Boston Marathon logo
BOSTON MARATHON 2025

Luis Alarcon

Bib: 322•M

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Top 0.6%
Gender (Male)
#0 / 16105
Top 0.9%
Division (M18-39)
#0 / 5642
Top 2%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
16:45
Rank: #114
Start → 5K
16:45 | 5:23/mi
10K· 6.21 mi
33:32
Rank: #127 (-13)
5K → 10K
16:47 | 5:24/mi
15K· 9.32 mi
50:28
Rank: #119 (+8)
10K → 15K
16:56 | 5:27/mi
20K· 12.43 mi
1:07:27
Rank: #116 (+3)
15K → 20K
16:59 | 5:28/mi
Half· 13.11 mi
1:11:08
Rank: #116
20K → Half
3:41 | 5:24/mi
25K· 15.53 mi
1:24:27
Rank: #114 (+2)
Half → 25K
13:19 | 5:30/mi
30K· 18.64 mi
1:42:09
Rank: #121 (-7)
25K → 30K
17:42 | 5:42/mi
20M
1:50:02
Rank: #122 (-1)
30K → 20M
7:53 | 5:48/mi
21M
1:56:25
Rank: #127 (-5)
20M → 21M
6:23 | 6:23/mi
35K· 21.75 mi
2:00:43
Rank: #129 (-2)
21M → 35K
4:18 | 5:45/mi
23M
2:08:20
Rank: #135 (-6)
35K → 23M
7:37 | 6:05/mi
24M
2:14:21
Rank: #147 (-12)
23M → 24M
6:01 | 6:01/mi
40K· 24.85 mi
2:19:45
Rank: #150 (-3)
24M → 40K
5:24 | 6:19/mi
25.2M
2:22:11
Rank: #152 (-2)
40K → 25.2M
2:26 | 7:03/mi
Finish· 26.22 mi
2:28:35
Rank: #161 (-9)
25.2M → Finish
6:24 | 6:17/mi

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
Time1:11:08
Pace5:26 /mi
2nd Half
Distance13.11 mi
Time1:17:27
Pace5:54 /mi
📊Positive Split: 8.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:16:4916:455:2316:45
5:23
-
10K
6.21 mi10:33:3633:325:2416:47
5:24
+0:01
15K
9.32 mi10:50:3250:285:2516:56
5:27
+0:03
20K
12.43 mi11:07:311:07:275:2616:59
5:28
+0:01
Half
13.11 mi11:11:121:11:085:263:41
5:24
-0:04
25K
15.53 mi11:24:311:24:275:2613:19
5:30
+0:06
30K
18.64 mi11:42:131:42:095:2917:42
5:42
+0:12
20M
20.00 mi11:50:061:50:025:307:53
5:48
+0:06
21M
21.00 mi11:56:291:56:255:336:23
6:23
+0:35
35K
21.75 mi12:00:472:00:435:334:18
5:45
-0:38
23M
23.00 mi12:08:242:08:205:357:37
6:05
+0:20
24M
24.00 mi12:14:252:14:215:366:01
6:01
-0:04
40K
24.85 mi12:19:492:19:455:375:24
6:19
+0:18
25.2M
25.20 mi12:22:152:22:115:392:26
7:03
+0:44
Finish
26.22 mi12:28:392:28:355:406:24
6:17
-0:46

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

5:23 /mi

Average Pace

5:40 /mi

Slowest Pace

7:03 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:24:27

57% of race

Time at Steady Pace

29:53

20% of race

Time at Slower Pace

34:15

23% of race

Average Pace: 5:40 /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 mi10:16:4916:455:2316:45
5:23
#114
10K
6.21 mi10:33:3633:325:2416:47
5:24
#127
15K
9.32 mi10:50:3250:285:2516:56
5:27
#119
20K
12.43 mi11:07:311:07:275:2616:59
5:28
#116
Half
13.11 mi11:11:121:11:085:263:41
5:24
#116
25K
15.53 mi11:24:311:24:275:2613:19
5:30
#114
30K
18.64 mi11:42:131:42:095:2917:42
5:42
#121
20M
20.00 mi11:50:061:50:025:307:53
5:48
#122
21M
21.00 mi11:56:291:56:255:336:23
6:23
#127
35K
21.75 mi12:00:472:00:435:334:18
5:45
#129
23M
23.00 mi12:08:242:08:205:357:37
6:05
#135
24M
24.00 mi12:14:252:14:215:366:01
6:01
#147
40K
24.85 mi12:19:492:19:455:375:24
6:19
#150
25.2M
25.20 mi12:22:152:22:115:392:26
7:03
#152
Finish
26.22 mi12:28:392:28:355:406:24
6:17
#161
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi114113113125(Top 0.4%)105(Top 0.7%)105(Top 2%)
10K6.21 mi3.10 mi127-13106+7106+7132(Top 0.5%)110(Top 0.7%)110(Top 2%)
15K9.32 mi3.11 mi119+898+898+8125(Top 0.4%)105(Top 0.7%)105(Top 2%)
20K12.43 mi3.11 mi116+396+296+2112(Top 0.4%)94(Top 0.6%)94(Top 2%)
Half13.11 mi0.68 mi1169696112(Top 0.4%)111(Top 0.7%)111(Top 2%)
25K15.53 mi2.42 mi114+295+195+1125(Top 0.4%)108(Top 0.7%)108(Top 2%)
30K18.64 mi3.11 mi121-7102-7102-7169(Top 0.6%)147(Top 0.9%)147(Top 3%)
20M20.00 mi1.36 mi122-1104-2104-2185(Top 0.7%)168(Top 1%)168(Top 3%)
21M21.00 mi1.00 mi127-5108-4108-4474(Top 2%)445(Top 3%)445(Top 8%)
35K21.75 mi0.75 mi129-2110-2110-2309(Top 1%)287(Top 2%)287(Top 5%)
23M23.00 mi1.25 mi135-6115-5115-5443(Top 2%)416(Top 3%)416(Top 7%)
24M24.00 mi1.00 mi147-12126-11126-11600(Top 2%)560(Top 3%)560(Top 10%)
40K24.85 mi0.85 mi150-3129-3129-3978(Top 3%)915(Top 6%)915(Top 16%)
25.2M25.20 mi0.35 mi152-2131-2131-21573(Top 6%)1430(Top 9%)1430(Top 25%)
Finish26.22 mi1.02 mi161-9140-9140-91785(Top 6%)1648(Top 10%)1648(Top 29%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 0.4%
×21stories
+97ft-345ft

Overall

125

Males

105

M18-39

105

5K→10K

3.1 - 6.2 mi

Top 0.5%
×5stories
+79ft-138ft

Overall

132

Males

110

M18-39

110

10K→15K

6.2 - 9.3 mi

Top 0.4%
×3stories
+67ft-78ft

Overall

125

Males

105

M18-39

105

15K→20K

9.3 - 12.4 mi

Top 0.4%
×5stories
+106ft-86ft

Overall

112

Males

94

M18-39

94

20K→Half

12.4 - 13.1 mi

Top 0.4%
×2stories
+19ft-37ft

Overall

112

Males

111

M18-39

111

Half→25K

13.1 - 15.5 mi

Top 0.4%
×4stories
+66ft-88ft

Overall

125

Males

108

M18-39

108

25K→30K

15.5 - 18.6 mi

Top 0.6%
×9stories
+181ft-148ft

Overall

169

Males

147

M18-39

147

30K→20M

18.6 - 20.0 mi

Top 0.7%
×5stories
+64ft-50ft

Overall

185

Males

168

M18-39

168

20M→21M

20.0 - 21.0 mi

Top 2%
×8stories
+106ft-24ft

Overall

474

Males

445

M18-39

445

21M→35K

21.0 - 21.8 mi

Top 1%
×7stories
+17ft-86ft

Overall

309

Males

287

M18-39

287

35K→23M

21.8 - 23.0 mi

Top 2%
×5stories
+23ft-63ft

Overall

443

Males

416

M18-39

416

23M→24M

23.0 - 24.0 mi

Top 2%
×6stories
+12ft-82ft

Overall

600

Males

560

M18-39

560

24M→40K

24.0 - 24.9 mi

Top 3%
×1story
+6ft-20ft

Overall

978

Males

915

M18-39

915

40K→25.2M

24.9 - 25.2 mi

Top 6%
×1story
+13ft-16ft

Overall

1573

Males

1430

M18-39

1430

25.2M→Finish

25.2 - 26.2 mi

Top 6%
×2stories
+22ft-21ft

Overall

1785

Males

1648

M18-39

1648

Passing Analysis

Category:
Athletes Passed
41
Passed By
88
Net Change
-47
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#114
5K → 10K1326-13#114#127
10K → 15K91+8#127#119
15K → 20K63+3#119#116
20K → Half000#116#116
Half → 25K31+2#116#114
25K → 30K29-7#114#121
30K → 20M34-1#121#122
20M → 21M16-5#122#127
21M → 35K02-2#127#129
35K → 23M28-6#129#135
23M → 24M012-12#135#147
24M → 40K14-3#147#150
40K → 25.2M02-2#150#152
25.2M → Finish110-9#152#161
TOTALS4188-47
📊

Passing Visuals

Category:

📈Position Graph

Loading...

🎨Heatmap Timeline

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