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BOSTON MARATHON 2025

Alejandro Briceño Guzman

Bib: 31897•M

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

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
9:14/mi
28:40
↑ 97↓ 3451.5%
10K· 6.21 mi
8:58/mi
56:31
↑ 79↓ 1380.4%
15K· 9.32 mi
8:55/mi
1:24:14
↑ 67↓ 78
20K· 12.43 mi
9:02/mi
1:52:18
↑ 106↓ 860.1%
Half· 13.11 mi
8:37/mi
1:58:11
↑ 19↓ 370.5%
25K· 15.53 mi
9:03/mi
2:20:07
↑ 66↓ 880.2%
30K· 18.64 mi
9:21/mi
2:49:10
↑ 181↓ 1480.2%
20M
9:10/mi
3:01:37
↑ 64↓ 500.2%
21M
10:14/mi
3:11:51
↑ 106↓ 241.6%
35K· 21.75 mi
8:25/mi
3:18:09
↑ 17↓ 861.7%
23M
9:18/mi
3:29:48
↑ 23↓ 630.6%
24M
8:48/mi
3:38:36
↓ 821.3%
40K· 24.85 mi
9:21/mi
3:46:36
↓ 200.3%
25.2M
10:06/mi
3:50:05
↑ 13↓ 160.2%
Finish· 26.22 mi
8:51/mi
3:59:06
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:58:11
Pace9:01 /mi
2nd Half
Distance13.11 mi
Time2:00:55
Pace9:13 /mi
📊Positive Split: 2.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:51:4028:409:1428:40
9:14
-
10K
6.21 mi12:19:3156:319:0627:51
8:58
-0:16
15K
9.32 mi12:47:141:24:149:0227:43
8:55
-0:03
20K
12.43 mi13:15:181:52:189:0228:04
9:02
+0:07
Half
13.11 mi13:21:111:58:119:015:53
8:37
-0:25
25K
15.53 mi13:43:072:20:079:0121:56
9:03
+0:26
30K
18.64 mi14:12:102:49:109:0429:03
9:21
+0:18
20M
20.00 mi14:24:373:01:379:0512:27
9:10
-0:11
21M
21.00 mi14:34:513:11:519:0810:14
10:14
+1:04
35K
21.75 mi14:41:093:18:099:076:18
8:25
-1:49
23M
23.00 mi14:52:483:29:489:0711:39
9:18
+0:53
24M
24.00 mi15:01:363:38:369:078:48
8:48
-0:30
40K
24.85 mi15:09:363:46:369:078:00
9:21
+0:33
25.2M
25.20 mi15:13:053:50:059:083:29
10:06
+0:45
Finish
26.22 mi15:22:063:59:069:089:01
8:51
-1:15

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

8:25 /mi

Average Pace

9:08 /mi

Slowest Pace

10:14 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

20:59

9% of race

Time at Steady Pace

2:35:42

65% of race

Time at Slower Pace

1:02:25

26% of race

Average Pace: 9:07 /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 mi11:51:4028:409:1428:40
9:14
#23310
10K
6.21 mi12:19:3156:319:0627:51
8:58
#22786
15K
9.32 mi12:47:141:24:149:0227:43
8:55
#22430
20K
12.43 mi13:15:181:52:189:0228:04
9:02
#22084
Half
13.11 mi13:21:111:58:119:015:53
8:37
#21994
25K
15.53 mi13:43:072:20:079:0121:56
9:03
#21638
30K
18.64 mi14:12:102:49:109:0429:03
9:21
#21214
20M
20.00 mi14:24:373:01:379:0512:27
9:10
#20943
21M
21.00 mi14:34:513:11:519:0810:14
10:14
#20808
35K
21.75 mi14:41:093:18:099:076:18
8:25
#20614
23M
23.00 mi14:52:483:29:489:0711:39
9:18
#20471
24M
24.00 mi15:01:363:38:369:078:48
8:48
#20329
40K
24.85 mi15:09:363:46:369:078:00
9:21
#20255
25.2M
25.20 mi15:13:053:50:059:083:29
10:06
#20219
Finish
26.22 mi15:22:063:59:069:089:01
8:51
#20174
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi23310139091390921662(Top 76%)13245(Top 82%)13245(Top 235%)
10K6.21 mi3.10 mi22786+52413687+22213687+22222222(Top 78%)13438(Top 83%)13438(Top 238%)
15K9.32 mi3.11 mi22430+35613545+14213545+14221662(Top 76%)13245(Top 82%)13245(Top 235%)
20K12.43 mi3.11 mi22084+34613381+16413381+16421141(Top 74%)12952(Top 80%)12952(Top 230%)
Half13.11 mi0.68 mi21994+9013340+4113340+4119904(Top 70%)12431(Top 77%)12431(Top 220%)
25K15.53 mi2.42 mi21638+35613177+16313177+16320105(Top 71%)12463(Top 77%)12463(Top 221%)
30K18.64 mi3.11 mi21214+42412959+21812959+21819341(Top 68%)11983(Top 74%)11983(Top 212%)
20M20.00 mi1.36 mi20943+27112824+13512824+13517601(Top 62%)11088(Top 69%)11088(Top 197%)
21M21.00 mi1.00 mi20808+13512739+8512739+8519125(Top 67%)11681(Top 73%)11681(Top 207%)
35K21.75 mi0.75 mi20614+19412629+11012629+11014992(Top 53%)9741(Top 60%)9741(Top 173%)
23M23.00 mi1.25 mi20471+14312545+8412545+8417789(Top 63%)10867(Top 67%)10867(Top 193%)
24M24.00 mi1.00 mi20329+14212460+8512460+8516321(Top 57%)10179(Top 63%)10179(Top 180%)
40K24.85 mi0.85 mi20255+7412405+5512405+5518098(Top 64%)10887(Top 68%)10887(Top 193%)
25.2M25.20 mi0.35 mi20219+3612385+2012385+2017448(Top 61%)10588(Top 66%)10588(Top 188%)
Finish26.22 mi1.02 mi20174+4512351+3412351+3418276(Top 64%)11009(Top 68%)11009(Top 195%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 76%
×21story building
+97ft-345ft

Overall

21662

Males

13245

M18-39

13245

5K→10K

3.1 - 6.2 mi

Top 78%
×5story building
+79ft-138ft

Overall

22222

Males

13438

M18-39

13438

10K→15K

6.2 - 9.3 mi

Top 76%
×3story building
+67ft-78ft

Overall

21662

Males

13245

M18-39

13245

15K→20K

9.3 - 12.4 mi

Top 74%
×5story building
+106ft-86ft

Overall

21141

Males

12952

M18-39

12952

20K→Half

12.4 - 13.1 mi

Top 70%
×2story building
+19ft-37ft

Overall

19904

Males

12431

M18-39

12431

Half→25K

13.1 - 15.5 mi

Top 71%
×4story building
+66ft-88ft

Overall

20105

Males

12463

M18-39

12463

25K→30K

15.5 - 18.6 mi

Top 68%
×9story building
+181ft-148ft

Overall

19341

Males

11983

M18-39

11983

30K→20M

18.6 - 20.0 mi

Top 62%
×5story building
+64ft-50ft

Overall

17601

Males

11088

M18-39

11088

20M→21M

20.0 - 21.0 mi

Top 67%
×8story building
+106ft-24ft

Overall

19125

Males

11681

M18-39

11681

21M→35K

21.0 - 21.8 mi

Top 53%
×7story building
+17ft-86ft

Overall

14992

Males

9741

M18-39

9741

35K→23M

21.8 - 23.0 mi

Top 63%
×5story building
+23ft-63ft

Overall

17789

Males

10867

M18-39

10867

23M→24M

23.0 - 24.0 mi

Top 57%
×6story building
+12ft-82ft

Overall

16321

Males

10179

M18-39

10179

24M→40K

24.0 - 24.9 mi

Top 64%
×1story
+6ft-20ft

Overall

18098

Males

10887

M18-39

10887

40K→25.2M

24.9 - 25.2 mi

Top 61%
×1story
+13ft-16ft

Overall

17448

Males

10588

M18-39

10588

25.2M→Finish

25.2 - 26.2 mi

Top 64%
×2story building
+22ft-21ft

Overall

18276

Males

11009

M18-39

11009

Passing Analysis

Category:
Athletes Passed
3441
Passed By
305
Net Change
+3136
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23310
5K → 10K57652+524#23310#22786
10K → 15K40246+356#22786#22430
15K → 20K37933+346#22430#22084
20K → Half900+90#22084#21994
Half → 25K36711+356#21994#21638
25K → 30K45531+424#21638#21214
30K → 20M2776+271#21214#20943
20M → 21M16631+135#20943#20808
21M → 35K1951+194#20808#20614
35K → 23M16623+143#20614#20471
23M → 24M1453+142#20471#20329
24M → 40K9218+74#20329#20255
40K → 25.2M5014+36#20255#20219
25.2M → Finish8136+45#20219#20174
TOTALS3441305+3136
📊

Passing Visuals

Category:
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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