Boston Marathon logo
BOSTON MARATHON 2023

Chip Scarinzi

Bib: 1420•M

CA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 2%
Gender (Male)
#0 / 15176
Top 4%
Masters (Masters Men)
#0 / 9891
Top 0.9%
Division (M40-44)
#0 / 2241
Top 3%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:01
Rank: #940
Start → 5K
19:01 | 6:07/mi
10K· 6.21 mi
37:56
Rank: #980 (-40)
5K → 10K
18:55 | 6:05/mi
15K· 9.32 mi
56:53
Rank: #968 (+12)
10K → 15K
18:57 | 6:06/mi
20K· 12.43 mi
1:15:55
Rank: #932 (+36)
15K → 20K
19:02 | 6:08/mi
Half· 13.11 mi
1:20:02
Rank: #930 (+2)
20K → Half
4:07 | 6:02/mi
25K· 15.53 mi
1:34:49
Rank: #883 (+47)
Half → 25K
14:47 | 6:06/mi
30K· 18.64 mi
1:53:59
Rank: #803 (+80)
25K → 30K
19:10 | 6:10/mi
20M
2:02:24
Rank: #792 (+11)
30K → 20M
8:25 | 6:12/mi
21M
2:08:58
Rank: #783 (+9)
20M → 21M
6:34 | 6:34/mi
35K· 21.75 mi
2:13:17
Rank: #760 (+23)
21M → 35K
4:19 | 5:46/mi
23M
2:20:51
Rank: #719 (+41)
35K → 23M
7:34 | 6:03/mi
24M
2:26:49
Rank: #693 (+26)
23M → 24M
5:58 | 5:58/mi
40K· 24.85 mi
2:32:03
Rank: #675 (+18)
24M → 40K
5:14 | 6:07/mi
25.2M
2:34:19
Rank: #670 (+5)
40K → 25.2M
2:16 | 6:34/mi
Finish· 26.22 mi
2:40:31
Rank: #660 (+10)
25.2M → Finish
6:12 | 6:05/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 Half⚖️ Balanced
Distance13.11 mi
Time1:20:02
Pace6:06 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:20:29
Pace6:08 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:19:3319:016:0719:01
6:07
-
10K
6.21 mi10:38:2837:566:0618:55
6:05
-0:02
15K
9.32 mi10:57:2556:536:0618:57
6:06
+0:01
20K
12.43 mi11:16:271:15:556:0719:02
6:08
+0:02
Half
13.11 mi11:20:341:20:026:064:07
6:02
-0:06
25K
15.53 mi11:35:211:34:496:0614:47
6:06
+0:04
30K
18.64 mi11:54:311:53:596:0719:10
6:10
+0:04
20M
20.00 mi12:02:562:02:246:078:25
6:12
+0:02
21M
21.00 mi12:09:302:08:586:086:34
6:34
+0:22
35K
21.75 mi12:13:492:13:176:084:19
5:46
-0:48
23M
23.00 mi12:21:232:20:516:077:34
6:03
+0:17
24M
24.00 mi12:27:212:26:496:075:58
5:58
-0:05
40K
24.85 mi12:32:352:32:036:075:14
6:07
+0:09
25.2M
25.20 mi12:34:512:34:196:072:16
6:34
+0:27
Finish
26.22 mi12:41:032:40:316:086:12
6:05
-0:29

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

5:46 /mi

Average Pace

6:08 /mi

Slowest Pace

6:34 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:31:41

94% of race

Time at Steady Pace

8:50

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:07 /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 mi10:19:3319:016:0719:01
6:07
#940
10K
6.21 mi10:38:2837:566:0618:55
6:05
#980
15K
9.32 mi10:57:2556:536:0618:57
6:06
#968
20K
12.43 mi11:16:271:15:556:0719:02
6:08
#932
Half
13.11 mi11:20:341:20:026:064:07
6:02
#930
25K
15.53 mi11:35:211:34:496:0614:47
6:06
#883
30K
18.64 mi11:54:311:53:596:0719:10
6:10
#803
20M
20.00 mi12:02:562:02:246:078:25
6:12
#792
21M
21.00 mi12:09:302:08:586:086:34
6:34
#783
35K
21.75 mi12:13:492:13:176:084:19
5:46
#760
23M
23.00 mi12:21:232:20:516:077:34
6:03
#719
24M
24.00 mi12:27:212:26:496:075:58
5:58
#693
40K
24.85 mi12:32:352:32:036:075:14
6:07
#675
25.2M
25.20 mi12:34:512:34:196:072:16
6:34
#670
Finish
26.22 mi12:41:032:40:316:086:12
6:05
#660
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi940884884967(Top 4%)918(Top 6%)918(Top 41%)
10K6.21 mi3.10 mi980-40925-41925-411026(Top 4%)976(Top 6%)976(Top 44%)
15K9.32 mi3.11 mi968+12917+8917+8967(Top 4%)918(Top 6%)918(Top 41%)
20K12.43 mi3.11 mi932+36883+34883+34840(Top 3%)796(Top 5%)796(Top 36%)
Half13.11 mi0.68 mi930+2881+2881+2832(Top 3%)790(Top 5%)790(Top 35%)
25K15.53 mi2.42 mi883+47836+45836+45731(Top 3%)690(Top 5%)690(Top 31%)
30K18.64 mi3.11 mi803+80760+76760+76623(Top 2%)587(Top 4%)587(Top 26%)
20M20.00 mi1.36 mi792+11750+10750+10637(Top 2%)600(Top 4%)600(Top 27%)
21M21.00 mi1.00 mi783+9740+10740+10778(Top 3%)735(Top 5%)735(Top 33%)
35K21.75 mi0.75 mi760+23717+23717+23329(Top 1%)303(Top 2%)303(Top 14%)
23M23.00 mi1.25 mi719+41677+40677+40364(Top 1%)338(Top 2%)338(Top 15%)
24M24.00 mi1.00 mi693+26652+25652+25485(Top 2%)458(Top 3%)458(Top 20%)
40K24.85 mi0.85 mi675+18634+18634+18516(Top 2%)487(Top 3%)487(Top 22%)
25.2M25.20 mi0.35 mi670+5629+5629+5604(Top 2%)571(Top 4%)571(Top 25%)
Finish26.22 mi1.02 mi660+10619+10619+10929(Top 3%)887(Top 6%)887(Top 40%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 4%
×21stories
+97ft-345ft

Overall

967

Males

918

M40-44

918

5K→10K

3.1 - 6.2 mi

Top 4%
×5stories
+79ft-138ft

Overall

1026

Males

976

M40-44

976

10K→15K

6.2 - 9.3 mi

Top 4%
×3stories
+67ft-78ft

Overall

967

Males

918

M40-44

918

15K→20K

9.3 - 12.4 mi

Top 3%
×5stories
+106ft-86ft

Overall

840

Males

796

M40-44

796

20K→Half

12.4 - 13.1 mi

Top 3%
×2stories
+19ft-37ft

Overall

832

Males

790

M40-44

790

Half→25K

13.1 - 15.5 mi

Top 3%
×4stories
+66ft-88ft

Overall

731

Males

690

M40-44

690

25K→30K

15.5 - 18.6 mi

Top 2%
×9stories
+181ft-148ft

Overall

623

Males

587

M40-44

587

30K→20M

18.6 - 20.0 mi

Top 2%
×5stories
+64ft-50ft

Overall

637

Males

600

M40-44

600

20M→21M

20.0 - 21.0 mi

Top 3%
×8stories
+106ft-24ft

Overall

778

Males

735

M40-44

735

21M→35K

21.0 - 21.8 mi

Top 1%
×7stories
+17ft-86ft

Overall

329

Males

303

M40-44

303

35K→23M

21.8 - 23.0 mi

Top 1%
×5stories
+23ft-63ft

Overall

364

Males

338

M40-44

338

23M→24M

23.0 - 24.0 mi

Top 2%
×6stories
+12ft-82ft

Overall

485

Males

458

M40-44

458

24M→40K

24.0 - 24.9 mi

Top 2%
×1story
+6ft-20ft

Overall

516

Males

487

M40-44

487

40K→25.2M

24.9 - 25.2 mi

Top 2%
×1story
+13ft-16ft

Overall

604

Males

571

M40-44

571

25.2M→Finish

25.2 - 26.2 mi

Top 3%
×2stories
+22ft-21ft

Overall

929

Males

887

M40-44

887

Passing Analysis

Category:
Athletes Passed
424
Passed By
144
Net Change
+280
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#940
5K → 10K3373-40#940#980
10K → 15K3321+12#980#968
15K → 20K4711+36#968#932
20K → Half64+2#932#930
Half → 25K514+47#930#883
25K → 30K811+80#883#803
30K → 20M187+11#803#792
20M → 21M178+9#792#783
21M → 35K241+23#783#760
35K → 23M421+41#760#719
23M → 24M293+26#719#693
24M → 40K213+18#693#675
40K → 25.2M72+5#675#670
25.2M → Finish155+10#670#660
TOTALS424144+280
📊

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