Boston Marathon logo
BOSTON MARATHON 2025

Aleksander Jonca

MA

Bib: 31650 M

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

⏱️ Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
9:16/mi
28:46
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
9:46/mi
59:07
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
9:22/mi
1:28:12
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
10:27/mi
2:00:40
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
9:26/mi
2:07:06
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
10:08/mi
2:31:39
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
11:10/mi
3:06:22
↑ 181↓ 1480.2%
138 ft elev
20M
10:39/mi
3:20:51
↑ 64↓ 500.2%
148 ft elev
21M
12:35/mi
3:33:26
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
9:55/mi
3:40:51
↑ 17↓ 861.7%
156 ft elev
23M
10:45/mi
3:54:19
↑ 23↓ 630.6%
116 ft elev
24M
10:20/mi
4:04:39
↓ 821.3%
34 ft elev
40K· 24.85 mi
10:33/mi
4:13:40
↓ 200.3%
20 ft elev
25.2M
15:13/mi
4:18:55
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
10:06/mi
4:29:13
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Is this your race?

Claim it for a free AI report

A coach's-eye read of your race — emailed to you, free.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:07:06
Pace9:42 /mi
2nd Half
Distance13.11 mi
Time2:22:07
Pace10:50 /mi
📊Positive Split: 11.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:53:1128:469:1628:46
9:16
-
10K
6.21 mi12:23:3259:079:3130:21
9:46
+0:30
15K
9.32 mi12:52:371:28:129:2829:05
9:22
-0:24
20K
12.43 mi13:25:052:00:409:4332:28
10:27
+1:05
Half
13.11 mi13:31:312:07:069:426:26
9:26
-1:01
25K
15.53 mi13:56:042:31:399:4624:33
10:08
+0:42
30K
18.64 mi14:30:473:06:2210:0034:43
11:10
+1:02
20M
20.00 mi14:45:163:20:5110:0314:29
10:39
-0:31
21M
21.00 mi14:57:513:33:2610:1012:35
12:35
+1:56
35K
21.75 mi15:05:163:40:5110:097:25
9:55
-2:40
23M
23.00 mi15:18:443:54:1910:1113:28
10:45
+0:50
24M
24.00 mi15:29:044:04:3910:1210:20
10:20
-0:25
40K
24.85 mi15:38:054:13:4010:129:01
10:33
+0:13
25.2M
25.20 mi15:43:204:18:5510:165:15
15:13
+4:40
Finish
26.22 mi15:53:384:29:1310:1710:18
10:06
-5:07

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

9:16 /mi

Average Pace

10:17 /mi

Slowest Pace

15:13 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:04:17

24% of race

Time at Steady Pace

2:32:23

57% of race

Time at Slower Pace

52:33

20% of race

Average Pace: 10:16 /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 mi11:53:1128:469:1628:46
9:16
#23414
10K
6.21 mi12:23:3259:079:3130:21
9:46
#24218
15K
9.32 mi12:52:371:28:129:2829:05
9:22
#23940
20K
12.43 mi13:25:052:00:409:4332:28
10:27
#24329
Half
13.11 mi13:31:312:07:069:426:26
9:26
#24284
25K
15.53 mi13:56:042:31:399:4624:33
10:08
#24135
30K
18.64 mi14:30:473:06:2210:0034:43
11:10
#24223
20M
20.00 mi14:45:163:20:5110:0314:29
10:39
#24102
21M
21.00 mi14:57:513:33:2610:1012:35
12:35
#24146
35K
21.75 mi15:05:163:40:5110:097:25
9:55
#24071
23M
23.00 mi15:18:443:54:1910:1113:28
10:45
#23960
24M
24.00 mi15:29:044:04:3910:1210:20
10:20
#23898
40K
24.85 mi15:38:054:13:4010:129:01
10:33
#23831
25.2M
25.20 mi15:43:204:18:5510:165:15
15:13
#23950
Finish
26.22 mi15:53:384:29:1310:1710:18
10:06
#23931
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi234141395513955233711400914009
10K6.21 mi3.10 mi24218-80414351-39614351-396247711460214602
15K9.32 mi3.11 mi23940+27814234+11714234+117233711400914009
20K12.43 mi3.11 mi24329-38914387-15314387-153251081472214722
Half13.11 mi0.68 mi24284+4514365+2214365+22233501395013950
25K15.53 mi2.42 mi24135+14914292+7314292+73235551398513985
30K18.64 mi3.11 mi24223-8814312-2014312-20243331422614226
20M20.00 mi1.36 mi24102+12114228+8414228+84228501345213452
21M21.00 mi1.00 mi24146-4414244-1614244-16245101415014150
35K21.75 mi0.75 mi24071+7514194+5014194+50216591275412754
23M23.00 mi1.25 mi23960+11114117+7714117+77226541317713177
24M24.00 mi1.00 mi23898+6214085+3214085+32223451297912979
40K24.85 mi0.85 mi23831+6714037+4814037+48220411277012770
25.2M25.20 mi0.35 mi23950-11914087-5014087-50272701541415414
Finish26.22 mi1.02 mi23931+1914064+2314064+23232361339513395

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 82%
×21story building
+97ft-345ft

Overall

23371

Males

14009

M18-39

14009

5K→10K

3.1 - 6.2 mi

Top 87%
×5story building
+79ft-138ft

Overall

24771

Males

14602

M18-39

14602

10K→15K

6.2 - 9.3 mi

Top 82%
×3story building
+67ft-78ft

Overall

23371

Males

14009

M18-39

14009

15K→20K

9.3 - 12.4 mi

Top 88%
×5story building
+106ft-86ft

Overall

25108

Males

14722

M18-39

14722

20K→Half

12.4 - 13.1 mi

Top 82%
×2story building
+19ft-37ft

Overall

23350

Males

13950

M18-39

13950

Half→25K

13.1 - 15.5 mi

Top 83%
×4story building
+66ft-88ft

Overall

23555

Males

13985

M18-39

13985

25K→30K

15.5 - 18.6 mi

Top 86%
×9story building
+181ft-148ft

Overall

24333

Males

14226

M18-39

14226

30K→20M

18.6 - 20.0 mi

Top 80%
×5story building
+64ft-50ft

Overall

22850

Males

13452

M18-39

13452

20M→21M

20.0 - 21.0 mi

Top 86%
×8story building
+106ft-24ft

Overall

24510

Males

14150

M18-39

14150

21M→35K

21.0 - 21.8 mi

Top 76%
×7story building
+17ft-86ft

Overall

21659

Males

12754

M18-39

12754

35K→23M

21.8 - 23.0 mi

Top 80%
×5story building
+23ft-63ft

Overall

22654

Males

13177

M18-39

13177

23M→24M

23.0 - 24.0 mi

Top 79%
×6story building
+12ft-82ft

Overall

22345

Males

12979

M18-39

12979

24M→40K

24.0 - 24.9 mi

Top 78%
×1story
+6ft-20ft

Overall

22041

Males

12770

M18-39

12770

40K→25.2M

24.9 - 25.2 mi

Top 96%
×1story
+13ft-16ft

Overall

27270

Males

15414

M18-39

15414

25.2M→Finish

25.2 - 26.2 mi

Top 82%
×2story building
+22ft-21ft

Overall

23236

Males

13395

M18-39

13395

Passing Analysis

Category:
Athletes Passed
1364
Passed By
1881
Net Change
-517
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23414
5K → 10K46850-804#23414#24218
10K → 15K32345+278#24218#23940
15K → 20K46435-389#23940#24329
20K → Half527+45#24329#24284
Half → 25K18637+149#24284#24135
25K → 30K119207-88#24135#24223
30K → 20M13413+121#24223#24102
20M → 21M4690-44#24102#24146
21M → 35K783+75#24146#24071
35K → 23M12110+111#24071#23960
23M → 24M8321+62#23960#23898
24M → 40K8013+67#23898#23831
40K → 25.2M1120-119#23831#23950
25.2M → Finish4930+19#23950#23931
TOTALS13641881-517

Passing Charts

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