Boston Marathon logo
BOSTON MARATHON 2025

Jason Markzon

Bib: 8975•M

DC

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Top 24%
Gender (Male)
#0 / 16105
Top 36%
Masters (Masters Men)
#0 / 10463
Top 23%
Division (M40-44)
#0 / 2247
Top 50%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
6:56/mi
21:33
↑ 97↓ 3451.5%
10K· 6.21 mi
6:53/mi
42:56
↑ 79↓ 1380.4%
15K· 9.32 mi
6:54/mi
1:04:22
↑ 67↓ 78
20K· 12.43 mi
6:54/mi
1:25:47
↑ 106↓ 860.1%
Half· 13.11 mi
6:46/mi
1:30:24
↑ 19↓ 370.5%
25K· 15.53 mi
6:56/mi
1:47:12
↑ 66↓ 880.2%
30K· 18.64 mi
7:06/mi
2:09:14
↑ 181↓ 1480.2%
20M
7:17/mi
2:19:08
↑ 64↓ 500.2%
21M
7:39/mi
2:26:47
↑ 106↓ 241.6%
35K· 21.75 mi
7:20/mi
2:32:16
↑ 17↓ 861.7%
23M
8:06/mi
2:42:25
↑ 23↓ 630.6%
24M
8:02/mi
2:50:27
↓ 821.3%
40K· 24.85 mi
9:07/mi
2:58:15
↓ 200.3%
25.2M
9:49/mi
3:01:38
↑ 13↓ 160.2%
Finish· 26.22 mi
7:21/mi
3:09:07
↑ 22↓ 21

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
Time1:30:24
Pace6:54 /mi
2nd Half
Distance13.11 mi
Time1:38:43
Pace7:32 /mi
📊Positive Split: 9.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:46:5921:336:5621:33
6:56
-
10K
6.21 mi11:08:2242:566:5521:23
6:53
-0:03
15K
9.32 mi11:29:481:04:226:5421:26
6:54
+0:01
20K
12.43 mi11:51:131:25:476:5421:25
6:54
0:00
Half
13.11 mi11:55:501:30:246:544:37
6:46
-0:08
25K
15.53 mi12:12:381:47:126:5416:48
6:56
+0:10
30K
18.64 mi12:34:402:09:146:5622:02
7:06
+0:10
20M
20.00 mi12:44:342:19:086:579:54
7:17
+0:11
21M
21.00 mi12:52:132:26:476:597:39
7:39
+0:22
35K
21.75 mi12:57:422:32:167:005:29
7:20
-0:19
23M
23.00 mi13:07:512:42:257:0410:09
8:06
+0:46
24M
24.00 mi13:15:532:50:277:068:02
8:02
-0:04
40K
24.85 mi13:23:412:58:157:107:48
9:07
+1:05
25.2M
25.20 mi13:27:043:01:387:123:23
9:49
+0:42
Finish
26.22 mi13:34:333:09:077:137:29
7:21
-2:28

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

6:46 /mi

Average Pace

7:13 /mi

Slowest Pace

9:49 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

4:37

2% of race

Time at Steady Pace

2:35:08

82% of race

Time at Slower Pace

29:22

16% of race

Average Pace: 7:13 /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 mi10:46:5921:336:5621:33
6:56
#7328
10K
6.21 mi11:08:2242:566:5521:23
6:53
#7220
15K
9.32 mi11:29:481:04:226:5421:26
6:54
#7117
20K
12.43 mi11:51:131:25:476:5421:25
6:54
#6840
Half
13.11 mi11:55:501:30:246:544:37
6:46
#6797
25K
15.53 mi12:12:381:47:126:5416:48
6:56
#6575
30K
18.64 mi12:34:402:09:146:5622:02
7:06
#6213
20M
20.00 mi12:44:342:19:086:579:54
7:17
#6105
21M
21.00 mi12:52:132:26:476:597:39
7:39
#6017
35K
21.75 mi12:57:422:32:167:005:29
7:20
#6045
23M
23.00 mi13:07:512:42:257:0410:09
8:06
#6188
24M
24.00 mi13:15:532:50:277:068:02
8:02
#6327
40K
24.85 mi13:23:412:58:157:107:48
9:07
#6645
25.2M
25.20 mi13:27:043:01:387:123:23
9:49
#6808
Finish
26.22 mi13:34:333:09:077:137:29
7:21
#6806
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi7328653865386946(Top 24%)6210(Top 39%)6210(Top 276%)
10K6.21 mi3.10 mi7220+1086460+786460+787111(Top 25%)6363(Top 40%)6363(Top 283%)
15K9.32 mi3.11 mi7117+1036374+866374+866946(Top 24%)6210(Top 39%)6210(Top 276%)
20K12.43 mi3.11 mi6840+2776160+2146160+2146143(Top 22%)5545(Top 34%)5545(Top 247%)
Half13.11 mi0.68 mi6797+436124+366124+365872(Top 21%)5359(Top 33%)5359(Top 238%)
25K15.53 mi2.42 mi6575+2225927+1975927+1975859(Top 21%)5285(Top 33%)5285(Top 235%)
30K18.64 mi3.11 mi6213+3625601+3265601+3265273(Top 19%)4758(Top 30%)4758(Top 212%)
20M20.00 mi1.36 mi6105+1085503+985503+985710(Top 20%)4990(Top 31%)4990(Top 222%)
21M21.00 mi1.00 mi6017+885419+845419+845401(Top 19%)4671(Top 29%)4671(Top 208%)
35K21.75 mi0.75 mi6045-285427-85427-87394(Top 26%)5928(Top 37%)5928(Top 264%)
23M23.00 mi1.25 mi6188-1435522-955522-9510761(Top 38%)7613(Top 47%)7613(Top 339%)
24M24.00 mi1.00 mi6327-1395605-835605-8311444(Top 40%)7865(Top 49%)7865(Top 350%)
40K24.85 mi0.85 mi6645-3185796-1915796-19116926(Top 60%)10333(Top 64%)10333(Top 460%)
25.2M25.20 mi0.35 mi6808-1635896-1005896-10016044(Top 56%)9869(Top 61%)9869(Top 439%)
Finish26.22 mi1.02 mi6806+25864+325864+328050(Top 28%)5935(Top 37%)5935(Top 264%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 24%
×21story building
+97ft-345ft

Overall

6946

Males

6210

M40-44

6210

5K→10K

3.1 - 6.2 mi

Top 25%
×5story building
+79ft-138ft

Overall

7111

Males

6363

M40-44

6363

10K→15K

6.2 - 9.3 mi

Top 24%
×3story building
+67ft-78ft

Overall

6946

Males

6210

M40-44

6210

15K→20K

9.3 - 12.4 mi

Top 22%
×5story building
+106ft-86ft

Overall

6143

Males

5545

M40-44

5545

20K→Half

12.4 - 13.1 mi

Top 21%
×2story building
+19ft-37ft

Overall

5872

Males

5359

M40-44

5359

Half→25K

13.1 - 15.5 mi

Top 21%
×4story building
+66ft-88ft

Overall

5859

Males

5285

M40-44

5285

25K→30K

15.5 - 18.6 mi

Top 19%
×9story building
+181ft-148ft

Overall

5273

Males

4758

M40-44

4758

30K→20M

18.6 - 20.0 mi

Top 20%
×5story building
+64ft-50ft

Overall

5710

Males

4990

M40-44

4990

20M→21M

20.0 - 21.0 mi

Top 19%
×8story building
+106ft-24ft

Overall

5401

Males

4671

M40-44

4671

21M→35K

21.0 - 21.8 mi

Top 26%
×7story building
+17ft-86ft

Overall

7394

Males

5928

M40-44

5928

35K→23M

21.8 - 23.0 mi

Top 38%
×5story building
+23ft-63ft

Overall

10761

Males

7613

M40-44

7613

23M→24M

23.0 - 24.0 mi

Top 40%
×6story building
+12ft-82ft

Overall

11444

Males

7865

M40-44

7865

24M→40K

24.0 - 24.9 mi

Top 60%
×1story
+6ft-20ft

Overall

16926

Males

10333

M40-44

10333

40K→25.2M

24.9 - 25.2 mi

Top 56%
×1story
+13ft-16ft

Overall

16044

Males

9869

M40-44

9869

25.2M→Finish

25.2 - 26.2 mi

Top 28%
×2story building
+22ft-21ft

Overall

8050

Males

5935

M40-44

5935

Passing Analysis

Category:
Athletes Passed
1881
Passed By
1359
Net Change
+522
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7328
5K → 10K260152+108#7328#7220
10K → 15K18885+103#7220#7117
15K → 20K31033+277#7117#6840
20K → Half518+43#6840#6797
Half → 25K24624+222#6797#6575
25K → 30K38927+362#6575#6213
30K → 20M12618+108#6213#6105
20M → 21M11628+88#6105#6017
21M → 35K3361-28#6017#6045
35K → 23M53196-143#6045#6188
23M → 24M27166-139#6188#6327
24M → 40K13331-318#6327#6645
40K → 25.2M9172-163#6645#6808
25.2M → Finish6058+2#6808#6806
TOTALS18811359+522
📊

Passing Visuals

Category:
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

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing