Boston Marathon logo
BOSTON MARATHON 2025

Jason Scarbro

Bib: 12274•M

NB

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Top 35%
Gender (Male)
#0 / 16105
Top 48%
Masters (Masters Men)
#0 / 10463
Top 37%
Division (M50-54)
#0 / 1996
Top 38%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:02
Rank: #8554
Start → 5K
22:02 | 7:06/mi
10K· 6.21 mi
44:12
Rank: #8735 (-181)
5K → 10K
22:10 | 7:08/mi
15K· 9.32 mi
1:06:33
Rank: #8834 (-99)
10K → 15K
22:21 | 7:12/mi
20K· 12.43 mi
1:29:52
Rank: #9266 (-432)
15K → 20K
23:19 | 7:30/mi
Half· 13.11 mi
1:35:08
Rank: #9459 (-193)
20K → Half
5:16 | 7:43/mi
25K· 15.53 mi
1:54:07
Rank: #9963 (-504)
Half → 25K
18:59 | 7:50/mi
30K· 18.64 mi
2:19:15
Rank: #10308 (-345)
25K → 30K
25:08 | 8:05/mi
20M
2:30:17
Rank: #10368 (-60)
30K → 20M
11:02 | 8:07/mi
21M
2:38:39
Rank: #10281 (+87)
20M → 21M
8:22 | 8:22/mi
35K· 21.75 mi
2:44:30
Rank: #10311 (-30)
21M → 35K
5:51 | 7:49/mi
23M
2:54:28
Rank: #10233 (+78)
35K → 23M
9:58 | 7:58/mi
24M
3:02:12
Rank: #10149 (+84)
23M → 24M
7:44 | 7:44/mi
40K· 24.85 mi
3:08:56
Rank: #10088 (+61)
24M → 40K
6:44 | 7:53/mi
25.2M
3:11:54
Rank: #10063 (+25)
40K → 25.2M
2:58 | 8:36/mi
Finish· 26.22 mi
3:19:48
Rank: #10080 (-17)
25.2M → Finish
7:54 | 7:45/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
Time1:35:08
Pace7:15 /mi
2nd Half
Distance13.11 mi
Time1:44:40
Pace7:59 /mi
📊Positive Split: 10.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:50:3822:027:0622:02
7:06
-
10K
6.21 mi11:12:4844:127:0722:10
7:08
+0:02
15K
9.32 mi11:35:091:06:337:0822:21
7:12
+0:04
20K
12.43 mi11:58:281:29:527:1423:19
7:30
+0:18
Half
13.11 mi12:03:441:35:087:155:16
7:43
+0:13
25K
15.53 mi12:22:431:54:077:2118:59
7:50
+0:07
30K
18.64 mi12:47:512:19:157:2825:08
8:05
+0:15
20M
20.00 mi12:58:532:30:177:3111:02
8:07
+0:02
21M
21.00 mi13:07:152:38:397:338:22
8:22
+0:15
35K
21.75 mi13:13:062:44:307:345:51
7:49
-0:33
23M
23.00 mi13:23:042:54:287:359:58
7:58
+0:09
24M
24.00 mi13:30:483:02:127:367:44
7:44
-0:14
40K
24.85 mi13:37:323:08:567:366:44
7:53
+0:09
25.2M
25.20 mi13:40:303:11:547:372:58
8:36
+0:43
Finish
26.22 mi13:48:243:19:487:387:54
7:45
-0:51

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

7:06 /mi

Average Pace

7:38 /mi

Slowest Pace

8:36 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:29:52

45% of race

Time at Steady Pace

1:02:26

31% of race

Time at Slower Pace

47:30

24% of race

Average Pace: 7:37 /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 mi10:50:3822:027:0622:02
7:06
#8554
10K
6.21 mi11:12:4844:127:0722:10
7:08
#8735
15K
9.32 mi11:35:091:06:337:0822:21
7:12
#8834
20K
12.43 mi11:58:281:29:527:1423:19
7:30
#9266
Half
13.11 mi12:03:441:35:087:155:16
7:43
#9459
25K
15.53 mi12:22:431:54:077:2118:59
7:50
#9963
30K
18.64 mi12:47:512:19:157:2825:08
8:05
#10308
20M
20.00 mi12:58:532:30:177:3111:02
8:07
#10368
21M
21.00 mi13:07:152:38:397:338:22
8:22
#10281
35K
21.75 mi13:13:062:44:307:345:51
7:49
#10311
23M
23.00 mi13:23:042:54:287:359:58
7:58
#10233
24M
24.00 mi13:30:483:02:127:367:44
7:44
#10149
40K
24.85 mi13:37:323:08:567:366:44
7:53
#10088
25.2M
25.20 mi13:40:303:11:547:372:58
8:36
#10063
Finish
26.22 mi13:48:243:19:487:387:54
7:45
#10080
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi8554735573559056(Top 32%)7584(Top 47%)7584(Top 380%)
10K6.21 mi3.10 mi8735-1817443-887443-888951(Top 32%)7577(Top 47%)7577(Top 380%)
15K9.32 mi3.11 mi8834-997490-477490-479056(Top 32%)7584(Top 47%)7584(Top 380%)
20K12.43 mi3.11 mi9266-4327712-2227712-22210798(Top 38%)8397(Top 52%)8397(Top 421%)
Half13.11 mi0.68 mi9459-1937806-947806-9413465(Top 47%)9653(Top 60%)9653(Top 484%)
25K15.53 mi2.42 mi9963-5048052-2468052-24612566(Top 44%)9092(Top 56%)9092(Top 456%)
30K18.64 mi3.11 mi10308-3458173-1218173-12112005(Top 42%)8674(Top 54%)8674(Top 435%)
20M20.00 mi1.36 mi10368-608156+178156+1711214(Top 39%)8133(Top 50%)8133(Top 407%)
21M21.00 mi1.00 mi10281+878076+808076+809622(Top 34%)7165(Top 44%)7165(Top 359%)
35K21.75 mi0.75 mi10311-308065+118065+1110933(Top 38%)7816(Top 49%)7816(Top 392%)
23M23.00 mi1.25 mi10233+787974+917974+919726(Top 34%)7094(Top 44%)7094(Top 355%)
24M24.00 mi1.00 mi10149+847907+677907+679321(Top 33%)6815(Top 42%)6815(Top 341%)
40K24.85 mi0.85 mi10088+617843+647843+649284(Top 33%)6677(Top 41%)6677(Top 335%)
25.2M25.20 mi0.35 mi10063+257812+317812+319381(Top 33%)6633(Top 41%)6633(Top 332%)
Finish26.22 mi1.02 mi10080-177795+177795+1711056(Top 39%)7533(Top 47%)7533(Top 377%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 32%
×21stories
+97ft-345ft

Overall

9056

Males

7584

M50-54

7584

5K→10K

3.1 - 6.2 mi

Top 32%
×5stories
+79ft-138ft

Overall

8951

Males

7577

M50-54

7577

10K→15K

6.2 - 9.3 mi

Top 32%
×3stories
+67ft-78ft

Overall

9056

Males

7584

M50-54

7584

15K→20K

9.3 - 12.4 mi

Top 38%
×5stories
+106ft-86ft

Overall

10798

Males

8397

M50-54

8397

20K→Half

12.4 - 13.1 mi

Top 47%
×2stories
+19ft-37ft

Overall

13465

Males

9653

M50-54

9653

Half→25K

13.1 - 15.5 mi

Top 44%
×4stories
+66ft-88ft

Overall

12566

Males

9092

M50-54

9092

25K→30K

15.5 - 18.6 mi

Top 42%
×9stories
+181ft-148ft

Overall

12005

Males

8674

M50-54

8674

30K→20M

18.6 - 20.0 mi

Top 39%
×5stories
+64ft-50ft

Overall

11214

Males

8133

M50-54

8133

20M→21M

20.0 - 21.0 mi

Top 34%
×8stories
+106ft-24ft

Overall

9622

Males

7165

M50-54

7165

21M→35K

21.0 - 21.8 mi

Top 38%
×7stories
+17ft-86ft

Overall

10933

Males

7816

M50-54

7816

35K→23M

21.8 - 23.0 mi

Top 34%
×5stories
+23ft-63ft

Overall

9726

Males

7094

M50-54

7094

23M→24M

23.0 - 24.0 mi

Top 33%
×6stories
+12ft-82ft

Overall

9321

Males

6815

M50-54

6815

24M→40K

24.0 - 24.9 mi

Top 33%
×1story
+6ft-20ft

Overall

9284

Males

6677

M50-54

6677

40K→25.2M

24.9 - 25.2 mi

Top 33%
×1story
+13ft-16ft

Overall

9381

Males

6633

M50-54

6633

25.2M→Finish

25.2 - 26.2 mi

Top 39%
×2stories
+22ft-21ft

Overall

11056

Males

7533

M50-54

7533

Passing Analysis

Category:
Athletes Passed
1300
Passed By
2823
Net Change
-1526
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8554
5K → 10K123304-181#8554#8735
10K → 15K128227-99#8735#8834
15K → 20K73505-432#8834#9266
20K → Half4197-193#9266#9459
Half → 25K56560-504#9459#9963
25K → 30K143486-345#9963#10308
30K → 20M97157-60#10308#10368
20M → 21M14457+87#10368#10281
21M → 35K4979-30#10281#10311
35K → 23M14062+78#10311#10233
23M → 24M12238+84#10233#10149
24M → 40K10746+61#10149#10088
40K → 25.2M4722+25#10088#10063
25.2M → Finish6783-17#10063#10080
TOTALS13002823-1526
📊

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