Boston Marathon logo
BOSTON MARATHON 2023

Ernest Herrera

Bib: 8220•M

CA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 20%
Gender (Male)
#0 / 15176
Top 31%
Division (M18-39)
#0 / 5285
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:54
Rank: #3912
Start → 5K
20:54 | 6:44/mi
10K· 6.21 mi
42:12
Rank: #4897 (-985)
5K → 10K
21:18 | 6:51/mi
15K· 9.32 mi
1:03:33
Rank: #5158 (-261)
10K → 15K
21:21 | 6:52/mi
20K· 12.43 mi
1:25:37
Rank: #5630 (-472)
15K → 20K
22:04 | 7:06/mi
Half· 13.11 mi
1:30:07
Rank: #5537 (+93)
20K → Half
4:30 | 6:36/mi
25K· 15.53 mi
1:46:49
Rank: #5419 (+118)
Half → 25K
16:42 | 6:53/mi
30K· 18.64 mi
2:09:29
Rank: #5504 (-85)
25K → 30K
22:40 | 7:18/mi
20M
2:19:21
Rank: #5467 (+37)
30K → 20M
9:52 | 7:16/mi
21M
2:27:18
Rank: #5508 (-41)
20M → 21M
7:57 | 7:57/mi
35K· 21.75 mi
2:32:40
Rank: #5501 (+7)
21M → 35K
5:22 | 7:10/mi
23M
2:41:53
Rank: #5456 (+45)
35K → 23M
9:13 | 7:22/mi
24M
2:48:58
Rank: #5388 (+68)
23M → 24M
7:05 | 7:05/mi
40K· 24.85 mi
2:55:09
Rank: #5316 (+72)
24M → 40K
6:11 | 7:14/mi
25.2M
2:57:42
Rank: #5272 (+44)
40K → 25.2M
2:33 | 7:24/mi
Finish· 26.22 mi
3:04:49
Rank: #5213 (+59)
25.2M → Finish
7:07 | 6:59/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
Time1:30:07
Pace6:52 /mi
2nd Half
Distance13.11 mi
Time1:34:42
Pace7:13 /mi
📊Positive Split: 5.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:46:0120:546:4420:54
6:44
-
10K
6.21 mi11:07:1942:126:4721:18
6:51
+0:07
15K
9.32 mi11:28:401:03:336:4921:21
6:52
+0:01
20K
12.43 mi11:50:441:25:376:5322:04
7:06
+0:14
Half
13.11 mi11:55:141:30:076:524:30
6:36
-0:30
25K
15.53 mi12:11:561:46:496:5316:42
6:53
+0:17
30K
18.64 mi12:34:362:09:296:5722:40
7:18
+0:25
20M
20.00 mi12:44:282:19:216:589:52
7:16
-0:02
21M
21.00 mi12:52:252:27:187:017:57
7:57
+0:41
35K
21.75 mi12:57:472:32:407:015:22
7:10
-0:47
23M
23.00 mi13:07:002:41:537:029:13
7:22
+0:12
24M
24.00 mi13:14:052:48:587:027:05
7:05
-0:17
40K
24.85 mi13:20:162:55:097:036:11
7:14
+0:09
25.2M
25.20 mi13:22:492:57:427:032:33
7:24
+0:10
Finish
26.22 mi13:29:563:04:497:037:07
6:59
-0:25

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

6:36 /mi

Average Pace

7:03 /mi

Slowest Pace

7:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:24:45

46% of race

Time at Steady Pace

47:49

26% of race

Time at Slower Pace

52:15

28% of race

Average Pace: 7:03 /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 mi10:46:0120:546:4420:54
6:44
#3912
10K
6.21 mi11:07:1942:126:4721:18
6:51
#4897
15K
9.32 mi11:28:401:03:336:4921:21
6:52
#5158
20K
12.43 mi11:50:441:25:376:5322:04
7:06
#5630
Half
13.11 mi11:55:141:30:076:524:30
6:36
#5537
25K
15.53 mi12:11:561:46:496:5316:42
6:53
#5419
30K
18.64 mi12:34:362:09:296:5722:40
7:18
#5504
20M
20.00 mi12:44:282:19:216:589:52
7:16
#5467
21M
21.00 mi12:52:252:27:187:017:57
7:57
#5508
35K
21.75 mi12:57:472:32:407:015:22
7:10
#5501
23M
23.00 mi13:07:002:41:537:029:13
7:22
#5456
24M
24.00 mi13:14:052:48:587:027:05
7:05
#5388
40K
24.85 mi13:20:162:55:097:036:11
7:14
#5316
25.2M
25.20 mi13:22:492:57:427:032:33
7:24
#5272
Finish
26.22 mi13:29:563:04:497:037:07
6:59
#5213
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi3912367336735746(Top 22%)5264(Top 35%)5264(Top 100%)
10K6.21 mi3.10 mi4897-9854548-8754548-8755797(Top 22%)5298(Top 35%)5298(Top 100%)
15K9.32 mi3.11 mi5158-2614783-2354783-2355746(Top 22%)5264(Top 35%)5264(Top 100%)
20K12.43 mi3.11 mi5630-4725187-4045187-4046559(Top 25%)5881(Top 39%)5881(Top 111%)
Half13.11 mi0.68 mi5537+935111+765111+763453(Top 13%)3284(Top 22%)3284(Top 62%)
25K15.53 mi2.42 mi5419+1185005+1065005+1064873(Top 18%)4512(Top 30%)4512(Top 85%)
30K18.64 mi3.11 mi5504-855068-635068-635986(Top 22%)5352(Top 35%)5352(Top 101%)
20M20.00 mi1.36 mi5467+375028+405028+405418(Top 20%)4857(Top 32%)4857(Top 92%)
21M21.00 mi1.00 mi5508-415058-305058-306995(Top 26%)5851(Top 39%)5851(Top 111%)
35K21.75 mi0.75 mi5501+75049+95049+96304(Top 24%)5432(Top 36%)5432(Top 103%)
23M23.00 mi1.25 mi5456+454998+514998+515618(Top 21%)4920(Top 32%)4920(Top 93%)
24M24.00 mi1.00 mi5388+684934+644934+645093(Top 19%)4493(Top 30%)4493(Top 85%)
40K24.85 mi0.85 mi5316+724863+714863+715047(Top 19%)4377(Top 29%)4377(Top 83%)
25.2M25.20 mi0.35 mi5272+444821+424821+423431(Top 13%)3114(Top 21%)3114(Top 59%)
Finish26.22 mi1.02 mi5213+594769+524769+525097(Top 19%)4332(Top 29%)4332(Top 82%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 22%
×21stories
+97ft-345ft

Overall

5746

Males

5264

M18-39

5264

5K→10K

3.1 - 6.2 mi

Top 22%
×5stories
+79ft-138ft

Overall

5797

Males

5298

M18-39

5298

10K→15K

6.2 - 9.3 mi

Top 22%
×3stories
+67ft-78ft

Overall

5746

Males

5264

M18-39

5264

15K→20K

9.3 - 12.4 mi

Top 25%
×5stories
+106ft-86ft

Overall

6559

Males

5881

M18-39

5881

20K→Half

12.4 - 13.1 mi

Top 13%
×2stories
+19ft-37ft

Overall

3453

Males

3284

M18-39

3284

Half→25K

13.1 - 15.5 mi

Top 18%
×4stories
+66ft-88ft

Overall

4873

Males

4512

M18-39

4512

25K→30K

15.5 - 18.6 mi

Top 22%
×9stories
+181ft-148ft

Overall

5986

Males

5352

M18-39

5352

30K→20M

18.6 - 20.0 mi

Top 20%
×5stories
+64ft-50ft

Overall

5418

Males

4857

M18-39

4857

20M→21M

20.0 - 21.0 mi

Top 26%
×8stories
+106ft-24ft

Overall

6995

Males

5851

M18-39

5851

21M→35K

21.0 - 21.8 mi

Top 24%
×7stories
+17ft-86ft

Overall

6304

Males

5432

M18-39

5432

35K→23M

21.8 - 23.0 mi

Top 21%
×5stories
+23ft-63ft

Overall

5618

Males

4920

M18-39

4920

23M→24M

23.0 - 24.0 mi

Top 19%
×6stories
+12ft-82ft

Overall

5093

Males

4493

M18-39

4493

24M→40K

24.0 - 24.9 mi

Top 19%
×1story
+6ft-20ft

Overall

5047

Males

4377

M18-39

4377

40K→25.2M

24.9 - 25.2 mi

Top 13%
×1story
+13ft-16ft

Overall

3431

Males

3114

M18-39

3114

25.2M→Finish

25.2 - 26.2 mi

Top 19%
×2stories
+22ft-21ft

Overall

5097

Males

4332

M18-39

4332

Passing Analysis

Category:
Athletes Passed
959
Passed By
2260
Net Change
-1301
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3912
5K → 10K171002-985#3912#4897
10K → 15K41302-261#4897#5158
15K → 20K27499-472#5158#5630
20K → Half963+93#5630#5537
Half → 25K14123+118#5537#5419
25K → 30K96181-85#5419#5504
30K → 20M7336+37#5504#5467
20M → 21M3879-41#5467#5508
21M → 35K3932+7#5508#5501
35K → 23M8742+45#5501#5456
23M → 24M8820+68#5456#5388
24M → 40K8715+72#5388#5316
40K → 25.2M462+44#5316#5272
25.2M → Finish8324+59#5272#5213
TOTALS9592260-1301
📊

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