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BOSTON MARATHON 2025

Nicolas Lazo

Bib: 30837•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M55-59)
#0 / 1648
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
29:07
Rank: #23816
Start → 5K
29:07 | 9:22/mi
10K· 6.21 mi
57:24
Rank: #23334 (+482)
5K → 10K
28:17 | 9:06/mi
15K· 9.32 mi
1:25:50
Rank: #23149 (+185)
10K → 15K
28:26 | 9:09/mi
20K· 12.43 mi
1:54:27
Rank: #22824 (+325)
15K → 20K
28:37 | 9:13/mi
Half· 13.11 mi
2:00:45
Rank: #22822 (+2)
20K → Half
6:18 | 9:14/mi
25K· 15.53 mi
2:23:50
Rank: #22647 (+175)
Half → 25K
23:05 | 9:31/mi
30K· 18.64 mi
2:55:59
Rank: #22636 (+11)
25K → 30K
32:09 | 10:21/mi
20M
3:10:33
Rank: #22645 (-9)
30K → 20M
14:34 | 10:43/mi
21M
3:22:31
Rank: #22701 (-56)
20M → 21M
11:58 | 11:58/mi
35K· 21.75 mi
3:30:45
Rank: #22767 (-66)
21M → 35K
8:14 | 11:00/mi
23M
3:45:19
Rank: #22877 (-110)
35K → 23M
14:34 | 11:38/mi
24M
4:00:58
Rank: #23478 (-601)
23M → 24M
15:39 | 15:39/mi
40K· 24.85 mi
4:15:38
Rank: #24042 (-564)
24M → 40K
14:40 | 17:09/mi
25.2M
4:19:58
Rank: #24059 (-17)
40K → 25.2M
4:20 | 12:34/mi
Finish· 26.22 mi
4:30:55
Rank: #24099 (-40)
25.2M → Finish
10:57 | 10:45/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:00:45
Pace9:13 /mi
2nd Half
Distance13.11 mi
Time2:30:10
Pace11:27 /mi
📊Positive Split: 24.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:51:2529:079:2229:07
9:22
-
10K
6.21 mi12:19:4257:249:1428:17
9:06
-0:16
15K
9.32 mi12:48:081:25:509:1328:26
9:09
+0:03
20K
12.43 mi13:16:451:54:279:1328:37
9:13
+0:04
Half
13.11 mi13:23:032:00:459:136:18
9:14
+0:01
25K
15.53 mi13:46:082:23:509:1623:05
9:31
+0:17
30K
18.64 mi14:18:172:55:599:2632:09
10:21
+0:50
20M
20.00 mi14:32:513:10:339:3214:34
10:43
+0:22
21M
21.00 mi14:44:493:22:319:3911:58
11:58
+1:15
35K
21.75 mi14:53:033:30:459:418:14
11:00
-0:58
23M
23.00 mi15:07:373:45:199:4814:34
11:38
+0:38
24M
24.00 mi15:23:164:00:5810:0215:39
15:39
+4:01
40K
24.85 mi15:37:564:15:3810:1714:40
17:09
+1:30
25.2M
25.20 mi15:42:164:19:5810:194:20
12:34
-4:35
Finish
26.22 mi15:53:134:30:5510:2010:57
10:45
-1:49

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

9:06 /mi

Average Pace

10:20 /mi

Slowest Pace

17:09 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:23:50

53% of race

Time at Steady Pace

1:20:28

30% of race

Time at Slower Pace

46:37

17% of race

Average Pace: 10:20 /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 mi11:51:2529:079:2229:07
9:22
#23816
10K
6.21 mi12:19:4257:249:1428:17
9:06
#23334
15K
9.32 mi12:48:081:25:509:1328:26
9:09
#23149
20K
12.43 mi13:16:451:54:279:1328:37
9:13
#22824
Half
13.11 mi13:23:032:00:459:136:18
9:14
#22822
25K
15.53 mi13:46:082:23:509:1623:05
9:31
#22647
30K
18.64 mi14:18:172:55:599:2632:09
10:21
#22636
20M
20.00 mi14:32:513:10:339:3214:34
10:43
#22645
21M
21.00 mi14:44:493:22:319:3911:58
11:58
#22701
35K
21.75 mi14:53:033:30:459:418:14
11:00
#22767
23M
23.00 mi15:07:373:45:199:4814:34
11:38
#22877
24M
24.00 mi15:23:164:00:5810:0215:39
15:39
#23478
40K
24.85 mi15:37:564:15:3810:1714:40
17:09
#24042
25.2M
25.20 mi15:42:164:19:5810:194:20
12:34
#24059
Finish
26.22 mi15:53:134:30:5510:2010:57
10:45
#24099
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi23816141591415922666(Top 80%)13679(Top 85%)13679(Top 830%)
10K6.21 mi3.10 mi23334+48213939+22013939+22022832(Top 80%)13737(Top 85%)13737(Top 834%)
15K9.32 mi3.11 mi23149+18513871+6813871+6822666(Top 80%)13679(Top 85%)13679(Top 830%)
20K12.43 mi3.11 mi22824+32513740+13113740+13121931(Top 77%)13328(Top 83%)13328(Top 809%)
Half13.11 mi0.68 mi22822+213737+313737+322732(Top 80%)13679(Top 85%)13679(Top 830%)
25K15.53 mi2.42 mi22647+17513637+10013637+10021930(Top 77%)13260(Top 82%)13260(Top 805%)
30K18.64 mi3.11 mi22636+1113588+4913588+4922588(Top 80%)13430(Top 83%)13430(Top 815%)
20M20.00 mi1.36 mi22645-913573+1513573+1522995(Top 81%)13521(Top 84%)13521(Top 820%)
21M21.00 mi1.00 mi22701-5613582-913582-923537(Top 83%)13700(Top 85%)13700(Top 831%)
35K21.75 mi0.75 mi22767-6613595-1313595-1324205(Top 85%)13973(Top 87%)13973(Top 848%)
23M23.00 mi1.25 mi22877-11013620-2513620-2524473(Top 86%)14077(Top 87%)14077(Top 854%)
24M24.00 mi1.00 mi23478-60113891-27113891-27128170(Top 99%)15936(Top 99%)15936(Top 967%)
40K24.85 mi0.85 mi24042-56414134-24314134-24328257(Top 99%)16006(Top 99%)16006(Top 971%)
25.2M25.20 mi0.35 mi24059-1714135-114135-124311(Top 86%)13925(Top 86%)13925(Top 845%)
Finish26.22 mi1.02 mi24099-4014151-1614151-1624833(Top 87%)14190(Top 88%)14190(Top 861%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 80%
×21stories
+97ft-345ft

Overall

22666

Males

13679

M55-59

13679

5K→10K

3.1 - 6.2 mi

Top 80%
×5stories
+79ft-138ft

Overall

22832

Males

13737

M55-59

13737

10K→15K

6.2 - 9.3 mi

Top 80%
×3stories
+67ft-78ft

Overall

22666

Males

13679

M55-59

13679

15K→20K

9.3 - 12.4 mi

Top 77%
×5stories
+106ft-86ft

Overall

21931

Males

13328

M55-59

13328

20K→Half

12.4 - 13.1 mi

Top 80%
×2stories
+19ft-37ft

Overall

22732

Males

13679

M55-59

13679

Half→25K

13.1 - 15.5 mi

Top 77%
×4stories
+66ft-88ft

Overall

21930

Males

13260

M55-59

13260

25K→30K

15.5 - 18.6 mi

Top 80%
×9stories
+181ft-148ft

Overall

22588

Males

13430

M55-59

13430

30K→20M

18.6 - 20.0 mi

Top 81%
×5stories
+64ft-50ft

Overall

22995

Males

13521

M55-59

13521

20M→21M

20.0 - 21.0 mi

Top 83%
×8stories
+106ft-24ft

Overall

23537

Males

13700

M55-59

13700

21M→35K

21.0 - 21.8 mi

Top 85%
×7stories
+17ft-86ft

Overall

24205

Males

13973

M55-59

13973

35K→23M

21.8 - 23.0 mi

Top 86%
×5stories
+23ft-63ft

Overall

24473

Males

14077

M55-59

14077

23M→24M

23.0 - 24.0 mi

Top 99%
×6stories
+12ft-82ft

Overall

28170

Males

15936

M55-59

15936

24M→40K

24.0 - 24.9 mi

Top 99%
×1story
+6ft-20ft

Overall

28257

Males

16006

M55-59

16006

40K→25.2M

24.9 - 25.2 mi

Top 86%
×1story
+13ft-16ft

Overall

24311

Males

13925

M55-59

13925

25.2M→Finish

25.2 - 26.2 mi

Top 87%
×2stories
+22ft-21ft

Overall

24833

Males

14190

M55-59

14190

Passing Analysis

Category:
Athletes Passed
1871
Passed By
2154
Net Change
-283
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23816
5K → 10K55371+482#23816#23334
10K → 15K286101+185#23334#23149
15K → 20K35934+325#23149#22824
20K → Half3533+2#22824#22822
Half → 25K22954+175#22822#22647
25K → 30K177166+11#22647#22636
30K → 20M7180-9#22636#22645
20M → 21M55111-56#22645#22701
21M → 35K34100-66#22701#22767
35K → 23M35145-110#22767#22877
23M → 24M7608-601#22877#23478
24M → 40K0564-564#23478#24042
40K → 25.2M1330-17#24042#24059
25.2M → Finish1757-40#24059#24099
TOTALS18712154-283
📊

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