Boston Marathon logo
BOSTON MARATHON 2025

Jaro Sosko

Bib: 13359•M

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 37%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:57
Rank: #11179
Start → 5K
22:57 | 7:23/mi
10K· 6.21 mi
45:48
Rank: #10955 (+224)
5K → 10K
22:51 | 7:21/mi
15K· 9.32 mi
1:08:44
Rank: #10833 (+122)
10K → 15K
22:56 | 7:23/mi
20K· 12.43 mi
1:31:33
Rank: #10460 (+373)
15K → 20K
22:49 | 7:21/mi
Half· 13.11 mi
1:36:29
Rank: #10385 (+75)
20K → Half
4:56 | 7:14/mi
25K· 15.53 mi
1:54:25
Rank: #10141 (+244)
Half → 25K
17:56 | 7:24/mi
30K· 18.64 mi
2:18:08
Rank: #9787 (+354)
25K → 30K
23:43 | 7:38/mi
20M
2:28:38
Rank: #9650 (+137)
30K → 20M
10:30 | 7:44/mi
21M
2:36:54
Rank: #9567 (+83)
20M → 21M
8:16 | 8:16/mi
35K· 21.75 mi
2:42:33
Rank: #9524 (+43)
21M → 35K
5:39 | 7:33/mi
23M
2:52:32
Rank: #9508 (+16)
35K → 23M
9:59 | 7:58/mi
24M
3:00:33
Rank: #9584 (-76)
23M → 24M
8:01 | 8:01/mi
40K· 24.85 mi
3:07:45
Rank: #9700 (-116)
24M → 40K
7:12 | 8:25/mi
25.2M
3:10:55
Rank: #9737 (-37)
40K → 25.2M
3:10 | 9:11/mi
Finish· 26.22 mi
3:19:10
Rank: #9874 (-137)
25.2M → Finish
8:15 | 8:06/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
Time1:36:29
Pace7:22 /mi
2nd Half
Distance13.11 mi
Time1:42:41
Pace7:50 /mi
📊Positive Split: 6.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:3522:577:2322:57
7:23
-
10K
6.21 mi11:14:2645:487:2222:51
7:21
-0:02
15K
9.32 mi11:37:221:08:447:2222:56
7:23
+0:02
20K
12.43 mi12:00:111:31:337:2222:49
7:21
-0:02
Half
13.11 mi12:05:071:36:297:224:56
7:14
-0:07
25K
15.53 mi12:23:031:54:257:2217:56
7:24
+0:10
30K
18.64 mi12:46:462:18:087:2523:43
7:38
+0:14
20M
20.00 mi12:57:162:28:387:2610:30
7:44
+0:06
21M
21.00 mi13:05:322:36:547:288:16
8:16
+0:32
35K
21.75 mi13:11:112:42:337:285:39
7:33
-0:43
23M
23.00 mi13:21:102:52:327:309:59
7:58
+0:25
24M
24.00 mi13:29:113:00:337:318:01
8:01
+0:03
40K
24.85 mi13:36:233:07:457:337:12
8:25
+0:24
25.2M
25.20 mi13:39:333:10:557:353:10
9:11
+0:46
Finish
26.22 mi13:47:483:19:107:368:15
8:06
-1:05

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

7:14 /mi

Average Pace

7:36 /mi

Slowest Pace

9:11 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

50:36

25% of race

Time at Steady Pace

1:43:41

52% of race

Time at Slower Pace

44:53

23% of race

Average Pace: 7:36 /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 mi10:51:3522:577:2322:57
7:23
#11179
10K
6.21 mi11:14:2645:487:2222:51
7:21
#10955
15K
9.32 mi11:37:221:08:447:2222:56
7:23
#10833
20K
12.43 mi12:00:111:31:337:2222:49
7:21
#10460
Half
13.11 mi12:05:071:36:297:224:56
7:14
#10385
25K
15.53 mi12:23:031:54:257:2217:56
7:24
#10141
30K
18.64 mi12:46:462:18:087:2523:43
7:38
#9787
20M
20.00 mi12:57:162:28:387:2610:30
7:44
#9650
21M
21.00 mi13:05:322:36:547:288:16
8:16
#9567
35K
21.75 mi13:11:112:42:337:285:39
7:33
#9524
23M
23.00 mi13:21:102:52:327:309:59
7:58
#9508
24M
24.00 mi13:29:113:00:337:318:01
8:01
#9584
40K
24.85 mi13:36:233:07:457:337:12
8:25
#9700
25.2M
25.20 mi13:39:333:10:557:353:10
9:11
#9737
Finish
26.22 mi13:47:483:19:107:368:15
8:06
#9874
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi111798786878610677(Top 38%)8437(Top 52%)8437(Top 423%)
10K6.21 mi3.10 mi10955+2248642+1448642+14410780(Top 38%)8550(Top 53%)8550(Top 428%)
15K9.32 mi3.11 mi10833+1228565+778565+7710677(Top 38%)8437(Top 52%)8437(Top 423%)
20K12.43 mi3.11 mi10460+3738353+2128353+2129388(Top 33%)7674(Top 48%)7674(Top 384%)
Half13.11 mi0.68 mi10385+758302+518302+519332(Top 33%)7675(Top 48%)7675(Top 385%)
25K15.53 mi2.42 mi10141+2448137+1658137+1659119(Top 32%)7411(Top 46%)7411(Top 371%)
30K18.64 mi3.11 mi9787+3547896+2417896+2418697(Top 31%)6986(Top 43%)6986(Top 350%)
20M20.00 mi1.36 mi9650+1377789+1077789+1078542(Top 30%)6760(Top 42%)6760(Top 339%)
21M21.00 mi1.00 mi9567+837716+737716+738998(Top 32%)6817(Top 42%)6817(Top 342%)
35K21.75 mi0.75 mi9524+437675+417675+419000(Top 32%)6862(Top 43%)6862(Top 344%)
23M23.00 mi1.25 mi9508+167624+517624+519831(Top 35%)7149(Top 44%)7149(Top 358%)
24M24.00 mi1.00 mi9584-767621+37621+311317(Top 40%)7808(Top 48%)7808(Top 391%)
40K24.85 mi0.85 mi9700-1167648-277648-2712885(Top 45%)8464(Top 53%)8464(Top 424%)
25.2M25.20 mi0.35 mi9737-377647+17647+112736(Top 45%)8321(Top 52%)8321(Top 417%)
Finish26.22 mi1.02 mi9874-1377690-437690-4313524(Top 48%)8771(Top 54%)8771(Top 439%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 38%
×21stories
+97ft-345ft

Overall

10677

Males

8437

M50-54

8437

5K→10K

3.1 - 6.2 mi

Top 38%
×5stories
+79ft-138ft

Overall

10780

Males

8550

M50-54

8550

10K→15K

6.2 - 9.3 mi

Top 38%
×3stories
+67ft-78ft

Overall

10677

Males

8437

M50-54

8437

15K→20K

9.3 - 12.4 mi

Top 33%
×5stories
+106ft-86ft

Overall

9388

Males

7674

M50-54

7674

20K→Half

12.4 - 13.1 mi

Top 33%
×2stories
+19ft-37ft

Overall

9332

Males

7675

M50-54

7675

Half→25K

13.1 - 15.5 mi

Top 32%
×4stories
+66ft-88ft

Overall

9119

Males

7411

M50-54

7411

25K→30K

15.5 - 18.6 mi

Top 31%
×9stories
+181ft-148ft

Overall

8697

Males

6986

M50-54

6986

30K→20M

18.6 - 20.0 mi

Top 30%
×5stories
+64ft-50ft

Overall

8542

Males

6760

M50-54

6760

20M→21M

20.0 - 21.0 mi

Top 32%
×8stories
+106ft-24ft

Overall

8998

Males

6817

M50-54

6817

21M→35K

21.0 - 21.8 mi

Top 32%
×7stories
+17ft-86ft

Overall

9000

Males

6862

M50-54

6862

35K→23M

21.8 - 23.0 mi

Top 35%
×5stories
+23ft-63ft

Overall

9831

Males

7149

M50-54

7149

23M→24M

23.0 - 24.0 mi

Top 40%
×6stories
+12ft-82ft

Overall

11317

Males

7808

M50-54

7808

24M→40K

24.0 - 24.9 mi

Top 45%
×1story
+6ft-20ft

Overall

12885

Males

8464

M50-54

8464

40K→25.2M

24.9 - 25.2 mi

Top 45%
×1story
+13ft-16ft

Overall

12736

Males

8321

M50-54

8321

25.2M→Finish

25.2 - 26.2 mi

Top 48%
×2stories
+22ft-21ft

Overall

13524

Males

8771

M50-54

8771

Passing Analysis

Category:
Athletes Passed
2457*
Passed By
1151
Net Change
+1305
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11179
5K → 10K385161+224#11179#10955
10K → 15K229107+122#10955#10833
15K → 20K40128+373#10833#10460
20K → Half772+75#10460#10385
Half → 25K28743+244#10385#10141
25K → 30K409*55+354#10141#9787
30K → 20M17941+137#9787#9650
20M → 21M12845+83#9650#9567
21M → 35K8037+43#9567#9524
35K → 23M117101+16#9524#9508
23M → 24M60136-76#9508#9584
24M → 40K41157-116#9584#9700
40K → 25.2M3067-37#9700#9737
25.2M → Finish34171-137#9737#9874
TOTALS2457*1151+1305

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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