Boston Marathon logo
BOSTON MARATHON 2023

Eric Larson

Bib: 8681•M

AZ

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 18%
Gender (Male)
#0 / 15176
Top 30%
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
20:59
Rank: #4191
Start → 5K
20:59 | 6:45/mi
10K· 6.21 mi
42:05
Rank: #4724 (-533)
5K → 10K
21:06 | 6:47/mi
15K· 9.32 mi
1:02:55
Rank: #4512 (+212)
10K → 15K
20:50 | 6:42/mi
20K· 12.43 mi
1:24:05
Rank: #4512
15K → 20K
21:10 | 6:49/mi
Half· 13.11 mi
1:28:42
Rank: #4519 (-7)
20K → Half
4:37 | 6:46/mi
25K· 15.53 mi
1:45:36
Rank: #4677 (-158)
Half → 25K
16:54 | 6:58/mi
30K· 18.64 mi
2:07:53
Rank: #4841 (-164)
25K → 30K
22:17 | 7:10/mi
20M
2:17:36
Rank: #4821 (+20)
30K → 20M
9:43 | 7:09/mi
21M
2:25:18
Rank: #4871 (-50)
20M → 21M
7:42 | 7:42/mi
35K· 21.75 mi
2:30:41
Rank: #4928 (-57)
21M → 35K
5:23 | 7:12/mi
23M
2:39:50
Rank: #4913 (+15)
35K → 23M
9:09 | 7:18/mi
24M
2:47:05
Rank: #4931 (-18)
23M → 24M
7:15 | 7:15/mi
40K· 24.85 mi
2:53:20
Rank: #4920 (+11)
24M → 40K
6:15 | 7:19/mi
25.2M
2:56:01
Rank: #4915 (+5)
40K → 25.2M
2:41 | 7:47/mi
Finish· 26.22 mi
3:03:14
Rank: #4889 (+26)
25.2M → Finish
7:13 | 7:05/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
Time1:28:42
Pace6:46 /mi
2nd Half
Distance13.11 mi
Time1:34:32
Pace7:13 /mi
📊Positive Split: 6.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:46:1420:596:4520:59
6:45
-
10K
6.21 mi11:07:2042:056:4621:06
6:47
+0:02
15K
9.32 mi11:28:101:02:556:4520:50
6:42
-0:05
20K
12.43 mi11:49:201:24:056:4621:10
6:49
+0:07
Half
13.11 mi11:53:571:28:426:464:37
6:46
-0:03
25K
15.53 mi12:10:511:45:366:4816:54
6:58
+0:12
30K
18.64 mi12:33:082:07:536:5222:17
7:10
+0:12
20M
20.00 mi12:42:512:17:366:539:43
7:09
-0:01
21M
21.00 mi12:50:332:25:186:557:42
7:42
+0:33
35K
21.75 mi12:55:562:30:416:565:23
7:12
-0:30
23M
23.00 mi13:05:052:39:506:579:09
7:18
+0:06
24M
24.00 mi13:12:202:47:056:587:15
7:15
-0:03
40K
24.85 mi13:18:352:53:206:586:15
7:19
+0:04
25.2M
25.20 mi13:21:162:56:016:592:41
7:47
+0:28
Finish
26.22 mi13:28:293:03:147:007:13
7:05
-0:42

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

6:42 /mi

Average Pace

7:00 /mi

Slowest Pace

7:47 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:52:51

94% of race

Time at Steady Pace

10:23

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:59 /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 mi10:46:1420:596:4520:59
6:45
#4191
10K
6.21 mi11:07:2042:056:4621:06
6:47
#4724
15K
9.32 mi11:28:101:02:556:4520:50
6:42
#4512
20K
12.43 mi11:49:201:24:056:4621:10
6:49
#4512
Half
13.11 mi11:53:571:28:426:464:37
6:46
#4519
25K
15.53 mi12:10:511:45:366:4816:54
6:58
#4677
30K
18.64 mi12:33:082:07:536:5222:17
7:10
#4841
20M
20.00 mi12:42:512:17:366:539:43
7:09
#4821
21M
21.00 mi12:50:332:25:186:557:42
7:42
#4871
35K
21.75 mi12:55:562:30:416:565:23
7:12
#4928
23M
23.00 mi13:05:052:39:506:579:09
7:18
#4913
24M
24.00 mi13:12:202:47:056:587:15
7:15
#4931
40K
24.85 mi13:18:352:53:206:586:15
7:19
#4920
25.2M
25.20 mi13:21:162:56:016:592:41
7:47
#4915
Finish
26.22 mi13:28:293:03:147:007:13
7:05
#4889
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi4191392739274196(Top 16%)3938(Top 26%)3938(Top 75%)
10K6.21 mi3.10 mi4724-5334405-4784405-4785205(Top 20%)4814(Top 32%)4814(Top 91%)
15K9.32 mi3.11 mi4512+2124216+1894216+1894196(Top 16%)3938(Top 26%)3938(Top 75%)
20K12.43 mi3.11 mi45124214+24214+24554(Top 17%)4243(Top 28%)4243(Top 80%)
Half13.11 mi0.68 mi4519-74222-84222-84980(Top 19%)4612(Top 30%)4612(Top 87%)
25K15.53 mi2.42 mi4677-1584356-1344356-1345397(Top 20%)4972(Top 33%)4972(Top 94%)
30K18.64 mi3.11 mi4841-1644504-1484504-1485337(Top 20%)4867(Top 32%)4867(Top 92%)
20M20.00 mi1.36 mi4821+204483+214483+214863(Top 18%)4428(Top 29%)4428(Top 84%)
21M21.00 mi1.00 mi4871-504526-434526-435586(Top 21%)4887(Top 32%)4887(Top 92%)
35K21.75 mi0.75 mi4928-574567-414567-416443(Top 24%)5523(Top 36%)5523(Top 105%)
23M23.00 mi1.25 mi4913+154547+204547+205336(Top 20%)4711(Top 31%)4711(Top 89%)
24M24.00 mi1.00 mi4931-184551-44551-46007(Top 23%)5105(Top 34%)5105(Top 97%)
40K24.85 mi0.85 mi4920+114533+184533+185488(Top 21%)4675(Top 31%)4675(Top 88%)
25.2M25.20 mi0.35 mi4915+54528+54528+55244(Top 20%)4424(Top 29%)4424(Top 84%)
Finish26.22 mi1.02 mi4889+264504+244504+245689(Top 21%)4716(Top 31%)4716(Top 89%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 16%
×21stories
+97ft-345ft

Overall

4196

Males

3938

M18-39

3938

5K→10K

3.1 - 6.2 mi

Top 20%
×5stories
+79ft-138ft

Overall

5205

Males

4814

M18-39

4814

10K→15K

6.2 - 9.3 mi

Top 16%
×3stories
+67ft-78ft

Overall

4196

Males

3938

M18-39

3938

15K→20K

9.3 - 12.4 mi

Top 17%
×5stories
+106ft-86ft

Overall

4554

Males

4243

M18-39

4243

20K→Half

12.4 - 13.1 mi

Top 19%
×2stories
+19ft-37ft

Overall

4980

Males

4612

M18-39

4612

Half→25K

13.1 - 15.5 mi

Top 20%
×4stories
+66ft-88ft

Overall

5397

Males

4972

M18-39

4972

25K→30K

15.5 - 18.6 mi

Top 20%
×9stories
+181ft-148ft

Overall

5337

Males

4867

M18-39

4867

30K→20M

18.6 - 20.0 mi

Top 18%
×5stories
+64ft-50ft

Overall

4863

Males

4428

M18-39

4428

20M→21M

20.0 - 21.0 mi

Top 21%
×8stories
+106ft-24ft

Overall

5586

Males

4887

M18-39

4887

21M→35K

21.0 - 21.8 mi

Top 24%
×7stories
+17ft-86ft

Overall

6443

Males

5523

M18-39

5523

35K→23M

21.8 - 23.0 mi

Top 20%
×5stories
+23ft-63ft

Overall

5336

Males

4711

M18-39

4711

23M→24M

23.0 - 24.0 mi

Top 23%
×6stories
+12ft-82ft

Overall

6007

Males

5105

M18-39

5105

24M→40K

24.0 - 24.9 mi

Top 21%
×1story
+6ft-20ft

Overall

5488

Males

4675

M18-39

4675

40K→25.2M

24.9 - 25.2 mi

Top 20%
×1story
+13ft-16ft

Overall

5244

Males

4424

M18-39

4424

25.2M→Finish

25.2 - 26.2 mi

Top 21%
×2stories
+22ft-21ft

Overall

5689

Males

4716

M18-39

4716

Passing Analysis

Category:
Athletes Passed
968
Passed By
1666
Net Change
-698
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4191
5K → 10K58591-533#4191#4724
10K → 15K25543+212#4724#4512
15K → 20K1051050#4512#4512
20K → Half2330-7#4512#4519
Half → 25K59217-158#4519#4677
25K → 30K83247-164#4677#4841
30K → 20M7151+20#4841#4821
20M → 21M4191-50#4821#4871
21M → 35K2481-57#4871#4928
35K → 23M8267+15#4928#4913
23M → 24M4260-18#4913#4931
24M → 40K5039+11#4931#4920
40K → 25.2M1914+5#4920#4915
25.2M → Finish5630+26#4915#4889
TOTALS9681666-698
📊

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