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BOSTON MARATHON 2025

Koji Uchino

Bib: 1226•M

CA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 4%
Gender (Male)
#0 / 16105
Top 7%
Division (M18-39)
#0 / 5642
Top 18%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:09
Rank: #1663
Start → 5K
19:09 | 6:10/mi
10K· 6.21 mi
38:00
Rank: #1491 (+172)
5K → 10K
18:51 | 6:04/mi
15K· 9.32 mi
56:52
Rank: #1402 (+89)
10K → 15K
18:52 | 6:04/mi
20K· 12.43 mi
1:15:47
Rank: #1314 (+88)
15K → 20K
18:55 | 6:05/mi
Half· 13.11 mi
1:19:53
Rank: #1309 (+5)
20K → Half
4:06 | 6:01/mi
25K· 15.53 mi
1:34:44
Rank: #1271 (+38)
Half → 25K
14:51 | 6:07/mi
30K· 18.64 mi
1:54:24
Rank: #1260 (+11)
25K → 30K
19:40 | 6:20/mi
20M
2:03:14
Rank: #1266 (-6)
30K → 20M
8:50 | 6:30/mi
21M
2:09:58
Rank: #1240 (+26)
20M → 21M
6:44 | 6:44/mi
35K· 21.75 mi
2:14:41
Rank: #1228 (+12)
21M → 35K
4:43 | 6:18/mi
23M
2:23:01
Rank: #1239 (-11)
35K → 23M
8:20 | 6:39/mi
24M
2:29:29
Rank: #1240 (-1)
23M → 24M
6:28 | 6:28/mi
40K· 24.85 mi
2:35:09
Rank: #1257 (-17)
24M → 40K
5:40 | 6:38/mi
25.2M
2:37:41
Rank: #1266 (-9)
40K → 25.2M
2:32 | 7:21/mi
Finish· 26.22 mi
2:43:58
Rank: #1255 (+11)
25.2M → Finish
6:17 | 6:10/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:19:53
Pace6:06 /mi
2nd Half
Distance13.11 mi
Time1:24:05
Pace6:25 /mi
📊Positive Split: 5.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:19:4419:096:1019:09
6:10
-
10K
6.21 mi10:38:3538:006:0718:51
6:04
-0:06
15K
9.32 mi10:57:2756:526:0618:52
6:04
0:00
20K
12.43 mi11:16:221:15:476:0618:55
6:05
+0:01
Half
13.11 mi11:20:281:19:536:064:06
6:01
-0:04
25K
15.53 mi11:35:191:34:446:0614:51
6:07
+0:06
30K
18.64 mi11:54:591:54:246:0819:40
6:20
+0:13
20M
20.00 mi12:03:492:03:146:108:50
6:30
+0:10
21M
21.00 mi12:10:332:09:586:116:44
6:44
+0:14
35K
21.75 mi12:15:162:14:416:124:43
6:18
-0:26
23M
23.00 mi12:23:362:23:016:138:20
6:39
+0:21
24M
24.00 mi12:30:042:29:296:146:28
6:28
-0:11
40K
24.85 mi12:35:442:35:096:155:40
6:38
+0:10
25.2M
25.20 mi12:38:162:37:416:152:32
7:21
+0:43
Finish
26.22 mi12:44:332:43:586:156:17
6:10
-1:11

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

6:01 /mi

Average Pace

6:15 /mi

Slowest Pace

7:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:15:35

46% of race

Time at Steady Pace

56:17

34% of race

Time at Slower Pace

32:06

20% of race

Average Pace: 6:15 /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 mi10:19:4419:096:1019:09
6:10
#1663
10K
6.21 mi10:38:3538:006:0718:51
6:04
#1491
15K
9.32 mi10:57:2756:526:0618:52
6:04
#1402
20K
12.43 mi11:16:221:15:476:0618:55
6:05
#1314
Half
13.11 mi11:20:281:19:536:064:06
6:01
#1309
25K
15.53 mi11:35:191:34:446:0614:51
6:07
#1271
30K
18.64 mi11:54:591:54:246:0819:40
6:20
#1260
20M
20.00 mi12:03:492:03:146:108:50
6:30
#1266
21M
21.00 mi12:10:332:09:586:116:44
6:44
#1240
35K
21.75 mi12:15:162:14:416:124:43
6:18
#1228
23M
23.00 mi12:23:362:23:016:138:20
6:39
#1239
24M
24.00 mi12:30:042:29:296:146:28
6:28
#1240
40K
24.85 mi12:35:442:35:096:155:40
6:38
#1257
25.2M
25.20 mi12:38:162:37:416:152:32
7:21
#1266
Finish
26.22 mi12:44:332:43:586:156:17
6:10
#1255
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi1663158115811269(Top 4%)1204(Top 7%)1204(Top 21%)
10K6.21 mi3.10 mi1491+1721418+1631418+1631350(Top 5%)1280(Top 8%)1280(Top 23%)
15K9.32 mi3.11 mi1402+891331+871331+871269(Top 4%)1204(Top 7%)1204(Top 21%)
20K12.43 mi3.11 mi1314+881245+861245+861140(Top 4%)1076(Top 7%)1076(Top 19%)
Half13.11 mi0.68 mi1309+51240+51240+51183(Top 4%)1120(Top 7%)1120(Top 20%)
25K15.53 mi2.42 mi1271+381201+391201+391183(Top 4%)1117(Top 7%)1117(Top 20%)
30K18.64 mi3.11 mi1260+111189+121189+121299(Top 5%)1226(Top 8%)1226(Top 22%)
20M20.00 mi1.36 mi1266-61195-61195-61610(Top 6%)1521(Top 9%)1521(Top 27%)
21M21.00 mi1.00 mi1240+261169+261169+261293(Top 5%)1222(Top 8%)1222(Top 22%)
35K21.75 mi0.75 mi1228+121157+121157+121599(Top 6%)1499(Top 9%)1499(Top 27%)
23M23.00 mi1.25 mi1239-111166-91166-92042(Top 7%)1907(Top 12%)1907(Top 34%)
24M24.00 mi1.00 mi1240-11167-11167-11902(Top 7%)1764(Top 11%)1764(Top 31%)
40K24.85 mi0.85 mi1257-171182-151182-152041(Top 7%)1879(Top 12%)1879(Top 33%)
25.2M25.20 mi0.35 mi1266-91190-81190-82652(Top 9%)2354(Top 15%)2354(Top 42%)
Finish26.22 mi1.02 mi1255+111180+101180+101400(Top 5%)1303(Top 8%)1303(Top 23%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 4%
×21stories
+97ft-345ft

Overall

1269

Males

1204

M18-39

1204

5K→10K

3.1 - 6.2 mi

Top 5%
×5stories
+79ft-138ft

Overall

1350

Males

1280

M18-39

1280

10K→15K

6.2 - 9.3 mi

Top 4%
×3stories
+67ft-78ft

Overall

1269

Males

1204

M18-39

1204

15K→20K

9.3 - 12.4 mi

Top 4%
×5stories
+106ft-86ft

Overall

1140

Males

1076

M18-39

1076

20K→Half

12.4 - 13.1 mi

Top 4%
×2stories
+19ft-37ft

Overall

1183

Males

1120

M18-39

1120

Half→25K

13.1 - 15.5 mi

Top 4%
×4stories
+66ft-88ft

Overall

1183

Males

1117

M18-39

1117

25K→30K

15.5 - 18.6 mi

Top 5%
×9stories
+181ft-148ft

Overall

1299

Males

1226

M18-39

1226

30K→20M

18.6 - 20.0 mi

Top 6%
×5stories
+64ft-50ft

Overall

1610

Males

1521

M18-39

1521

20M→21M

20.0 - 21.0 mi

Top 5%
×8stories
+106ft-24ft

Overall

1293

Males

1222

M18-39

1222

21M→35K

21.0 - 21.8 mi

Top 6%
×7stories
+17ft-86ft

Overall

1599

Males

1499

M18-39

1499

35K→23M

21.8 - 23.0 mi

Top 7%
×5stories
+23ft-63ft

Overall

2042

Males

1907

M18-39

1907

23M→24M

23.0 - 24.0 mi

Top 7%
×6stories
+12ft-82ft

Overall

1902

Males

1764

M18-39

1764

24M→40K

24.0 - 24.9 mi

Top 7%
×1story
+6ft-20ft

Overall

2041

Males

1879

M18-39

1879

40K→25.2M

24.9 - 25.2 mi

Top 9%
×1story
+13ft-16ft

Overall

2652

Males

2354

M18-39

2354

25.2M→Finish

25.2 - 26.2 mi

Top 5%
×2stories
+22ft-21ft

Overall

1400

Males

1303

M18-39

1303

Passing Analysis

Category:
Athletes Passed
721
Passed By
313
Net Change
+408
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1663
5K → 10K19422+172#1663#1491
10K → 15K10920+89#1491#1402
15K → 20K10012+88#1402#1314
20K → Half138+5#1314#1309
Half → 25K5719+38#1309#1271
25K → 30K5746+11#1271#1260
30K → 20M2733-6#1260#1266
20M → 21M3711+26#1266#1240
21M → 35K219+12#1240#1228
35K → 23M3748-11#1228#1239
23M → 24M2021-1#1239#1240
24M → 40K1532-17#1240#1257
40K → 25.2M817-9#1257#1266
25.2M → Finish2615+11#1266#1255
TOTALS721313+408
📊

Passing Visuals

Category:
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🔥Passing Intensity

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing