Boston Marathon logo
BOSTON MARATHON 2023

Steven Decarlo

Bib: 3645•M

DE

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 7%
Gender (Male)
#0 / 15176
Top 13%
Division (M18-39)
#0 / 5285
Top 29%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:18
Rank: #2450
Start → 5K
20:18 | 6:32/mi
10K· 6.21 mi
39:34
Rank: #1838 (+612)
5K → 10K
19:16 | 6:12/mi
15K· 9.32 mi
58:51
Rank: #1651 (+187)
10K → 15K
19:17 | 6:12/mi
20K· 12.43 mi
1:18:16
Rank: #1523 (+128)
15K → 20K
19:25 | 6:15/mi
Half· 13.11 mi
1:22:27
Rank: #1480 (+43)
20K → Half
4:11 | 6:08/mi
25K· 15.53 mi
1:38:31
Rank: #1668 (-188)
Half → 25K
16:04 | 6:38/mi
30K· 18.64 mi
1:58:20
Rank: #1534 (+134)
25K → 30K
19:49 | 6:23/mi
20M
2:07:14
Rank: #1527 (+7)
30K → 20M
8:54 | 6:33/mi
21M
2:14:01
Rank: #1505 (+22)
20M → 21M
6:47 | 6:47/mi
35K· 21.75 mi
2:18:58
Rank: #1533 (-28)
21M → 35K
4:57 | 6:37/mi
23M
2:30:19
Rank: #2111 (-578)
35K → 23M
11:21 | 9:04/mi
24M
2:36:22
Rank: #2003 (+108)
23M → 24M
6:03 | 6:03/mi
40K· 24.85 mi
2:41:49
Rank: #1939 (+64)
24M → 40K
5:27 | 6:22/mi
25.2M
2:44:29
Rank: #1967 (-28)
40K → 25.2M
2:40 | 7:44/mi
Finish· 26.22 mi
2:51:22
Rank: #1992 (-25)
25.2M → Finish
6:53 | 6:45/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
Time1:22:27
Pace6:17 /mi
2nd Half
Distance13.11 mi
Time1:28:55
Pace6:47 /mi
📊Positive Split: 7.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:21:3820:186:3220:18
6:32
-
10K
6.21 mi10:40:5439:346:2219:16
6:12
-0:20
15K
9.32 mi11:00:1158:516:1919:17
6:12
0:00
20K
12.43 mi11:19:361:18:166:1819:25
6:15
+0:03
Half
13.11 mi11:23:471:22:276:174:11
6:08
-0:07
25K
15.53 mi11:39:511:38:316:2116:04
6:38
+0:30
30K
18.64 mi11:59:401:58:206:2119:49
6:23
-0:15
20M
20.00 mi12:08:342:07:146:228:54
6:33
+0:10
21M
21.00 mi12:15:212:14:016:236:47
6:47
+0:14
35K
21.75 mi12:20:182:18:586:234:57
6:37
-0:10
23M
23.00 mi12:31:392:30:196:3211:21
9:04
+2:27
24M
24.00 mi12:37:422:36:226:316:03
6:03
-3:01
40K
24.85 mi12:43:092:41:496:315:27
6:22
+0:19
25.2M
25.20 mi12:45:492:44:296:322:40
7:44
+1:22
Finish
26.22 mi12:52:422:51:226:326:53
6:45
-0:59

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

6:03 /mi

Average Pace

6:32 /mi

Slowest Pace

9:04 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

10:14

6% of race

Time at Steady Pace

2:27:07

86% of race

Time at Slower Pace

14:01

8% of race

Average Pace: 6:32 /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 mi10:21:3820:186:3220:18
6:32
#2450
10K
6.21 mi10:40:5439:346:2219:16
6:12
#1838
15K
9.32 mi11:00:1158:516:1919:17
6:12
#1651
20K
12.43 mi11:19:361:18:166:1819:25
6:15
#1523
Half
13.11 mi11:23:471:22:276:174:11
6:08
#1480
25K
15.53 mi11:39:511:38:316:2116:04
6:38
#1668
30K
18.64 mi11:59:401:58:206:2119:49
6:23
#1534
20M
20.00 mi12:08:342:07:146:228:54
6:33
#1527
21M
21.00 mi12:15:212:14:016:236:47
6:47
#1505
35K
21.75 mi12:20:182:18:586:234:57
6:37
#1533
23M
23.00 mi12:31:392:30:196:3211:21
9:04
#2111
24M
24.00 mi12:37:422:36:226:316:03
6:03
#2003
40K
24.85 mi12:43:092:41:496:315:27
6:22
#1939
25.2M
25.20 mi12:45:492:44:296:322:40
7:44
#1967
Finish
26.22 mi12:52:422:51:226:326:53
6:45
#1992
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2450233623361268(Top 5%)1208(Top 8%)1208(Top 23%)
10K6.21 mi3.10 mi1838+6121758+5781758+5781368(Top 5%)1304(Top 9%)1304(Top 25%)
15K9.32 mi3.11 mi1651+1871578+1801578+1801268(Top 5%)1208(Top 8%)1208(Top 23%)
20K12.43 mi3.11 mi1523+1281454+1241454+1241219(Top 5%)1166(Top 8%)1166(Top 22%)
Half13.11 mi0.68 mi1480+431413+411413+411144(Top 4%)1093(Top 7%)1093(Top 21%)
25K15.53 mi2.42 mi1668-1881596-1831596-1832842(Top 11%)2713(Top 18%)2713(Top 51%)
30K18.64 mi3.11 mi1534+1341466+1301466+1301155(Top 4%)1100(Top 7%)1100(Top 21%)
20M20.00 mi1.36 mi1527+71459+71459+71653(Top 6%)1577(Top 10%)1577(Top 30%)
21M21.00 mi1.00 mi1505+221438+211438+211365(Top 5%)1302(Top 9%)1302(Top 25%)
35K21.75 mi0.75 mi1533-281465-271465-273035(Top 11%)2837(Top 19%)2837(Top 54%)
23M23.00 mi1.25 mi2111-5782024-5592024-55916353(Top 61%)10381(Top 68%)10381(Top 196%)
24M24.00 mi1.00 mi2003+1081919+1051919+105664(Top 2%)629(Top 4%)629(Top 12%)
40K24.85 mi0.85 mi1939+641855+641855+641138(Top 4%)1077(Top 7%)1077(Top 20%)
25.2M25.20 mi0.35 mi1967-281883-281883-284927(Top 19%)4204(Top 28%)4204(Top 80%)
Finish26.22 mi1.02 mi1992-251908-251908-253786(Top 14%)3358(Top 22%)3358(Top 64%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 5%
×21stories
+97ft-345ft

Overall

1268

Males

1208

M18-39

1208

5K→10K

3.1 - 6.2 mi

Top 5%
×5stories
+79ft-138ft

Overall

1368

Males

1304

M18-39

1304

10K→15K

6.2 - 9.3 mi

Top 5%
×3stories
+67ft-78ft

Overall

1268

Males

1208

M18-39

1208

15K→20K

9.3 - 12.4 mi

Top 5%
×5stories
+106ft-86ft

Overall

1219

Males

1166

M18-39

1166

20K→Half

12.4 - 13.1 mi

Top 4%
×2stories
+19ft-37ft

Overall

1144

Males

1093

M18-39

1093

Half→25K

13.1 - 15.5 mi

Top 11%
×4stories
+66ft-88ft

Overall

2842

Males

2713

M18-39

2713

25K→30K

15.5 - 18.6 mi

Top 4%
×9stories
+181ft-148ft

Overall

1155

Males

1100

M18-39

1100

30K→20M

18.6 - 20.0 mi

Top 6%
×5stories
+64ft-50ft

Overall

1653

Males

1577

M18-39

1577

20M→21M

20.0 - 21.0 mi

Top 5%
×8stories
+106ft-24ft

Overall

1365

Males

1302

M18-39

1302

21M→35K

21.0 - 21.8 mi

Top 11%
×7stories
+17ft-86ft

Overall

3035

Males

2837

M18-39

2837

35K→23M

21.8 - 23.0 mi

Top 61%
×5stories
+23ft-63ft

Overall

16353

Males

10381

M18-39

10381

23M→24M

23.0 - 24.0 mi

Top 2%
×6stories
+12ft-82ft

Overall

664

Males

629

M18-39

629

24M→40K

24.0 - 24.9 mi

Top 4%
×1story
+6ft-20ft

Overall

1138

Males

1077

M18-39

1077

40K→25.2M

24.9 - 25.2 mi

Top 19%
×1story
+13ft-16ft

Overall

4927

Males

4204

M18-39

4204

25.2M→Finish

25.2 - 26.2 mi

Top 14%
×2stories
+22ft-21ft

Overall

3786

Males

3358

M18-39

3358

Passing Analysis

Category:
Athletes Passed
1404
Passed By
946
Net Change
+458
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2450
5K → 10K6131+612#2450#1838
10K → 15K1903+187#1838#1651
15K → 20K1335+128#1651#1523
20K → Half430+43#1523#1480
Half → 25K8196-188#1480#1668
25K → 30K1406+134#1668#1534
30K → 20M3023+7#1534#1527
20M → 21M3513+22#1527#1505
21M → 35K432-28#1505#1533
35K → 23M2580-578#1533#2111
23M → 24M1080+108#2111#2003
24M → 40K684+64#2003#1939
40K → 25.2M533-28#1939#1967
25.2M → Finish2550-25#1967#1992
TOTALS1404946+458
📊

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