Boston Marathon logo
BOSTON MARATHON 2025

Daniel Grosso

Bib: 30036•M

MA

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

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
8:34/mi
26:38
↑ 97↓ 3451.5%
10K· 6.21 mi
8:20/mi
52:30
↑ 79↓ 1380.4%
15K· 9.32 mi
8:16/mi
1:18:10
↑ 67↓ 78
20K· 12.43 mi
8:19/mi
1:44:01
↑ 106↓ 860.1%
Half· 13.11 mi
8:20/mi
1:49:42
↑ 19↓ 370.5%
25K· 15.53 mi
8:24/mi
2:10:04
↑ 66↓ 880.2%
30K· 18.64 mi
8:32/mi
2:36:36
↑ 181↓ 1480.2%
20M
8:43/mi
2:48:27
↑ 64↓ 500.2%
21M
9:02/mi
2:57:29
↑ 106↓ 241.6%
35K· 21.75 mi
8:32/mi
3:03:52
↑ 17↓ 861.7%
23M
8:28/mi
3:14:28
↑ 23↓ 630.6%
24M
8:24/mi
3:22:52
↓ 821.3%
40K· 24.85 mi
8:35/mi
3:30:12
↓ 200.3%
25.2M
9:31/mi
3:33:29
↑ 13↓ 160.2%
Finish· 26.22 mi
8:10/mi
3:41:48
↑ 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
Time1:49:42
Pace8:22 /mi
2nd Half
Distance13.11 mi
Time1:52:06
Pace8:33 /mi
📊Positive Split: 2.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:46:5526:388:3426:38
8:34
-
10K
6.21 mi12:12:4752:308:2725:52
8:20
-0:14
15K
9.32 mi12:38:271:18:108:2325:40
8:16
-0:04
20K
12.43 mi13:04:181:44:018:2225:51
8:19
+0:03
Half
13.11 mi13:09:591:49:428:225:41
8:20
+0:01
25K
15.53 mi13:30:212:10:048:2220:22
8:24
+0:04
30K
18.64 mi13:56:532:36:368:2426:32
8:32
+0:08
20M
20.00 mi14:08:442:48:278:2511:51
8:43
+0:11
21M
21.00 mi14:17:462:57:298:279:02
9:02
+0:19
35K
21.75 mi14:24:093:03:528:276:23
8:32
-0:30
23M
23.00 mi14:34:453:14:288:2710:36
8:28
-0:04
24M
24.00 mi14:43:093:22:528:278:24
8:24
-0:04
40K
24.85 mi14:50:293:30:128:277:20
8:35
+0:11
25.2M
25.20 mi14:53:463:33:298:283:17
9:31
+0:56
Finish
26.22 mi15:02:053:41:488:288:19
8:10
-1:21

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

8:10 /mi

Average Pace

8:28 /mi

Slowest Pace

9:31 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:29:29

94% of race

Time at Steady Pace

12:19

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:28 /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 mi11:46:5526:388:3426:38
8:34
#20302
10K
6.21 mi12:12:4752:308:2725:52
8:20
#19528
15K
9.32 mi12:38:271:18:108:2325:40
8:16
#18947
20K
12.43 mi13:04:181:44:018:2225:51
8:19
#18443
Half
13.11 mi13:09:591:49:428:225:41
8:20
#18426
25K
15.53 mi13:30:212:10:048:2220:22
8:24
#18078
30K
18.64 mi13:56:532:36:368:2426:32
8:32
#17469
20M
20.00 mi14:08:442:48:278:2511:51
8:43
#17282
21M
21.00 mi14:17:462:57:298:279:02
9:02
#17028
35K
21.75 mi14:24:093:03:528:276:23
8:32
#16972
23M
23.00 mi14:34:453:14:288:2710:36
8:28
#16712
24M
24.00 mi14:43:093:22:528:278:24
8:24
#16571
40K
24.85 mi14:50:293:30:128:277:20
8:35
#16446
25.2M
25.20 mi14:53:463:33:298:283:17
9:31
#16416
Finish
26.22 mi15:02:053:41:488:288:19
8:10
#16323
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi20302125581255817792(Top 63%)11542(Top 72%)11542(Top 205%)
10K6.21 mi3.10 mi19528+77412272+28612272+28618702(Top 66%)11940(Top 74%)11940(Top 212%)
15K9.32 mi3.11 mi18947+58112013+25912013+25917792(Top 63%)11542(Top 72%)11542(Top 205%)
20K12.43 mi3.11 mi18443+50411798+21511798+21517034(Top 60%)11192(Top 69%)11192(Top 198%)
Half13.11 mi0.68 mi18426+17117981179818050(Top 64%)11640(Top 72%)11640(Top 206%)
25K15.53 mi2.42 mi18078+34811620+17811620+17816568(Top 58%)10906(Top 68%)10906(Top 193%)
30K18.64 mi3.11 mi17469+60911319+30111319+30115006(Top 53%)10059(Top 62%)10059(Top 178%)
20M20.00 mi1.36 mi17282+18711217+10211217+10215179(Top 53%)10003(Top 62%)10003(Top 177%)
21M21.00 mi1.00 mi17028+25411085+13211085+13213708(Top 48%)9207(Top 57%)9207(Top 163%)
35K21.75 mi0.75 mi16972+5611043+4211043+4215647(Top 55%)10015(Top 62%)10015(Top 178%)
23M23.00 mi1.25 mi16712+26010908+13510908+13513098(Top 46%)8749(Top 54%)8749(Top 155%)
24M24.00 mi1.00 mi16571+14110828+8010828+8013862(Top 49%)9087(Top 56%)9087(Top 161%)
40K24.85 mi0.85 mi16446+12510744+8410744+8413917(Top 49%)8966(Top 56%)8966(Top 159%)
25.2M25.20 mi0.35 mi16416+3010722+2210722+2214666(Top 52%)9259(Top 57%)9259(Top 164%)
Finish26.22 mi1.02 mi16323+9310660+6210660+6214001(Top 49%)9021(Top 56%)9021(Top 160%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 63%
×21story building
+97ft-345ft

Overall

17792

Males

11542

M18-39

11542

5K→10K

3.1 - 6.2 mi

Top 66%
×5story building
+79ft-138ft

Overall

18702

Males

11940

M18-39

11940

10K→15K

6.2 - 9.3 mi

Top 63%
×3story building
+67ft-78ft

Overall

17792

Males

11542

M18-39

11542

15K→20K

9.3 - 12.4 mi

Top 60%
×5story building
+106ft-86ft

Overall

17034

Males

11192

M18-39

11192

20K→Half

12.4 - 13.1 mi

Top 64%
×2story building
+19ft-37ft

Overall

18050

Males

11640

M18-39

11640

Half→25K

13.1 - 15.5 mi

Top 58%
×4story building
+66ft-88ft

Overall

16568

Males

10906

M18-39

10906

25K→30K

15.5 - 18.6 mi

Top 53%
×9story building
+181ft-148ft

Overall

15006

Males

10059

M18-39

10059

30K→20M

18.6 - 20.0 mi

Top 53%
×5story building
+64ft-50ft

Overall

15179

Males

10003

M18-39

10003

20M→21M

20.0 - 21.0 mi

Top 48%
×8story building
+106ft-24ft

Overall

13708

Males

9207

M18-39

9207

21M→35K

21.0 - 21.8 mi

Top 55%
×7story building
+17ft-86ft

Overall

15647

Males

10015

M18-39

10015

35K→23M

21.8 - 23.0 mi

Top 46%
×5story building
+23ft-63ft

Overall

13098

Males

8749

M18-39

8749

23M→24M

23.0 - 24.0 mi

Top 49%
×6story building
+12ft-82ft

Overall

13862

Males

9087

M18-39

9087

24M→40K

24.0 - 24.9 mi

Top 49%
×1story
+6ft-20ft

Overall

13917

Males

8966

M18-39

8966

40K→25.2M

24.9 - 25.2 mi

Top 52%
×1story
+13ft-16ft

Overall

14666

Males

9259

M18-39

9259

25.2M→Finish

25.2 - 26.2 mi

Top 49%
×2story building
+22ft-21ft

Overall

14001

Males

9021

M18-39

9021

Passing Analysis

Category:
Athletes Passed
4309
Passed By
330
Net Change
+3979
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20302
5K → 10K83157+774#20302#19528
10K → 15K61231+581#19528#18947
15K → 20K52521+504#18947#18443
20K → Half4023+17#18443#18426
Half → 25K37527+348#18426#18078
25K → 30K6178+609#18078#17469
30K → 20M21124+187#17469#17282
20M → 21M2639+254#17282#17028
21M → 35K9034+56#17028#16972
35K → 23M27212+260#16972#16712
23M → 24M15514+141#16712#16571
24M → 40K14520+125#16571#16446
40K → 25.2M4717+30#16446#16416
25.2M → Finish12633+93#16416#16323
TOTALS4309330+3979
📊

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
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing