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BOSTON MARATHON 2025

Giancarlo Fierro

Bib: 12435•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M45-49)
#0 / 2386
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:02
Rank: #17057
Start → 5K
25:02 | 8:03/mi
10K· 6.21 mi
50:32
Rank: #17501 (-444)
5K → 10K
25:30 | 8:12/mi
15K· 9.32 mi
1:17:23
Rank: #18410 (-909)
10K → 15K
26:51 | 8:39/mi
20K· 12.43 mi
1:45:17
Rank: #19085 (-675)
15K → 20K
27:54 | 8:59/mi
Half· 13.11 mi
1:51:08
Rank: #19109 (-24)
20K → Half
5:51 | 8:34/mi
25K· 15.53 mi
2:12:18
Rank: #19005 (+104)
Half → 25K
21:10 | 8:44/mi
30K· 18.64 mi
2:40:42
Rank: #18874 (+131)
25K → 30K
28:24 | 9:08/mi
20M
2:52:33
Rank: #18581 (+293)
30K → 20M
11:51 | 8:43/mi
21M
3:02:07
Rank: #18432 (+149)
20M → 21M
9:34 | 9:34/mi
35K· 21.75 mi
3:08:46
Rank: #18409 (+23)
21M → 35K
6:39 | 8:53/mi
23M
3:19:57
Rank: #18251 (+158)
35K → 23M
11:11 | 8:56/mi
24M
3:29:10
Rank: #18238 (+13)
23M → 24M
9:13 | 9:13/mi
40K· 24.85 mi
3:36:42
Rank: #18132 (+106)
24M → 40K
7:32 | 8:49/mi
25.2M
3:40:01
Rank: #18081 (+51)
40K → 25.2M
3:19 | 9:37/mi
Finish· 26.22 mi
3:48:38
Rank: #17991 (+90)
25.2M → Finish
8:37 | 8:27/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:51:08
Pace8:29 /mi
2nd Half
Distance13.11 mi
Time1:57:30
Pace8:58 /mi
📊Positive Split: 5.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:53:2525:028:0325:02
8:03
-
10K
6.21 mi11:18:5550:328:0825:30
8:12
+0:09
15K
9.32 mi11:45:461:17:238:1826:51
8:39
+0:27
20K
12.43 mi12:13:401:45:178:2827:54
8:59
+0:20
Half
13.11 mi12:19:311:51:088:295:51
8:34
-0:25
25K
15.53 mi12:40:412:12:188:3121:10
8:44
+0:10
30K
18.64 mi13:09:052:40:428:3728:24
9:08
+0:24
20M
20.00 mi13:20:562:52:338:3811:51
8:43
-0:25
21M
21.00 mi13:30:303:02:078:409:34
9:34
+0:51
35K
21.75 mi13:37:093:08:468:416:39
8:53
-0:41
23M
23.00 mi13:48:203:19:578:4211:11
8:56
+0:03
24M
24.00 mi13:57:333:29:108:439:13
9:13
+0:17
40K
24.85 mi14:05:053:36:428:437:32
8:49
-0:24
25.2M
25.20 mi14:08:243:40:018:443:19
9:37
+0:48
Finish
26.22 mi14:17:013:48:388:448:37
8:27
-1:10

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

8:03 /mi

Average Pace

8:44 /mi

Slowest Pace

9:37 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:12:24

58% of race

Time at Steady Pace

1:23:21

36% of race

Time at Slower Pace

12:53

6% of race

Average Pace: 8:43 /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 mi10:53:2525:028:0325:02
8:03
#17057
10K
6.21 mi11:18:5550:328:0825:30
8:12
#17501
15K
9.32 mi11:45:461:17:238:1826:51
8:39
#18410
20K
12.43 mi12:13:401:45:178:2827:54
8:59
#19085
Half
13.11 mi12:19:311:51:088:295:51
8:34
#19109
25K
15.53 mi12:40:412:12:188:3121:10
8:44
#19005
30K
18.64 mi13:09:052:40:428:3728:24
9:08
#18874
20M
20.00 mi13:20:562:52:338:3811:51
8:43
#18581
21M
21.00 mi13:30:303:02:078:409:34
9:34
#18432
35K
21.75 mi13:37:093:08:468:416:39
8:53
#18409
23M
23.00 mi13:48:203:19:578:4211:11
8:56
#18251
24M
24.00 mi13:57:333:29:108:439:13
9:13
#18238
40K
24.85 mi14:05:053:36:428:437:32
8:49
#18132
25.2M
25.20 mi14:08:243:40:018:443:19
9:37
#18081
Finish
26.22 mi14:17:013:48:388:448:37
8:27
#17991
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi17057112401124020153(Top 71%)12575(Top 78%)12575(Top 527%)
10K6.21 mi3.10 mi17501-44411414-17411414-17417941(Top 63%)11634(Top 72%)11634(Top 488%)
15K9.32 mi3.11 mi18410-90911784-37011784-37020153(Top 71%)12575(Top 78%)12575(Top 527%)
20K12.43 mi3.11 mi19085-67512078-29412078-29420846(Top 73%)12817(Top 80%)12817(Top 537%)
Half13.11 mi0.68 mi19109-2412083-512083-519623(Top 69%)12297(Top 76%)12297(Top 515%)
25K15.53 mi2.42 mi19005+10412030+5312030+5318555(Top 65%)11766(Top 73%)11766(Top 493%)
30K18.64 mi3.11 mi18874+13111948+8211948+8218348(Top 65%)11536(Top 72%)11536(Top 483%)
20M20.00 mi1.36 mi18581+29311799+14911799+14915187(Top 53%)10011(Top 62%)10011(Top 420%)
21M21.00 mi1.00 mi18432+14911691+10811691+10816367(Top 58%)10417(Top 65%)10417(Top 437%)
35K21.75 mi0.75 mi18409+2311672+1911672+1917683(Top 62%)10909(Top 68%)10909(Top 457%)
23M23.00 mi1.25 mi18251+15811571+10111571+10115872(Top 56%)10020(Top 62%)10020(Top 420%)
24M24.00 mi1.00 mi18238+1311538+3311538+3318408(Top 65%)11109(Top 69%)11109(Top 466%)
40K24.85 mi0.85 mi18132+10611464+7411464+7415241(Top 54%)9552(Top 59%)9552(Top 400%)
25.2M25.20 mi0.35 mi18081+5111433+3111433+3115164(Top 53%)9503(Top 59%)9503(Top 398%)
Finish26.22 mi1.02 mi17991+9011378+5511378+5515926(Top 56%)9908(Top 62%)9908(Top 415%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 71%
×21stories
+97ft-345ft

Overall

20153

Males

12575

M45-49

12575

5K→10K

3.1 - 6.2 mi

Top 63%
×5stories
+79ft-138ft

Overall

17941

Males

11634

M45-49

11634

10K→15K

6.2 - 9.3 mi

Top 71%
×3stories
+67ft-78ft

Overall

20153

Males

12575

M45-49

12575

15K→20K

9.3 - 12.4 mi

Top 73%
×5stories
+106ft-86ft

Overall

20846

Males

12817

M45-49

12817

20K→Half

12.4 - 13.1 mi

Top 69%
×2stories
+19ft-37ft

Overall

19623

Males

12297

M45-49

12297

Half→25K

13.1 - 15.5 mi

Top 65%
×4stories
+66ft-88ft

Overall

18555

Males

11766

M45-49

11766

25K→30K

15.5 - 18.6 mi

Top 65%
×9stories
+181ft-148ft

Overall

18348

Males

11536

M45-49

11536

30K→20M

18.6 - 20.0 mi

Top 53%
×5stories
+64ft-50ft

Overall

15187

Males

10011

M45-49

10011

20M→21M

20.0 - 21.0 mi

Top 58%
×8stories
+106ft-24ft

Overall

16367

Males

10417

M45-49

10417

21M→35K

21.0 - 21.8 mi

Top 62%
×7stories
+17ft-86ft

Overall

17683

Males

10909

M45-49

10909

35K→23M

21.8 - 23.0 mi

Top 56%
×5stories
+23ft-63ft

Overall

15872

Males

10020

M45-49

10020

23M→24M

23.0 - 24.0 mi

Top 65%
×6stories
+12ft-82ft

Overall

18408

Males

11109

M45-49

11109

24M→40K

24.0 - 24.9 mi

Top 54%
×1story
+6ft-20ft

Overall

15241

Males

9552

M45-49

9552

40K→25.2M

24.9 - 25.2 mi

Top 53%
×1story
+13ft-16ft

Overall

15164

Males

9503

M45-49

9503

25.2M→Finish

25.2 - 26.2 mi

Top 56%
×2stories
+22ft-21ft

Overall

15926

Males

9908

M45-49

9908

Passing Analysis

Category:
Athletes Passed
1866
Passed By
2800
Net Change
-934
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17057
5K → 10K137581-444#17057#17501
10K → 15K37946-909#17501#18410
15K → 20K63738-675#18410#19085
20K → Half2549-24#19085#19109
Half → 25K212108+104#19109#19005
25K → 30K290159+131#19005#18874
30K → 20M2974+293#18874#18581
20M → 21M17930+149#18581#18432
21M → 35K6138+23#18432#18409
35K → 23M18325+158#18409#18251
23M → 24M8370+13#18251#18238
24M → 40K12317+106#18238#18132
40K → 25.2M598+51#18132#18081
25.2M → Finish11727+90#18081#17991
TOTALS18662800-934
📊

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