Boston Marathon logo
BOSTON MARATHON 2023

Mike Guarascio

Bib: 4292•M

NH

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 5%
Gender (Male)
#0 / 15176
Top 8%
Division (M18-39)
#0 / 5285
Top 19%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:00
Rank: #4217
Start → 5K
21:00 | 6:46/mi
10K· 6.21 mi
41:17
Rank: #3477 (+740)
5K → 10K
20:17 | 6:32/mi
15K· 9.32 mi
1:01:27
Rank: #3137 (+340)
10K → 15K
20:10 | 6:29/mi
20K· 12.43 mi
1:21:22
Rank: #2706 (+431)
15K → 20K
19:55 | 6:25/mi
Half· 13.11 mi
1:25:42
Rank: #2665 (+41)
20K → Half
4:20 | 6:21/mi
25K· 15.53 mi
1:41:11
Rank: #2489 (+176)
Half → 25K
15:29 | 6:23/mi
30K· 18.64 mi
2:00:44
Rank: #2096 (+393)
25K → 30K
19:33 | 6:18/mi
20M
2:09:00
Rank: #1893 (+203)
30K → 20M
8:16 | 6:05/mi
21M
2:15:20
Rank: #1738 (+155)
20M → 21M
6:20 | 6:20/mi
35K· 21.75 mi
2:19:41
Rank: #1652 (+86)
21M → 35K
4:21 | 5:49/mi
23M
2:27:12
Rank: #1518 (+134)
35K → 23M
7:31 | 6:00/mi
24M
2:33:09
Rank: #1430 (+88)
23M → 24M
5:57 | 5:57/mi
40K· 24.85 mi
2:38:14
Rank: #1349 (+81)
24M → 40K
5:05 | 5:57/mi
25.2M
2:40:24
Rank: #1315 (+34)
40K → 25.2M
2:10 | 6:17/mi
Finish· 26.22 mi
2:46:18
Rank: #1241 (+74)
25.2M → Finish
5:54 | 5:47/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
Distance13.11 mi
Time1:25:42
Pace6:32 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:20:36
Pace6:09 /mi
📊Negative Split: 6.0% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:22:5321:006:4621:00
6:46
-
10K
6.21 mi10:43:1041:176:3920:17
6:32
-0:14
15K
9.32 mi11:03:201:01:276:3620:10
6:29
-0:03
20K
12.43 mi11:23:151:21:226:3319:55
6:25
-0:04
Half
13.11 mi11:27:351:25:426:324:20
6:21
-0:04
25K
15.53 mi11:43:041:41:116:3115:29
6:23
+0:02
30K
18.64 mi12:02:372:00:446:2919:33
6:18
-0:05
20M
20.00 mi12:10:532:09:006:278:16
6:05
-0:13
21M
21.00 mi12:17:132:15:206:276:20
6:20
+0:15
35K
21.75 mi12:21:342:19:416:254:21
5:49
-0:31
23M
23.00 mi12:29:052:27:126:247:31
6:00
+0:11
24M
24.00 mi12:35:022:33:096:235:57
5:57
-0:03
40K
24.85 mi12:40:072:38:146:225:05
5:57
0:00
25.2M
25.20 mi12:42:172:40:246:222:10
6:17
+0:20
Finish
26.22 mi12:48:112:46:186:215:54
5:47
-0:30

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

5:47 /mi

Average Pace

6:21 /mi

Slowest Pace

6:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:09:27

42% of race

Time at Steady Pace

1:36:51

58% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:21 /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 mi10:22:5321:006:4621:00
6:46
#4217
10K
6.21 mi10:43:1041:176:3920:17
6:32
#3477
15K
9.32 mi11:03:201:01:276:3620:10
6:29
#3137
20K
12.43 mi11:23:151:21:226:3319:55
6:25
#2706
Half
13.11 mi11:27:351:25:426:324:20
6:21
#2665
25K
15.53 mi11:43:041:41:116:3115:29
6:23
#2489
30K
18.64 mi12:02:372:00:446:2919:33
6:18
#2096
20M
20.00 mi12:10:532:09:006:278:16
6:05
#1893
21M
21.00 mi12:17:132:15:206:276:20
6:20
#1738
35K
21.75 mi12:21:342:19:416:254:21
5:49
#1652
23M
23.00 mi12:29:052:27:126:247:31
6:00
#1518
24M
24.00 mi12:35:022:33:096:235:57
5:57
#1430
40K
24.85 mi12:40:072:38:146:225:05
5:57
#1349
25.2M
25.20 mi12:42:172:40:246:222:10
6:17
#1315
Finish
26.22 mi12:48:112:46:186:215:54
5:47
#1241
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi4217394639462568(Top 10%)2463(Top 16%)2463(Top 47%)
10K6.21 mi3.10 mi3477+7403282+6643282+6642949(Top 11%)2817(Top 19%)2817(Top 53%)
15K9.32 mi3.11 mi3137+3402987+2952987+2952568(Top 10%)2463(Top 16%)2463(Top 47%)
20K12.43 mi3.11 mi2706+4312585+4022585+4021828(Top 7%)1751(Top 12%)1751(Top 33%)
Half13.11 mi0.68 mi2665+412546+392546+391951(Top 7%)1874(Top 12%)1874(Top 35%)
25K15.53 mi2.42 mi2489+1762383+1632383+1631658(Top 6%)1588(Top 10%)1588(Top 30%)
30K18.64 mi3.11 mi2096+3932011+3722011+372900(Top 3%)857(Top 6%)857(Top 16%)
20M20.00 mi1.36 mi1893+2031811+2001811+200466(Top 2%)432(Top 3%)432(Top 8%)
21M21.00 mi1.00 mi1738+1551664+1471664+147393(Top 1%)364(Top 2%)364(Top 7%)
35K21.75 mi0.75 mi1652+861579+851579+85405(Top 2%)376(Top 2%)376(Top 7%)
23M23.00 mi1.25 mi1518+1341449+1301449+130310(Top 1%)285(Top 2%)285(Top 5%)
24M24.00 mi1.00 mi1430+881364+851364+85469(Top 2%)442(Top 3%)442(Top 8%)
40K24.85 mi0.85 mi1349+811286+781286+78284(Top 1%)261(Top 2%)261(Top 5%)
25.2M25.20 mi0.35 mi1315+341253+331253+33231(Top 0.9%)212(Top 1%)212(Top 4%)
Finish26.22 mi1.02 mi1241+741183+701183+70361(Top 1%)343(Top 2%)343(Top 6%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 10%
×21stories
+97ft-345ft

Overall

2568

Males

2463

M18-39

2463

5K→10K

3.1 - 6.2 mi

Top 11%
×5stories
+79ft-138ft

Overall

2949

Males

2817

M18-39

2817

10K→15K

6.2 - 9.3 mi

Top 10%
×3stories
+67ft-78ft

Overall

2568

Males

2463

M18-39

2463

15K→20K

9.3 - 12.4 mi

Top 7%
×5stories
+106ft-86ft

Overall

1828

Males

1751

M18-39

1751

20K→Half

12.4 - 13.1 mi

Top 7%
×2stories
+19ft-37ft

Overall

1951

Males

1874

M18-39

1874

Half→25K

13.1 - 15.5 mi

Top 6%
×4stories
+66ft-88ft

Overall

1658

Males

1588

M18-39

1588

25K→30K

15.5 - 18.6 mi

Top 3%
×9stories
+181ft-148ft

Overall

900

Males

857

M18-39

857

30K→20M

18.6 - 20.0 mi

Top 2%
×5stories
+64ft-50ft

Overall

466

Males

432

M18-39

432

20M→21M

20.0 - 21.0 mi

Top 1%
×8stories
+106ft-24ft

Overall

393

Males

364

M18-39

364

21M→35K

21.0 - 21.8 mi

Top 2%
×7stories
+17ft-86ft

Overall

405

Males

376

M18-39

376

35K→23M

21.8 - 23.0 mi

Top 1%
×5stories
+23ft-63ft

Overall

310

Males

285

M18-39

285

23M→24M

23.0 - 24.0 mi

Top 2%
×6stories
+12ft-82ft

Overall

469

Males

442

M18-39

442

24M→40K

24.0 - 24.9 mi

Top 1%
×1story
+6ft-20ft

Overall

284

Males

261

M18-39

261

40K→25.2M

24.9 - 25.2 mi

Top 0.9%
×1story
+13ft-16ft

Overall

231

Males

212

M18-39

212

25.2M→Finish

25.2 - 26.2 mi

Top 1%
×2stories
+22ft-21ft

Overall

361

Males

343

M18-39

343

Passing Analysis

Category:
Athletes Passed
3013
Passed By
37
Net Change
+2976
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4217
5K → 10K76121+740#4217#3477
10K → 15K3488+340#3477#3137
15K → 20K4310+431#3137#2706
20K → Half432+41#2706#2665
Half → 25K1815+176#2665#2489
25K → 30K3941+393#2489#2096
30K → 20M2030+203#2096#1893
20M → 21M1550+155#1893#1738
21M → 35K860+86#1738#1652
35K → 23M1340+134#1652#1518
23M → 24M880+88#1518#1430
24M → 40K810+81#1430#1349
40K → 25.2M340+34#1349#1315
25.2M → Finish740+74#1315#1241
TOTALS301337+2976
📊

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