Boston Marathon logo
BOSTON MARATHON 2023

Yuichiro Katagiri

Bib: 2657•M

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 5%
Gender (Male)
#0 / 15176
Top 9%
Division (M18-39)
#0 / 5285
Top 21%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:00
Rank: #1962
Start → 5K
20:00 | 6:26/mi
10K· 6.21 mi
39:11
Rank: #1588 (+374)
5K → 10K
19:11 | 6:10/mi
15K· 9.32 mi
58:32
Rank: #1494 (+94)
10K → 15K
19:21 | 6:14/mi
20K· 12.43 mi
1:18:10
Rank: #1468 (+26)
15K → 20K
19:38 | 6:19/mi
Half· 13.11 mi
1:22:26
Rank: #1469 (-1)
20K → Half
4:16 | 6:15/mi
25K· 15.53 mi
1:37:48
Rank: #1458 (+11)
Half → 25K
15:22 | 6:20/mi
30K· 18.64 mi
1:58:35
Rank: #1601 (-143)
25K → 30K
20:47 | 6:41/mi
20M
2:07:21
Rank: #1553 (+48)
30K → 20M
8:46 | 6:27/mi
21M
2:14:08
Rank: #1521 (+32)
20M → 21M
6:47 | 6:47/mi
35K· 21.75 mi
2:18:51
Rank: #1513 (+8)
21M → 35K
4:43 | 6:18/mi
23M
2:26:56
Rank: #1478 (+35)
35K → 23M
8:05 | 6:27/mi
24M
2:33:16
Rank: #1449 (+29)
23M → 24M
6:20 | 6:20/mi
40K· 24.85 mi
2:38:42
Rank: #1422 (+27)
24M → 40K
5:26 | 6:21/mi
25.2M
2:41:04
Rank: #1414 (+8)
40K → 25.2M
2:22 | 6:52/mi
Finish· 26.22 mi
2:47:19
Rank: #1375 (+39)
25.2M → Finish
6:15 | 6:08/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
Time1:22:26
Pace6:17 /mi
2nd Half
Distance13.11 mi
Time1:24:53
Pace6:29 /mi
📊Positive Split: 3.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:20:5520:006:2620:00
6:26
-
10K
6.21 mi10:40:0639:116:1819:11
6:10
-0:16
15K
9.32 mi10:59:2758:326:1719:21
6:14
+0:04
20K
12.43 mi11:19:051:18:106:1719:38
6:19
+0:05
Half
13.11 mi11:23:211:22:266:174:16
6:15
-0:04
25K
15.53 mi11:38:431:37:486:1815:22
6:20
+0:05
30K
18.64 mi11:59:301:58:356:2220:47
6:41
+0:21
20M
20.00 mi12:08:162:07:216:228:46
6:27
-0:14
21M
21.00 mi12:15:032:14:086:236:47
6:47
+0:20
35K
21.75 mi12:19:462:18:516:234:43
6:18
-0:29
23M
23.00 mi12:27:512:26:566:238:05
6:27
+0:09
24M
24.00 mi12:34:112:33:166:236:20
6:20
-0:07
40K
24.85 mi12:39:372:38:426:235:26
6:21
+0:01
25.2M
25.20 mi12:41:592:41:046:232:22
6:52
+0:31
Finish
26.22 mi12:48:142:47:196:236:15
6:08
-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

6:08 /mi

Average Pace

6:23 /mi

Slowest Pace

6:52 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:38:10

95% of race

Time at Steady Pace

9:09

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:23 /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 mi10:20:5520:006:2620:00
6:26
#1962
10K
6.21 mi10:40:0639:116:1819:11
6:10
#1588
15K
9.32 mi10:59:2758:326:1719:21
6:14
#1494
20K
12.43 mi11:19:051:18:106:1719:38
6:19
#1468
Half
13.11 mi11:23:211:22:266:174:16
6:15
#1469
25K
15.53 mi11:38:431:37:486:1815:22
6:20
#1458
30K
18.64 mi11:59:301:58:356:2220:47
6:41
#1601
20M
20.00 mi12:08:162:07:216:228:46
6:27
#1553
21M
21.00 mi12:15:032:14:086:236:47
6:47
#1521
35K
21.75 mi12:19:462:18:516:234:43
6:18
#1513
23M
23.00 mi12:27:512:26:566:238:05
6:27
#1478
24M
24.00 mi12:34:112:33:166:236:20
6:20
#1449
40K
24.85 mi12:39:372:38:426:235:26
6:21
#1422
25.2M
25.20 mi12:41:592:41:046:232:22
6:52
#1414
Finish
26.22 mi12:48:142:47:196:236:15
6:08
#1375
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi1962187218721337(Top 5%)1274(Top 8%)1274(Top 24%)
10K6.21 mi3.10 mi1588+3741515+3571515+3571252(Top 5%)1189(Top 8%)1189(Top 22%)
15K9.32 mi3.11 mi1494+941424+911424+911337(Top 5%)1274(Top 8%)1274(Top 24%)
20K12.43 mi3.11 mi1468+261401+231401+231465(Top 6%)1399(Top 9%)1399(Top 26%)
Half13.11 mi0.68 mi1469-11402-11402-11582(Top 6%)1517(Top 10%)1517(Top 29%)
25K15.53 mi2.42 mi1458+111392+101392+101465(Top 6%)1402(Top 9%)1402(Top 27%)
30K18.64 mi3.11 mi1601-1431532-1401532-1402331(Top 9%)2220(Top 15%)2220(Top 42%)
20M20.00 mi1.36 mi1553+481483+491483+491282(Top 5%)1221(Top 8%)1221(Top 23%)
21M21.00 mi1.00 mi1521+321453+301453+301353(Top 5%)1290(Top 9%)1290(Top 24%)
35K21.75 mi0.75 mi1513+81446+71446+71574(Top 6%)1494(Top 10%)1494(Top 28%)
23M23.00 mi1.25 mi1478+351412+341412+341285(Top 5%)1216(Top 8%)1216(Top 23%)
24M24.00 mi1.00 mi1449+291382+301382+301432(Top 5%)1355(Top 9%)1355(Top 26%)
40K24.85 mi0.85 mi1422+271356+261356+261059(Top 4%)1002(Top 7%)1002(Top 19%)
25.2M25.20 mi0.35 mi1414+81348+81348+81316(Top 5%)1246(Top 8%)1246(Top 24%)
Finish26.22 mi1.02 mi1375+391309+391309+391082(Top 4%)1031(Top 7%)1031(Top 20%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 5%
×21stories
+97ft-345ft

Overall

1337

Males

1274

M18-39

1274

5K→10K

3.1 - 6.2 mi

Top 5%
×5stories
+79ft-138ft

Overall

1252

Males

1189

M18-39

1189

10K→15K

6.2 - 9.3 mi

Top 5%
×3stories
+67ft-78ft

Overall

1337

Males

1274

M18-39

1274

15K→20K

9.3 - 12.4 mi

Top 6%
×5stories
+106ft-86ft

Overall

1465

Males

1399

M18-39

1399

20K→Half

12.4 - 13.1 mi

Top 6%
×2stories
+19ft-37ft

Overall

1582

Males

1517

M18-39

1517

Half→25K

13.1 - 15.5 mi

Top 6%
×4stories
+66ft-88ft

Overall

1465

Males

1402

M18-39

1402

25K→30K

15.5 - 18.6 mi

Top 9%
×9stories
+181ft-148ft

Overall

2331

Males

2220

M18-39

2220

30K→20M

18.6 - 20.0 mi

Top 5%
×5stories
+64ft-50ft

Overall

1282

Males

1221

M18-39

1221

20M→21M

20.0 - 21.0 mi

Top 5%
×8stories
+106ft-24ft

Overall

1353

Males

1290

M18-39

1290

21M→35K

21.0 - 21.8 mi

Top 6%
×7stories
+17ft-86ft

Overall

1574

Males

1494

M18-39

1494

35K→23M

21.8 - 23.0 mi

Top 5%
×5stories
+23ft-63ft

Overall

1285

Males

1216

M18-39

1216

23M→24M

23.0 - 24.0 mi

Top 5%
×6stories
+12ft-82ft

Overall

1432

Males

1355

M18-39

1355

24M→40K

24.0 - 24.9 mi

Top 4%
×1story
+6ft-20ft

Overall

1059

Males

1002

M18-39

1002

40K→25.2M

24.9 - 25.2 mi

Top 5%
×1story
+13ft-16ft

Overall

1316

Males

1246

M18-39

1246

25.2M→Finish

25.2 - 26.2 mi

Top 4%
×2stories
+22ft-21ft

Overall

1082

Males

1031

M18-39

1031

Passing Analysis

Category:
Athletes Passed
914
Passed By
327
Net Change
+587
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1962
5K → 10K3817+374#1962#1588
10K → 15K11117+94#1588#1494
15K → 20K6438+26#1494#1468
20K → Half67-1#1468#1469
Half → 25K4231+11#1469#1458
25K → 30K22165-143#1458#1601
30K → 20M546+48#1601#1553
20M → 21M408+32#1553#1521
21M → 35K179+8#1521#1513
35K → 23M427+35#1513#1478
23M → 24M4011+29#1478#1449
24M → 40K358+27#1449#1422
40K → 25.2M135+8#1422#1414
25.2M → Finish478+39#1414#1375
TOTALS914327+587
📊

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