18
6:51
+0:04
Half
13.11 mi11:57:461:30:436:554:29
6:34
-0:17
25K
15.53 mi12:14:321:47:296:5516:46
6:55
+0:21
30K
18.64 mi12:36:472:09:446:5822:15
7:10
+0:15
20M
20.00 mi12:46:502:19:476:5910:03
7:24
+0:14
21M
21.00 mi12:55:042:28:017:038:14
8:14
+0:50
35K
21.75 mi13:00:332:33:307:035:29
7:20
-0:54
23M
23.00 mi13:10:392:43:367:0710:06
8:04
+0:44
24M
24.00 mi13:18:262:51:237:087:47
7:47
-0:17
40K
24.85 mi13:25:292:58:267:117:03
8:15
+0:28
25.2M
25.20 mi13:28:403:01:377:123:11
9:14
+0:59
Finish
26.22 mi13:36:573:09:547:158:17
8:08
-1:06

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

6:34 /mi

Average Pace

7:15 /mi

Slowest Pace

9:14 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:24:56

45% of race

Time at Steady Pace

1:00:20

32% of race

Time at Slower Pace

44:38

24% of race

Average Pace: 7:15 /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 mi10:49:3622:337:1522:33
7:15
#7834
10K
6.21 mi11:10:5543:527:0421:19
6:52
#6853
15K
9.32 mi11:31:591:04:566:5821:04
6:47
#6297
20K
12.43 mi11:53:171:26:146:5621:18
6:51
#5977
Half
13.11 mi11:57:461:30:436:554:29
6:34
#5847
25K
15.53 mi12:14:321:47:296:5516:46
6:55
#5706
30K
18.64 mi12:36:472:09:446:5822:15
7:10
#5581
20M
20.00 mi12:46:502:19:476:5910:03
7:24
#5589
21M
21.00 mi12:55:042:28:017:038:14
8:14
#5700
35K
21.75 mi13:00:332:33:307:035:29
7:20
#5732
23M
23.00 mi13:10:392:43:367:0710:06
8:04
#5882
24M
24.00 mi13:18:262:51:237:087:47
7:47
#5976
40K
24.85 mi13:25:292:58:267:117:03
8:15
#6103
25.2M
25.20 mi13:28:403:01:377:123:11
9:14
#6199
Finish
26.22 mi13:36:573:09:547:158:17
8:08
#6408
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi7834686068604948(Top 19%)4599(Top 30%)4599(Top 224%)
10K6.21 mi3.10 mi6853+9816155+7056155+7055848(Top 22%)5341(Top 35%)5341(Top 260%)
15K9.32 mi3.11 mi6297+5565706+4495706+4494948(Top 19%)4599(Top 30%)4599(Top 224%)
20K12.43 mi3.11 mi5977+3205456+2505456+2504975(Top 19%)4617(Top 30%)4617(Top 225%)
Half13.11 mi0.68 mi5847+1305359+975359+973291(Top 12%)3141(Top 21%)3141(Top 153%)
25K15.53 mi2.42 mi5706+1415247+1125247+1125065(Top 19%)4682(Top 31%)4682(Top 228%)
30K18.64 mi3.11 mi5581+1255130+1175130+1175282(Top 20%)4825(Top 32%)4825(Top 235%)
20M20.00 mi1.36 mi5589-85132-25132-26163(Top 23%)5415(Top 36%)5415(Top 264%)
21M21.00 mi1.00 mi5700-1115218-865218-868764(Top 33%)6919(Top 46%)6919(Top 337%)
35K21.75 mi0.75 mi5732-325237-195237-197287(Top 27%)6060(Top 40%)6060(Top 295%)
23M23.00 mi1.25 mi5882-1505334-975334-9710190(Top 38%)7571(Top 50%)7571(Top 369%)
24M24.00 mi1.00 mi5976-945391-575391-579613(Top 36%)7192(Top 47%)7192(Top 350%)
40K24.85 mi0.85 mi6103-1275480-895480-8911613(Top 44%)8115(Top 53%)8115(Top 395%)
25.2M25.20 mi0.35 mi6199-965546-665546-6613688(Top 51%)9056(Top 60%)9056(Top 441%)
Finish26.22 mi1.02 mi6408-2095688-1425688-14212927(Top 49%)8724(Top 57%)8724(Top 425%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 19%
×21stories
+97ft-345ft

Overall

4948

Males

4599

M50-54

4599

5K→10K

3.1 - 6.2 mi

Top 22%
×5stories
+79ft-138ft

Overall

5848

Males

5341

M50-54

5341

10K→15K

6.2 - 9.3 mi

Top 19%
×3stories
+67ft-78ft

Overall

4948

Males

4599

M50-54

4599

15K→20K

9.3 - 12.4 mi

Top 19%
×5stories
+106ft-86ft

Overall

4975

Males

4617

M50-54

4617

20K→Half

12.4 - 13.1 mi

Top 12%
×2stories
+19ft-37ft

Overall

3291

Males

3141

M50-54

3141

Half→25K

13.1 - 15.5 mi

Top 19%
×4stories
+66ft-88ft

Overall

5065

Males

4682

M50-54

4682

25K→30K

15.5 - 18.6 mi

Top 20%
×9stories
+181ft-148ft

Overall

5282

Males

4825

M50-54

4825

30K→20M

18.6 - 20.0 mi

Top 23%
×5stories
+64ft-50ft

Overall

6163

Males

5415

M50-54

5415

20M→21M

20.0 - 21.0 mi

Top 33%
×8stories
+106ft-24ft

Overall

8764

Males

6919

M50-54

6919

21M→35K

21.0 - 21.8 mi

Top 27%
×7stories
+17ft-86ft

Overall

7287

Males

6060

M50-54

6060

35K→23M

21.8 - 23.0 mi

Top 38%
×5stories
+23ft-63ft

Overall

10190

Males

7571

M50-54

7571

23M→24M

23.0 - 24.0 mi

Top 36%
×6stories
+12ft-82ft

Overall

9613

Males

7192

M50-54

7192

24M→40K

24.0 - 24.9 mi

Top 44%
×1story
+6ft-20ft

Overall

11613

Males

8115

M50-54

8115

40K→25.2M

24.9 - 25.2 mi

Top 51%
×1story
+13ft-16ft

Overall

13688

Males

9056

M50-54

9056

25.2M→Finish

25.2 - 26.2 mi

Top 49%
×2stories
+22ft-21ft

Overall

12927

Males

8724

M50-54

8724

Passing Analysis

Category:
Athletes Passed
2543
Passed By
1117
Net Change
+1426
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7834
5K → 10K9909+981#7834#6853
10K → 15K5604+556#6853#6297
15K → 20K3266+320#6297#5977
20K → Half1300+130#5977#5847
Half → 25K15716+141#5847#5706
25K → 30K18358+125#5706#5581
30K → 20M4957-8#5581#5589
20M → 21M23134-111#5589#5700
21M → 35K2456-32#5700#5732
35K → 23M25175-150#5732#5882
23M → 24M36130-94#5882#5976
24M → 40K23150-127#5976#6103
40K → 25.2M4100-96#6103#6199
25.2M → Finish13222-209#6199#6408
TOTALS25431117+1426
📊

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