Boston Marathon logo
BOSTON MARATHON 2023

Kohei Yamagishi

Bib: 2290•M

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 10%
Gender (Male)
#0 / 15176
Top 17%
Masters (Masters Men)
#0 / 9891
Top 6%
Division (M40-44)
#0 / 2241
Top 17%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:08
Rank: #1041
Start → 5K
19:08 | 6:10/mi
10K· 6.21 mi
38:20
Rank: #1135 (-94)
5K → 10K
19:12 | 6:11/mi
15K· 9.32 mi
58:10
Rank: #1330 (-195)
10K → 15K
19:50 | 6:23/mi
20K· 12.43 mi
1:18:53
Rank: #1717 (-387)
15K → 20K
20:43 | 6:40/mi
Half· 13.11 mi
1:23:23
Rank: #1778 (-61)
20K → Half
4:30 | 6:36/mi
25K· 15.53 mi
1:39:55
Rank: #2056 (-278)
Half → 25K
16:32 | 6:49/mi
30K· 18.64 mi
2:01:52
Rank: #2411 (-355)
25K → 30K
21:57 | 7:04/mi
20M
2:11:31
Rank: #2514 (-103)
30K → 20M
9:39 | 7:06/mi
21M
2:19:08
Rank: #2602 (-88)
20M → 21M
7:37 | 7:37/mi
35K· 21.75 mi
2:24:11
Rank: #2618 (-16)
21M → 35K
5:03 | 6:45/mi
23M
2:32:58
Rank: #2655 (-37)
35K → 23M
8:47 | 7:01/mi
24M
2:39:54
Rank: #2719 (-64)
23M → 24M
6:56 | 6:56/mi
40K· 24.85 mi
2:45:50
Rank: #2729 (-10)
24M → 40K
5:56 | 6:56/mi
25.2M
2:48:27
Rank: #2747 (-18)
40K → 25.2M
2:37 | 7:35/mi
Finish· 26.22 mi
2:55:23
Rank: #2788 (-41)
25.2M → Finish
6:56 | 6:48/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
Time1:23:23
Pace6:22 /mi
2nd Half
Distance13.11 mi
Time1:32:00
Pace7:01 /mi
📊Positive Split: 10.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:19:4819:086:1019:08
6:10
-
10K
6.21 mi10:39:0038:206:1019:12
6:11
+0:01
15K
9.32 mi10:58:5058:106:1419:50
6:23
+0:12
20K
12.43 mi11:19:331:18:536:2120:43
6:40
+0:17
Half
13.11 mi11:24:031:23:236:224:30
6:36
-0:04
25K
15.53 mi11:40:351:39:556:2616:32
6:49
+0:13
30K
18.64 mi12:02:322:01:526:3221:57
7:04
+0:15
20M
20.00 mi12:12:112:11:316:359:39
7:06
+0:02
21M
21.00 mi12:19:482:19:086:387:37
7:37
+0:31
35K
21.75 mi12:24:512:24:116:385:03
6:45
-0:52
23M
23.00 mi12:33:382:32:586:398:47
7:01
+0:16
24M
24.00 mi12:40:342:39:546:406:56
6:56
-0:05
40K
24.85 mi12:46:302:45:506:405:56
6:56
0:00
25.2M
25.20 mi12:49:072:48:276:412:37
7:35
+0:39
Finish
26.22 mi12:56:032:55:236:426:56
6:48
-0:47

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

6:10 /mi

Average Pace

6:42 /mi

Slowest Pace

7:37 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:02:40

36% of race

Time at Steady Pace

1:10:53

40% of race

Time at Slower Pace

41:50

24% of race

Average Pace: 6:41 /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 mi10:19:4819:086:1019:08
6:10
#1041
10K
6.21 mi10:39:0038:206:1019:12
6:11
#1135
15K
9.32 mi10:58:5058:106:1419:50
6:23
#1330
20K
12.43 mi11:19:331:18:536:2120:43
6:40
#1717
Half
13.11 mi11:24:031:23:236:224:30
6:36
#1778
25K
15.53 mi11:40:351:39:556:2616:32
6:49
#2056
30K
18.64 mi12:02:322:01:526:3221:57
7:04
#2411
20M
20.00 mi12:12:112:11:316:359:39
7:06
#2514
21M
21.00 mi12:19:482:19:086:387:37
7:37
#2602
35K
21.75 mi12:24:512:24:116:385:03
6:45
#2618
23M
23.00 mi12:33:382:32:586:398:47
7:01
#2655
24M
24.00 mi12:40:342:39:546:406:56
6:56
#2719
40K
24.85 mi12:46:302:45:506:405:56
6:56
#2729
25.2M
25.20 mi12:49:072:48:276:412:37
7:35
#2747
Finish
26.22 mi12:56:032:55:236:426:56
6:48
#2788
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi10419839832014(Top 8%)1929(Top 13%)1929(Top 86%)
10K6.21 mi3.10 mi1135-941072-891072-891273(Top 5%)1210(Top 8%)1210(Top 54%)
15K9.32 mi3.11 mi1330-1951266-1941266-1942014(Top 8%)1929(Top 13%)1929(Top 86%)
20K12.43 mi3.11 mi1717-3871643-3771643-3773314(Top 12%)3144(Top 21%)3144(Top 140%)
Half13.11 mi0.68 mi1778-611701-581701-583350(Top 13%)3181(Top 21%)3181(Top 142%)
25K15.53 mi2.42 mi2056-2781971-2701971-2704284(Top 16%)4000(Top 26%)4000(Top 178%)
30K18.64 mi3.11 mi2411-3552311-3402311-3404732(Top 18%)4366(Top 29%)4366(Top 195%)
20M20.00 mi1.36 mi2514-1032405-942405-944594(Top 17%)4213(Top 28%)4213(Top 188%)
21M21.00 mi1.00 mi2602-882490-852490-855144(Top 19%)4569(Top 30%)4569(Top 204%)
35K21.75 mi0.75 mi2618-162503-132503-133821(Top 14%)3515(Top 23%)3515(Top 157%)
23M23.00 mi1.25 mi2655-372538-352538-353843(Top 14%)3540(Top 23%)3540(Top 158%)
24M24.00 mi1.00 mi2719-642592-542592-544309(Top 16%)3901(Top 26%)3901(Top 174%)
40K24.85 mi0.85 mi2729-102599-72599-73506(Top 13%)3185(Top 21%)3185(Top 142%)
25.2M25.20 mi0.35 mi2747-182611-122611-124244(Top 16%)3714(Top 24%)3714(Top 166%)
Finish26.22 mi1.02 mi2788-412649-382649-384063(Top 15%)3584(Top 24%)3584(Top 160%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 8%
×21stories
+97ft-345ft

Overall

2014

Males

1929

M40-44

1929

5K→10K

3.1 - 6.2 mi

Top 5%
×5stories
+79ft-138ft

Overall

1273

Males

1210

M40-44

1210

10K→15K

6.2 - 9.3 mi

Top 8%
×3stories
+67ft-78ft

Overall

2014

Males

1929

M40-44

1929

15K→20K

9.3 - 12.4 mi

Top 12%
×5stories
+106ft-86ft

Overall

3314

Males

3144

M40-44

3144

20K→Half

12.4 - 13.1 mi

Top 13%
×2stories
+19ft-37ft

Overall

3350

Males

3181

M40-44

3181

Half→25K

13.1 - 15.5 mi

Top 16%
×4stories
+66ft-88ft

Overall

4284

Males

4000

M40-44

4000

25K→30K

15.5 - 18.6 mi

Top 18%
×9stories
+181ft-148ft

Overall

4732

Males

4366

M40-44

4366

30K→20M

18.6 - 20.0 mi

Top 17%
×5stories
+64ft-50ft

Overall

4594

Males

4213

M40-44

4213

20M→21M

20.0 - 21.0 mi

Top 19%
×8stories
+106ft-24ft

Overall

5144

Males

4569

M40-44

4569

21M→35K

21.0 - 21.8 mi

Top 14%
×7stories
+17ft-86ft

Overall

3821

Males

3515

M40-44

3515

35K→23M

21.8 - 23.0 mi

Top 14%
×5stories
+23ft-63ft

Overall

3843

Males

3540

M40-44

3540

23M→24M

23.0 - 24.0 mi

Top 16%
×6stories
+12ft-82ft

Overall

4309

Males

3901

M40-44

3901

24M→40K

24.0 - 24.9 mi

Top 13%
×1story
+6ft-20ft

Overall

3506

Males

3185

M40-44

3185

40K→25.2M

24.9 - 25.2 mi

Top 16%
×1story
+13ft-16ft

Overall

4244

Males

3714

M40-44

3714

25.2M→Finish

25.2 - 26.2 mi

Top 15%
×2stories
+22ft-21ft

Overall

4063

Males

3584

M40-44

3584

Passing Analysis

Category:
Athletes Passed
216
Passed By
1963
Net Change
-1747
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1041
5K → 10K17111-94#1041#1135
10K → 15K5200-195#1135#1330
15K → 20K4391-387#1330#1717
20K → Half263-61#1717#1778
Half → 25K9287-278#1778#2056
25K → 30K6361-355#2056#2411
30K → 20M16119-103#2411#2514
20M → 21M14102-88#2514#2602
21M → 35K1329-16#2602#2618
35K → 23M3875-37#2618#2655
23M → 24M2892-64#2655#2719
24M → 40K3545-10#2719#2729
40K → 25.2M725-18#2729#2747
25.2M → Finish2263-41#2747#2788
TOTALS2161963-1747
📊

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