Boston Marathon logo
BOSTON MARATHON 2025

Sam Shaylor

Bib: 2046•M

TN

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Top 18%
Gender (Male)
#0 / 16105
Top 29%
Division (M18-39)
#0 / 5642
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:22
Rank: #2055
Start → 5K
19:22 | 6:14/mi
10K· 6.21 mi
38:21
Rank: #1737 (+318)
5K → 10K
18:59 | 6:07/mi
15K· 9.32 mi
57:21
Rank: #1622 (+115)
10K → 15K
19:00 | 6:07/mi
20K· 12.43 mi
1:16:16
Rank: #1481 (+141)
15K → 20K
18:55 | 6:05/mi
Half· 13.11 mi
1:20:20
Rank: #1449 (+32)
20K → Half
4:04 | 5:58/mi
25K· 15.53 mi
1:35:22
Rank: #1429 (+20)
Half → 25K
15:02 | 6:12/mi
30K· 18.64 mi
1:57:26
Rank: #1945 (-516)
25K → 30K
22:04 | 7:06/mi
20M
2:07:11
Rank: #2121 (-176)
30K → 20M
9:45 | 7:10/mi
21M
2:15:14
Rank: #2333 (-212)
20M → 21M
8:03 | 8:03/mi
35K· 21.75 mi
2:23:41
Rank: #3235 (-902)
21M → 35K
8:27 | 11:18/mi
23M
2:33:15
Rank: #3427 (-192)
35K → 23M
9:34 | 7:38/mi
24M
2:41:32
Rank: #3820 (-393)
23M → 24M
8:17 | 8:17/mi
40K· 24.85 mi
2:48:51
Rank: #4172 (-352)
24M → 40K
7:19 | 8:33/mi
25.2M
2:54:58
Rank: #5166 (-994)
40K → 25.2M
6:07 | 17:44/mi
Finish· 26.22 mi
3:02:09
Rank: #5149 (+17)
25.2M → Finish
7:11 | 7:03/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
Time1:20:20
Pace6:08 /mi
2nd Half
Distance13.11 mi
Time1:41:49
Pace7:46 /mi
📊Positive Split: 26.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:21:2019:226:1419:22
6:14
-
10K
6.21 mi10:40:1938:216:1018:59
6:07
-0:07
15K
9.32 mi10:59:1957:216:0919:00
6:07
0:00
20K
12.43 mi11:18:141:16:166:0818:55
6:05
-0:02
Half
13.11 mi11:22:181:20:206:084:04
5:58
-0:07
25K
15.53 mi11:37:201:35:226:0815:02
6:12
+0:14
30K
18.64 mi11:59:241:57:266:1822:04
7:06
+0:54
20M
20.00 mi12:09:092:07:116:229:45
7:10
+0:04
21M
21.00 mi12:17:122:15:146:268:03
8:03
+0:53
35K
21.75 mi12:25:392:23:416:368:27
11:18
+3:15
23M
23.00 mi12:35:132:33:156:409:34
7:38
-3:40
24M
24.00 mi12:43:302:41:326:448:17
8:17
+0:39
40K
24.85 mi12:50:492:48:516:487:19
8:33
+0:16
25.2M
25.20 mi12:56:562:54:586:576:07
17:44
+9:11
Finish
26.22 mi13:04:073:02:096:577:11
7:03
-10:41

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

5:58 /mi

Average Pace

6:57 /mi

Slowest Pace

17:44 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

2:47:35

92% of race

Time at Slower Pace

14:34

8% of race

Average Pace: 6:57 /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 mi10:21:2019:226:1419:22
6:14
#2055
10K
6.21 mi10:40:1938:216:1018:59
6:07
#1737
15K
9.32 mi10:59:1957:216:0919:00
6:07
#1622
20K
12.43 mi11:18:141:16:166:0818:55
6:05
#1481
Half
13.11 mi11:22:181:20:206:084:04
5:58
#1449
25K
15.53 mi11:37:201:35:226:0815:02
6:12
#1429
30K
18.64 mi11:59:241:57:266:1822:04
7:06
#1945
20M
20.00 mi12:09:092:07:116:229:45
7:10
#2121
21M
21.00 mi12:17:122:15:146:268:03
8:03
#2333
35K
21.75 mi12:25:392:23:416:368:27
11:18
#3235
23M
23.00 mi12:35:132:33:156:409:34
7:38
#3427
24M
24.00 mi12:43:302:41:326:448:17
8:17
#3820
40K
24.85 mi12:50:492:48:516:487:19
8:33
#4172
25.2M
25.20 mi12:56:562:54:586:576:07
17:44
#5166
Finish
26.22 mi13:04:073:02:096:577:11
7:03
#5149
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2055195719571466(Top 5%)1395(Top 9%)1395(Top 25%)
10K6.21 mi3.10 mi1737+3181652+3051652+3051509(Top 5%)1432(Top 9%)1432(Top 25%)
15K9.32 mi3.11 mi1622+1151543+1091543+1091466(Top 5%)1395(Top 9%)1395(Top 25%)
20K12.43 mi3.11 mi1481+1411406+1371406+1371144(Top 4%)1080(Top 7%)1080(Top 19%)
Half13.11 mi0.68 mi1449+321375+311375+311046(Top 4%)993(Top 6%)993(Top 18%)
25K15.53 mi2.42 mi1429+201357+181357+181460(Top 5%)1388(Top 9%)1388(Top 25%)
30K18.64 mi3.11 mi1945-5161852-4951852-4955317(Top 19%)4792(Top 30%)4792(Top 85%)
20M20.00 mi1.36 mi2121-1762019-1672019-1675053(Top 18%)4520(Top 28%)4520(Top 80%)
21M21.00 mi1.00 mi2333-2122224-2052224-2057588(Top 27%)6006(Top 37%)6006(Top 106%)
35K21.75 mi0.75 mi3235-9023055-8313055-83124753(Top 87%)14230(Top 88%)14230(Top 252%)
23M23.00 mi1.25 mi3427-1923229-1743229-1747482(Top 26%)5851(Top 36%)5851(Top 104%)
24M24.00 mi1.00 mi3820-3933565-3363565-33613094(Top 46%)8678(Top 54%)8678(Top 154%)
40K24.85 mi0.85 mi4172-3523854-2893854-28913732(Top 48%)8857(Top 55%)8857(Top 157%)
25.2M25.20 mi0.35 mi5166-9944696-8424696-84228183(Top 99%)15942(Top 99%)15942(Top 283%)
Finish26.22 mi1.02 mi5149+174671+254671+256029(Top 21%)4737(Top 29%)4737(Top 84%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 5%
×21stories
+97ft-345ft

Overall

1466

Males

1395

M18-39

1395

5K→10K

3.1 - 6.2 mi

Top 5%
×5stories
+79ft-138ft

Overall

1509

Males

1432

M18-39

1432

10K→15K

6.2 - 9.3 mi

Top 5%
×3stories
+67ft-78ft

Overall

1466

Males

1395

M18-39

1395

15K→20K

9.3 - 12.4 mi

Top 4%
×5stories
+106ft-86ft

Overall

1144

Males

1080

M18-39

1080

20K→Half

12.4 - 13.1 mi

Top 4%
×2stories
+19ft-37ft

Overall

1046

Males

993

M18-39

993

Half→25K

13.1 - 15.5 mi

Top 5%
×4stories
+66ft-88ft

Overall

1460

Males

1388

M18-39

1388

25K→30K

15.5 - 18.6 mi

Top 19%
×9stories
+181ft-148ft

Overall

5317

Males

4792

M18-39

4792

30K→20M

18.6 - 20.0 mi

Top 18%
×5stories
+64ft-50ft

Overall

5053

Males

4520

M18-39

4520

20M→21M

20.0 - 21.0 mi

Top 27%
×8stories
+106ft-24ft

Overall

7588

Males

6006

M18-39

6006

21M→35K

21.0 - 21.8 mi

Top 87%
×7stories
+17ft-86ft

Overall

24753

Males

14230

M18-39

14230

35K→23M

21.8 - 23.0 mi

Top 26%
×5stories
+23ft-63ft

Overall

7482

Males

5851

M18-39

5851

23M→24M

23.0 - 24.0 mi

Top 46%
×6stories
+12ft-82ft

Overall

13094

Males

8678

M18-39

8678

24M→40K

24.0 - 24.9 mi

Top 48%
×1story
+6ft-20ft

Overall

13732

Males

8857

M18-39

8857

40K→25.2M

24.9 - 25.2 mi

Top 99%
×1story
+13ft-16ft

Overall

28183

Males

15942

M18-39

15942

25.2M→Finish

25.2 - 26.2 mi

Top 21%
×2stories
+22ft-21ft

Overall

6029

Males

4737

M18-39

4737

Passing Analysis

Category:
Athletes Passed
813
Passed By
3907
Net Change
-3094
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2055
5K → 10K33416+318#2055#1737
10K → 15K13318+115#1737#1622
15K → 20K1421+141#1622#1481
20K → Half320+32#1481#1449
Half → 25K5232+20#1449#1429
25K → 30K5521-516#1429#1945
30K → 20M4180-176#1945#2121
20M → 21M12224-212#2121#2333
21M → 35K1903-902#2333#3235
35K → 23M29221-192#3235#3427
23M → 24M7400-393#3427#3820
24M → 40K9361-352#3820#4172
40K → 25.2M0994-994#4172#5166
25.2M → Finish5336+17#5166#5149
TOTALS8133907-3094
📊

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