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BOSTON MARATHON 2025

Robert Chacon

Bib: 3931•M

IL

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 14%
Gender (Male)
#0 / 16105
Top 23%
Division (M18-39)
#0 / 5642
Top 47%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:38
Rank: #7510
Start → 5K
21:38 | 6:58/mi
10K· 6.21 mi
43:02
Rank: #7332 (+178)
5K → 10K
21:24 | 6:53/mi
15K· 9.32 mi
1:04:16
Rank: #7022 (+310)
10K → 15K
21:14 | 6:50/mi
20K· 12.43 mi
1:25:24
Rank: #6594 (+428)
15K → 20K
21:08 | 6:48/mi
Half· 13.11 mi
1:29:52
Rank: #6457 (+137)
20K → Half
4:28 | 6:33/mi
25K· 15.53 mi
1:46:07
Rank: #5987 (+470)
Half → 25K
16:15 | 6:42/mi
30K· 18.64 mi
2:07:09
Rank: #5337 (+650)
25K → 30K
21:02 | 6:46/mi
20M
2:16:30
Rank: #5135 (+202)
30K → 20M
9:21 | 6:53/mi
21M
2:23:28
Rank: #4868 (+267)
20M → 21M
6:58 | 6:58/mi
35K· 21.75 mi
2:28:24
Rank: #4739 (+129)
21M → 35K
4:56 | 6:36/mi
23M
2:36:52
Rank: #4538 (+201)
35K → 23M
8:28 | 6:46/mi
24M
2:43:21
Rank: #4358 (+180)
23M → 24M
6:29 | 6:29/mi
40K· 24.85 mi
2:48:55
Rank: #4190 (+168)
24M → 40K
5:34 | 6:31/mi
25.2M
2:51:19
Rank: #4113 (+77)
40K → 25.2M
2:24 | 6:58/mi
Finish· 26.22 mi
2:57:44
Rank: #3960 (+153)
25.2M → Finish
6:25 | 6:18/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:29:52
Pace6:51 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:27:52
Pace6:42 /mi
📊Negative Split: 2.2% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:47:5421:386:5821:38
6:58
-
10K
6.21 mi11:09:1843:026:5621:24
6:53
-0:05
15K
9.32 mi11:30:321:04:166:5421:14
6:50
-0:03
20K
12.43 mi11:51:401:25:246:5221:08
6:48
-0:02
Half
13.11 mi11:56:081:29:526:514:28
6:33
-0:15
25K
15.53 mi12:12:231:46:076:5016:15
6:42
+0:09
30K
18.64 mi12:33:252:07:096:4921:02
6:46
+0:04
20M
20.00 mi12:42:462:16:306:499:21
6:53
+0:07
21M
21.00 mi12:49:442:23:286:506:58
6:58
+0:05
35K
21.75 mi12:54:402:28:246:494:56
6:36
-0:22
23M
23.00 mi13:03:082:36:526:498:28
6:46
+0:10
24M
24.00 mi13:09:372:43:216:486:29
6:29
-0:17
40K
24.85 mi13:15:112:48:556:485:34
6:31
+0:02
25.2M
25.20 mi13:17:352:51:196:482:24
6:58
+0:27
Finish
26.22 mi13:24:002:57:446:476:25
6:18
-0:40

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

6:18 /mi

Average Pace

6:47 /mi

Slowest Pace

6:58 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:26:44

83% of race

Time at Steady Pace

31:00

17% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:47 /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 mi10:47:5421:386:5821:38
6:58
#7510
10K
6.21 mi11:09:1843:026:5621:24
6:53
#7332
15K
9.32 mi11:30:321:04:166:5421:14
6:50
#7022
20K
12.43 mi11:51:401:25:246:5221:08
6:48
#6594
Half
13.11 mi11:56:081:29:526:514:28
6:33
#6457
25K
15.53 mi12:12:231:46:076:5016:15
6:42
#5987
30K
18.64 mi12:33:252:07:096:4921:02
6:46
#5337
20M
20.00 mi12:42:462:16:306:499:21
6:53
#5135
21M
21.00 mi12:49:442:23:286:506:58
6:58
#4868
35K
21.75 mi12:54:402:28:246:494:56
6:36
#4739
23M
23.00 mi13:03:082:36:526:498:28
6:46
#4538
24M
24.00 mi13:09:372:43:216:486:29
6:29
#4358
40K
24.85 mi13:15:112:48:556:485:34
6:31
#4190
25.2M
25.20 mi13:17:352:51:196:482:24
6:58
#4113
Finish
26.22 mi13:24:002:57:446:476:25
6:18
#3960
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi7510667866786412(Top 23%)5795(Top 36%)5795(Top 103%)
10K6.21 mi3.10 mi7332+1786536+1426536+1427129(Top 25%)6372(Top 40%)6372(Top 113%)
15K9.32 mi3.11 mi7022+3106302+2346302+2346412(Top 23%)5795(Top 36%)5795(Top 103%)
20K12.43 mi3.11 mi6594+4285956+3465956+3465293(Top 19%)4859(Top 30%)4859(Top 86%)
Half13.11 mi0.68 mi6457+1375841+1155841+1153970(Top 14%)3734(Top 23%)3734(Top 66%)
25K15.53 mi2.42 mi5987+4705446+3955446+3954139(Top 15%)3851(Top 24%)3851(Top 68%)
30K18.64 mi3.11 mi5337+6504899+5474899+5473255(Top 11%)3048(Top 19%)3048(Top 54%)
20M20.00 mi1.36 mi5135+2024719+1804719+1803382(Top 12%)3128(Top 19%)3128(Top 55%)
21M21.00 mi1.00 mi4868+2674490+2294490+2292130(Top 7%)1995(Top 12%)1995(Top 35%)
35K21.75 mi0.75 mi4739+1294372+1184372+1182918(Top 10%)2690(Top 17%)2690(Top 48%)
23M23.00 mi1.25 mi4538+2014186+1864186+1862520(Top 9%)2331(Top 14%)2331(Top 41%)
24M24.00 mi1.00 mi4358+1804025+1614025+1611978(Top 7%)1835(Top 11%)1835(Top 33%)
40K24.85 mi0.85 mi4190+1683871+1543871+1541647(Top 6%)1523(Top 9%)1523(Top 27%)
25.2M25.20 mi0.35 mi4113+773799+723799+721379(Top 5%)1266(Top 8%)1266(Top 22%)
Finish26.22 mi1.02 mi3960+1533659+1403659+1401871(Top 7%)1726(Top 11%)1726(Top 31%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 23%
×21stories
+97ft-345ft

Overall

6412

Males

5795

M18-39

5795

5K→10K

3.1 - 6.2 mi

Top 25%
×5stories
+79ft-138ft

Overall

7129

Males

6372

M18-39

6372

10K→15K

6.2 - 9.3 mi

Top 23%
×3stories
+67ft-78ft

Overall

6412

Males

5795

M18-39

5795

15K→20K

9.3 - 12.4 mi

Top 19%
×5stories
+106ft-86ft

Overall

5293

Males

4859

M18-39

4859

20K→Half

12.4 - 13.1 mi

Top 14%
×2stories
+19ft-37ft

Overall

3970

Males

3734

M18-39

3734

Half→25K

13.1 - 15.5 mi

Top 15%
×4stories
+66ft-88ft

Overall

4139

Males

3851

M18-39

3851

25K→30K

15.5 - 18.6 mi

Top 11%
×9stories
+181ft-148ft

Overall

3255

Males

3048

M18-39

3048

30K→20M

18.6 - 20.0 mi

Top 12%
×5stories
+64ft-50ft

Overall

3382

Males

3128

M18-39

3128

20M→21M

20.0 - 21.0 mi

Top 7%
×8stories
+106ft-24ft

Overall

2130

Males

1995

M18-39

1995

21M→35K

21.0 - 21.8 mi

Top 10%
×7stories
+17ft-86ft

Overall

2918

Males

2690

M18-39

2690

35K→23M

21.8 - 23.0 mi

Top 9%
×5stories
+23ft-63ft

Overall

2520

Males

2331

M18-39

2331

23M→24M

23.0 - 24.0 mi

Top 7%
×6stories
+12ft-82ft

Overall

1978

Males

1835

M18-39

1835

24M→40K

24.0 - 24.9 mi

Top 6%
×1story
+6ft-20ft

Overall

1647

Males

1523

M18-39

1523

40K→25.2M

24.9 - 25.2 mi

Top 5%
×1story
+13ft-16ft

Overall

1379

Males

1266

M18-39

1266

25.2M→Finish

25.2 - 26.2 mi

Top 7%
×2stories
+22ft-21ft

Overall

1871

Males

1726

M18-39

1726

Passing Analysis

Category:
Athletes Passed
3727
Passed By
177
Net Change
+3550
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7510
5K → 10K298120+178#7510#7332
10K → 15K33525+310#7332#7022
15K → 20K4368+428#7022#6594
20K → Half1370+137#6594#6457
Half → 25K4711+470#6457#5987
25K → 30K6522+650#5987#5337
30K → 20M2020+202#5337#5135
20M → 21M2714+267#5135#4868
21M → 35K1312+129#4868#4739
35K → 23M2065+201#4739#4538
23M → 24M1811+180#4538#4358
24M → 40K1724+168#4358#4190
40K → 25.2M770+77#4190#4113
25.2M → Finish1585+153#4113#3960
TOTALS3727177+3550
📊

Passing Visuals

Category:

📈Position Graph

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🎨Heatmap Timeline

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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