Boston Marathon logo
BOSTON MARATHON 2023

Javier Guerrero Velasquez

Bib: 12148•M

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 36%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Top 40%
Division (M45-49)
#0 / 2252
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:12
Rank: #9346
Start → 5K
23:12 | 7:28/mi
10K· 6.21 mi
46:37
Rank: #10038 (-692)
5K → 10K
23:25 | 7:32/mi
15K· 9.32 mi
1:10:05
Rank: #10228 (-190)
10K → 15K
23:28 | 7:33/mi
20K· 12.43 mi
1:33:20
Rank: #9916 (+312)
15K → 20K
23:15 | 7:29/mi
Half· 13.11 mi
1:38:24
Rank: #9895 (+21)
20K → Half
5:04 | 7:26/mi
25K· 15.53 mi
1:56:56
Rank: #9874 (+21)
Half → 25K
18:32 | 7:39/mi
30K· 18.64 mi
2:21:00
Rank: #9689 (+185)
25K → 30K
24:04 | 7:45/mi
20M
2:31:33
Rank: #9584 (+105)
30K → 20M
10:33 | 7:46/mi
21M
2:39:46
Rank: #9493 (+91)
20M → 21M
8:13 | 8:13/mi
35K· 21.75 mi
2:45:30
Rank: #9486 (+7)
21M → 35K
5:44 | 7:40/mi
23M
2:55:20
Rank: #9395 (+91)
35K → 23M
9:50 | 7:51/mi
24M
3:03:04
Rank: #9367 (+28)
23M → 24M
7:44 | 7:44/mi
40K· 24.85 mi
3:10:33
Rank: #9554 (-187)
24M → 40K
7:29 | 8:45/mi
25.2M
3:13:55
Rank: #9678 (-124)
40K → 25.2M
3:22 | 9:46/mi
Finish· 26.22 mi
3:21:46
Rank: #9657 (+21)
25.2M → Finish
7:51 | 7:42/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
Time1:38:24
Pace7:30 /mi
2nd Half
Distance13.11 mi
Time1:43:22
Pace7:53 /mi
📊Positive Split: 5.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:50:4523:127:2823:12
7:28
-
10K
6.21 mi11:14:1046:377:3023:25
7:32
+0:04
15K
9.32 mi11:37:381:10:057:3123:28
7:33
+0:01
20K
12.43 mi12:00:531:33:207:3123:15
7:29
-0:04
Half
13.11 mi12:05:571:38:247:305:04
7:26
-0:03
25K
15.53 mi12:24:291:56:567:3218:32
7:39
+0:13
30K
18.64 mi12:48:332:21:007:3424:04
7:45
+0:06
20M
20.00 mi12:59:062:31:337:3510:33
7:46
+0:01
21M
21.00 mi13:07:192:39:467:368:13
8:13
+0:27
35K
21.75 mi13:13:032:45:307:375:44
7:40
-0:33
23M
23.00 mi13:22:532:55:207:379:50
7:51
+0:11
24M
24.00 mi13:30:373:03:047:387:44
7:44
-0:07
40K
24.85 mi13:38:063:10:337:407:29
8:45
+1:01
25.2M
25.20 mi13:41:283:13:557:423:22
9:46
+1:01
Finish
26.22 mi13:49:193:21:467:427:51
7:42
-2:04

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

7:26 /mi

Average Pace

7:42 /mi

Slowest Pace

9:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

3:02:42

91% of race

Time at Slower Pace

19:04

9% of race

Average Pace: 7:42 /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 mi10:50:4523:127:2823:12
7:28
#9346
10K
6.21 mi11:14:1046:377:3023:25
7:32
#10038
15K
9.32 mi11:37:381:10:057:3123:28
7:33
#10228
20K
12.43 mi12:00:531:33:207:3123:15
7:29
#9916
Half
13.11 mi12:05:571:38:247:305:04
7:26
#9895
25K
15.53 mi12:24:291:56:567:3218:32
7:39
#9874
30K
18.64 mi12:48:332:21:007:3424:04
7:45
#9689
20M
20.00 mi12:59:062:31:337:3510:33
7:46
#9584
21M
21.00 mi13:07:192:39:467:368:13
8:13
#9493
35K
21.75 mi13:13:032:45:307:375:44
7:40
#9486
23M
23.00 mi13:22:532:55:207:379:50
7:51
#9395
24M
24.00 mi13:30:373:03:047:387:44
7:44
#9367
40K
24.85 mi13:38:063:10:337:407:29
8:45
#9554
25.2M
25.20 mi13:41:283:13:557:423:22
9:46
#9678
Finish
26.22 mi13:49:193:21:467:427:51
7:42
#9657
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi93467782778210584(Top 40%)8441(Top 56%)8441(Top 375%)
10K6.21 mi3.10 mi10038-6928168-3868168-38610757(Top 40%)8558(Top 56%)8558(Top 380%)
15K9.32 mi3.11 mi10228-1908289-1218289-12110584(Top 40%)8441(Top 56%)8441(Top 375%)
20K12.43 mi3.11 mi9916+3128101+1888101+1889181(Top 34%)7610(Top 50%)7610(Top 338%)
Half13.11 mi0.68 mi9895+218094+78094+79579(Top 36%)7860(Top 52%)7860(Top 349%)
25K15.53 mi2.42 mi9874+218065+298065+299862(Top 37%)7904(Top 52%)7904(Top 351%)
30K18.64 mi3.11 mi9689+1857920+1457920+1458973(Top 34%)7268(Top 48%)7268(Top 323%)
20M20.00 mi1.36 mi9584+1057828+927828+928581(Top 32%)6948(Top 46%)6948(Top 309%)
21M21.00 mi1.00 mi9493+917751+777751+778692(Top 33%)6897(Top 45%)6897(Top 306%)
35K21.75 mi0.75 mi9486+77731+207731+209671(Top 36%)7443(Top 49%)7443(Top 331%)
23M23.00 mi1.25 mi9395+917657+747657+748755(Top 33%)6836(Top 45%)6836(Top 304%)
24M24.00 mi1.00 mi9367+287609+487609+489281(Top 35%)7033(Top 46%)7033(Top 312%)
40K24.85 mi0.85 mi9554-1877695-867695-8614777(Top 56%)9576(Top 63%)9576(Top 425%)
25.2M25.20 mi0.35 mi9678-1247746-517746-5116305(Top 61%)10228(Top 67%)10228(Top 454%)
Finish26.22 mi1.02 mi9657+217702+447702+449987(Top 38%)7281(Top 48%)7281(Top 323%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 40%
×21stories
+97ft-345ft

Overall

10584

Males

8441

M45-49

8441

5K→10K

3.1 - 6.2 mi

Top 40%
×5stories
+79ft-138ft

Overall

10757

Males

8558

M45-49

8558

10K→15K

6.2 - 9.3 mi

Top 40%
×3stories
+67ft-78ft

Overall

10584

Males

8441

M45-49

8441

15K→20K

9.3 - 12.4 mi

Top 34%
×5stories
+106ft-86ft

Overall

9181

Males

7610

M45-49

7610

20K→Half

12.4 - 13.1 mi

Top 36%
×2stories
+19ft-37ft

Overall

9579

Males

7860

M45-49

7860

Half→25K

13.1 - 15.5 mi

Top 37%
×4stories
+66ft-88ft

Overall

9862

Males

7904

M45-49

7904

25K→30K

15.5 - 18.6 mi

Top 34%
×9stories
+181ft-148ft

Overall

8973

Males

7268

M45-49

7268

30K→20M

18.6 - 20.0 mi

Top 32%
×5stories
+64ft-50ft

Overall

8581

Males

6948

M45-49

6948

20M→21M

20.0 - 21.0 mi

Top 33%
×8stories
+106ft-24ft

Overall

8692

Males

6897

M45-49

6897

21M→35K

21.0 - 21.8 mi

Top 36%
×7stories
+17ft-86ft

Overall

9671

Males

7443

M45-49

7443

35K→23M

21.8 - 23.0 mi

Top 33%
×5stories
+23ft-63ft

Overall

8755

Males

6836

M45-49

6836

23M→24M

23.0 - 24.0 mi

Top 35%
×6stories
+12ft-82ft

Overall

9281

Males

7033

M45-49

7033

24M→40K

24.0 - 24.9 mi

Top 56%
×1story
+6ft-20ft

Overall

14777

Males

9576

M45-49

9576

40K→25.2M

24.9 - 25.2 mi

Top 61%
×1story
+13ft-16ft

Overall

16305

Males

10228

M45-49

10228

25.2M→Finish

25.2 - 26.2 mi

Top 38%
×2stories
+22ft-21ft

Overall

9987

Males

7281

M45-49

7281

Passing Analysis

Category:
Athletes Passed
1605*
Passed By
1913
Net Change
-311
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9346
5K → 10K85776-692#9346#10038
10K → 15K121310-190#10038#10228
15K → 20K347*35+312#10228#9916
20K → Half4221+21#9916#9895
Half → 25K12199+21#9895#9874
25K → 30K255*70+185#9874#9689
30K → 20M13429+105#9689#9584
20M → 21M12433+91#9584#9493
21M → 35K5649+7#9493#9486
35K → 23M12433+91#9486#9395
23M → 24M8254+28#9395#9367
24M → 40K19206-187#9367#9554
40K → 25.2M13137-124#9554#9678
25.2M → Finish82*61+21#9678#9657
TOTALS1605*1913-311

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

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