Boston Marathon logo
BOSTON MARATHON 2025

Ryo Arai

Bib: 628•M

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Top 9%
Gender (Male)
#0 / 16105
Top 16%
Division (M18-39)
#0 / 5642
Top 36%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
17:08
Rank: #230
Start → 5K
17:08 | 5:31/mi
10K· 6.21 mi
34:28
Rank: #255 (-25)
5K → 10K
17:20 | 5:35/mi
15K· 9.32 mi
52:33
Rank: #321 (-66)
10K → 15K
18:05 | 5:49/mi
20K· 12.43 mi
1:12:10
Rank: #535 (-214)
15K → 20K
19:37 | 6:19/mi
Half· 13.11 mi
1:16:28
Rank: #586 (-51)
20K → Half
4:18 | 6:18/mi
25K· 15.53 mi
1:32:54
Rank: #898 (-312)
Half → 25K
16:26 | 6:47/mi
30K· 18.64 mi
1:55:47
Rank: #1538 (-640)
25K → 30K
22:53 | 7:22/mi
20M
2:09:40
Rank: #2781 (-1243)
30K → 20M
13:53 | 10:13/mi
21M
2:16:39
Rank: #2717 (+64)
20M → 21M
6:59 | 6:59/mi
35K· 21.75 mi
2:21:40
Rank: #2721 (-4)
21M → 35K
5:01 | 6:42/mi
23M
2:30:16
Rank: #2706 (+15)
35K → 23M
8:36 | 6:52/mi
24M
2:36:55
Rank: #2659 (+47)
23M → 24M
6:39 | 6:39/mi
40K· 24.85 mi
2:42:41
Rank: #2638 (+21)
24M → 40K
5:46 | 6:45/mi
25.2M
2:45:20
Rank: #2652 (-14)
40K → 25.2M
2:39 | 7:41/mi
Finish· 26.22 mi
2:52:08
Rank: #2657 (-5)
25.2M → Finish
6:48 | 6:40/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
Time1:16:28
Pace5:50 /mi
2nd Half
Distance13.11 mi
Time1:35:40
Pace7:18 /mi
📊Positive Split: 25.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:17:1117:085:3117:08
5:31
-
10K
6.21 mi10:34:3134:285:3317:20
5:35
+0:04
15K
9.32 mi10:52:3652:335:3818:05
5:49
+0:14
20K
12.43 mi11:12:131:12:105:4819:37
6:19
+0:30
Half
13.11 mi11:16:311:16:285:504:18
6:18
-0:01
25K
15.53 mi11:32:571:32:545:5916:26
6:47
+0:29
30K
18.64 mi11:55:501:55:476:1322:53
7:22
+0:35
20M
20.00 mi12:09:432:09:406:2913:53
10:13
+2:51
21M
21.00 mi12:16:422:16:396:306:59
6:59
-3:14
35K
21.75 mi12:21:432:21:406:315:01
6:42
-0:17
23M
23.00 mi12:30:192:30:166:328:36
6:52
+0:10
24M
24.00 mi12:36:582:36:556:326:39
6:39
-0:13
40K
24.85 mi12:42:442:42:416:335:46
6:45
+0:06
25.2M
25.20 mi12:45:232:45:206:342:39
7:41
+0:56
Finish
26.22 mi12:52:112:52:086:346:48
6:40
-1:01

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

5:31 /mi

Average Pace

6:34 /mi

Slowest Pace

10:13 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

52:33

31% of race

Time at Steady Pace

1:20:10

47% of race

Time at Slower Pace

39:25

23% of race

Average Pace: 6:34 /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 mi10:17:1117:085:3117:08
5:31
#230
10K
6.21 mi10:34:3134:285:3317:20
5:35
#255
15K
9.32 mi10:52:3652:335:3818:05
5:49
#321
20K
12.43 mi11:12:131:12:105:4819:37
6:19
#535
Half
13.11 mi11:16:311:16:285:504:18
6:18
#586
25K
15.53 mi11:32:571:32:545:5916:26
6:47
#898
30K
18.64 mi11:55:501:55:476:1322:53
7:22
#1538
20M
20.00 mi12:09:432:09:406:2913:53
10:13
#2781
21M
21.00 mi12:16:422:16:396:306:59
6:59
#2717
35K
21.75 mi12:21:432:21:406:315:01
6:42
#2721
23M
23.00 mi12:30:192:30:166:328:36
6:52
#2706
24M
24.00 mi12:36:582:36:556:326:39
6:39
#2659
40K
24.85 mi12:42:442:42:416:335:46
6:45
#2638
25.2M
25.20 mi12:45:232:45:206:342:39
7:41
#2652
Finish
26.22 mi12:52:112:52:086:346:48
6:40
#2657
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi230203203565(Top 2%)527(Top 3%)527(Top 9%)
10K6.21 mi3.10 mi255-25226-23226-23286(Top 1%)257(Top 2%)257(Top 5%)
15K9.32 mi3.11 mi321-66292-66292-66565(Top 2%)527(Top 3%)527(Top 9%)
20K12.43 mi3.11 mi535-214497-205497-2052083(Top 7%)1987(Top 12%)1987(Top 35%)
Half13.11 mi0.68 mi586-51542-45542-452576(Top 9%)2465(Top 15%)2465(Top 44%)
25K15.53 mi2.42 mi898-312846-304846-3044703(Top 17%)4332(Top 27%)4332(Top 77%)
30K18.64 mi3.11 mi1538-6401458-6121458-6126841(Top 24%)5870(Top 36%)5870(Top 104%)
20M20.00 mi1.36 mi2781-12432649-11912649-119121602(Top 76%)12858(Top 80%)12858(Top 228%)
21M21.00 mi1.00 mi2717+642587+622587+622214(Top 8%)2070(Top 13%)2070(Top 37%)
35K21.75 mi0.75 mi2721-42589-22589-23555(Top 13%)3228(Top 20%)3228(Top 57%)
23M23.00 mi1.25 mi2706+152571+182571+183063(Top 11%)2802(Top 17%)2802(Top 50%)
24M24.00 mi1.00 mi2659+472525+462525+462733(Top 10%)2507(Top 16%)2507(Top 44%)
40K24.85 mi0.85 mi2638+212500+252500+252601(Top 9%)2369(Top 15%)2369(Top 42%)
25.2M25.20 mi0.35 mi2652-142512-122512-124258(Top 15%)3614(Top 22%)3614(Top 64%)
Finish26.22 mi1.02 mi2657-52515-32515-33733(Top 13%)3238(Top 20%)3238(Top 57%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 2%
×21stories
+97ft-345ft

Overall

565

Males

527

M18-39

527

5K→10K

3.1 - 6.2 mi

Top 1%
×5stories
+79ft-138ft

Overall

286

Males

257

M18-39

257

10K→15K

6.2 - 9.3 mi

Top 2%
×3stories
+67ft-78ft

Overall

565

Males

527

M18-39

527

15K→20K

9.3 - 12.4 mi

Top 7%
×5stories
+106ft-86ft

Overall

2083

Males

1987

M18-39

1987

20K→Half

12.4 - 13.1 mi

Top 9%
×2stories
+19ft-37ft

Overall

2576

Males

2465

M18-39

2465

Half→25K

13.1 - 15.5 mi

Top 17%
×4stories
+66ft-88ft

Overall

4703

Males

4332

M18-39

4332

25K→30K

15.5 - 18.6 mi

Top 24%
×9stories
+181ft-148ft

Overall

6841

Males

5870

M18-39

5870

30K→20M

18.6 - 20.0 mi

Top 76%
×5stories
+64ft-50ft

Overall

21602

Males

12858

M18-39

12858

20M→21M

20.0 - 21.0 mi

Top 8%
×8stories
+106ft-24ft

Overall

2214

Males

2070

M18-39

2070

21M→35K

21.0 - 21.8 mi

Top 13%
×7stories
+17ft-86ft

Overall

3555

Males

3228

M18-39

3228

35K→23M

21.8 - 23.0 mi

Top 11%
×5stories
+23ft-63ft

Overall

3063

Males

2802

M18-39

2802

23M→24M

23.0 - 24.0 mi

Top 10%
×6stories
+12ft-82ft

Overall

2733

Males

2507

M18-39

2507

24M→40K

24.0 - 24.9 mi

Top 9%
×1story
+6ft-20ft

Overall

2601

Males

2369

M18-39

2369

40K→25.2M

24.9 - 25.2 mi

Top 15%
×1story
+13ft-16ft

Overall

4258

Males

3614

M18-39

3614

25.2M→Finish

25.2 - 26.2 mi

Top 13%
×2stories
+22ft-21ft

Overall

3733

Males

3238

M18-39

3238

Passing Analysis

Category:
Athletes Passed
319
Passed By
2746
Net Change
-2427
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#230
5K → 10K530-25#230#255
10K → 15K167-66#255#321
15K → 20K0214-214#321#535
20K → Half051-51#535#586
Half → 25K2314-312#586#898
25K → 30K0640-640#898#1538
30K → 20M01243-1243#1538#2781
20M → 21M7713+64#2781#2717
21M → 35K2428-4#2717#2721
35K → 23M6247+15#2721#2706
23M → 24M6720+47#2706#2659
24M → 40K4423+21#2659#2638
40K → 25.2M822-14#2638#2652
25.2M → Finish2934-5#2652#2657
TOTALS3192746-2427
📊

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