Boston Marathon logo
BOSTON MARATHON 2025

James Chaves

Bib: 8786•M

MA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Top 33%
Gender (Male)
#0 / 16105
Top 46%
Masters (Masters Men)
#0 / 10463
Top 34%
Division (M50-54)
#0 / 1996
Top 34%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:08
Rank: #6333
Start → 5K
6:48/mi
21:08 split
10K· 6.21 mi
42:36
Rank: #6803 (-470)
5K → 10K
6:55/mi
21:28 split
15K· 9.32 mi
1:04:12
Rank: #6983 (-180)
10K → 15K
6:57/mi
21:36 split
20K· 12.43 mi
1:26:02
Rank: #7015 (-32)
15K → 20K
7:02/mi
21:50 split
Half· 13.11 mi
1:30:44
Rank: #6997 (+18)
20K → Half
6:53/mi
4:42 split
25K· 15.53 mi
1:48:15
Rank: #7053 (-56)
Half → 25K
7:13/mi
17:31 split
30K· 18.64 mi
2:12:43
Rank: #7468 (-415)
25K → 30K
7:53/mi
24:28 split
20M
2:23:37
Rank: #7619 (-151)
30K → 20M
8:01/mi
10:54 split
21M
2:32:19
Rank: #7771 (-152)
20M → 21M
8:42/mi
8:42 split
35K· 21.75 mi
2:38:07
Rank: #7833 (-62)
21M → 35K
7:45/mi
5:48 split
23M
2:48:47
Rank: #8130 (-297)
35K → 23M
8:31/mi
10:40 split
24M
2:57:22
Rank: #8428 (-298)
23M → 24M
8:35/mi
8:35 split
40K· 24.85 mi
3:04:58
Rank: #8730 (-302)
24M → 40K
8:53/mi
7:36 split
25.2M
3:08:19
Rank: #8854 (-124)
40K → 25.2M
9:43/mi
3:21 split
Finish· 26.22 mi
3:17:07
Rank: #9243 (-389)
25.2M → Finish
8:38/mi
8:48 split

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
Time1:30:44
Pace6:55 /mi
2nd Half
Distance13.11 mi
Time1:46:23
Pace8:07 /mi
📊Positive Split: 17.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:46:5521:086:4821:08
6:48
-
10K
6.21 mi11:08:2342:366:5121:28
6:55
+0:07
15K
9.32 mi11:29:591:04:126:5321:36
6:57
+0:02
20K
12.43 mi11:51:491:26:026:5521:50
7:02
+0:05
Half
13.11 mi11:56:311:30:446:554:42
6:53
-0:09
25K
15.53 mi12:14:021:48:156:5817:31
7:13
+0:20
30K
18.64 mi12:38:302:12:437:0724:28
7:53
+0:40
20M
20.00 mi12:49:242:23:377:1110:54
8:01
+0:08
21M
21.00 mi12:58:062:32:197:158:42
8:42
+0:41
35K
21.75 mi13:03:542:38:077:165:48
7:45
-0:57
23M
23.00 mi13:14:342:48:477:2010:40
8:31
+0:46
24M
24.00 mi13:23:092:57:227:238:35
8:35
+0:04
40K
24.85 mi13:30:453:04:587:277:36
8:53
+0:18
25.2M
25.20 mi13:34:063:08:197:283:21
9:43
+0:50
Finish
26.22 mi13:42:543:17:077:318:48
8:38
-1:05

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

6:48 /mi

Average Pace

7:31 /mi

Slowest Pace

9:43 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:48:15

55% of race

Time at Steady Pace

41:10

21% of race

Time at Slower Pace

47:42

24% of race

Average Pace: 7:31 /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 mi10:46:5521:086:4821:08
6:48
#6333
10K
6.21 mi11:08:2342:366:5121:28
6:55
#6803
15K
9.32 mi11:29:591:04:126:5321:36
6:57
#6983
20K
12.43 mi11:51:491:26:026:5521:50
7:02
#7015
Half
13.11 mi11:56:311:30:446:554:42
6:53
#6997
25K
15.53 mi12:14:021:48:156:5817:31
7:13
#7053
30K
18.64 mi12:38:302:12:437:0724:28
7:53
#7468
20M
20.00 mi12:49:242:23:377:1110:54
8:01
#7619
21M
21.00 mi12:58:062:32:197:158:42
8:42
#7771
35K
21.75 mi13:03:542:38:077:165:48
7:45
#7833
23M
23.00 mi13:14:342:48:477:2010:40
8:31
#8130
24M
24.00 mi13:23:092:57:227:238:35
8:35
#8428
40K
24.85 mi13:30:453:04:587:277:36
8:53
#8730
25.2M
25.20 mi13:34:063:08:197:283:21
9:43
#8854
Finish
26.22 mi13:42:543:17:077:318:48
8:38
#9243
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi6333578857887322(Top 26%)6493(Top 40%)6493(Top 325%)
10K6.21 mi3.10 mi6803-4706143-3556143-3557302(Top 26%)6511(Top 40%)6511(Top 326%)
15K9.32 mi3.11 mi6983-1806273-1306273-1307322(Top 26%)6493(Top 40%)6493(Top 325%)
20K12.43 mi3.11 mi7015-326286-136286-137048(Top 25%)6240(Top 39%)6240(Top 313%)
Half13.11 mi0.68 mi6997+186270+166270+166844(Top 24%)6109(Top 38%)6109(Top 306%)
25K15.53 mi2.42 mi7053-566296-266296-267782(Top 27%)6629(Top 41%)6629(Top 332%)
30K18.64 mi3.11 mi7468-4156545-2496545-24910441(Top 37%)7899(Top 49%)7899(Top 396%)
20M20.00 mi1.36 mi7619-1516605-606605-6010559(Top 37%)7812(Top 49%)7812(Top 391%)
21M21.00 mi1.00 mi7771-1526665-606665-6011636(Top 41%)8186(Top 51%)8186(Top 410%)
35K21.75 mi0.75 mi7833-626681-166681-1610417(Top 37%)7571(Top 47%)7571(Top 379%)
23M23.00 mi1.25 mi8130-2976820-1396820-13913392(Top 47%)8877(Top 55%)8877(Top 445%)
24M24.00 mi1.00 mi8428-2986968-1486968-14815011(Top 53%)9580(Top 59%)9580(Top 480%)
40K24.85 mi0.85 mi8730-3027108-1407108-14015642(Top 55%)9721(Top 60%)9721(Top 487%)
25.2M25.20 mi0.35 mi8854-1247166-587166-5815586(Top 55%)9652(Top 60%)9652(Top 484%)
Finish26.22 mi1.02 mi9243-3897342-1767342-17617028(Top 60%)10393(Top 65%)10393(Top 521%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 26%
×21stories
+97ft-345ft

Overall

7322

Males

6493

M50-54

6493

5K→10K

3.1 - 6.2 mi

Top 26%
×5stories
+79ft-138ft

Overall

7302

Males

6511

M50-54

6511

10K→15K

6.2 - 9.3 mi

Top 26%
×3stories
+67ft-78ft

Overall

7322

Males

6493

M50-54

6493

15K→20K

9.3 - 12.4 mi

Top 25%
×5stories
+106ft-86ft

Overall

7048

Males

6240

M50-54

6240

20K→Half

12.4 - 13.1 mi

Top 24%
×2stories
+19ft-37ft

Overall

6844

Males

6109

M50-54

6109

Half→25K

13.1 - 15.5 mi

Top 27%
×4stories
+66ft-88ft

Overall

7782

Males

6629

M50-54

6629

25K→30K

15.5 - 18.6 mi

Top 37%
×9stories
+181ft-148ft

Overall

10441

Males

7899

M50-54

7899

30K→20M

18.6 - 20.0 mi

Top 37%
×5stories
+64ft-50ft

Overall

10559

Males

7812

M50-54

7812

20M→21M

20.0 - 21.0 mi

Top 41%
×8stories
+106ft-24ft

Overall

11636

Males

8186

M50-54

8186

21M→35K

21.0 - 21.8 mi

Top 37%
×7stories
+17ft-86ft

Overall

10417

Males

7571

M50-54

7571

35K→23M

21.8 - 23.0 mi

Top 47%
×5stories
+23ft-63ft

Overall

13392

Males

8877

M50-54

8877

23M→24M

23.0 - 24.0 mi

Top 53%
×6stories
+12ft-82ft

Overall

15011

Males

9580

M50-54

9580

24M→40K

24.0 - 24.9 mi

Top 55%
×1story
+6ft-20ft

Overall

15642

Males

9721

M50-54

9721

40K→25.2M

24.9 - 25.2 mi

Top 55%
×1story
+13ft-16ft

Overall

15586

Males

9652

M50-54

9652

25.2M→Finish

25.2 - 26.2 mi

Top 60%
×2stories
+22ft-21ft

Overall

17028

Males

10393

M50-54

10393

Passing Analysis

Category:
Athletes Passed
785
Passed By
3695
Net Change
-2910
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6333
5K → 10K63533-470#6333#6803
10K → 15K84264-180#6803#6983
15K → 20K138170-32#6983#7015
20K → Half3820+18#7015#6997
Half → 25K99155-56#6997#7053
25K → 30K81496-415#7053#7468
30K → 20M62213-151#7468#7619
20M → 21M53205-152#7619#7771
21M → 35K45107-62#7771#7833
35K → 23M44341-297#7833#8130
23M → 24M28326-298#8130#8428
24M → 40K27329-302#8428#8730
40K → 25.2M9133-124#8730#8854
25.2M → Finish14403-389#8854#9243
TOTALS7853695-2910
📊

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