Boston Marathon logo
BOSTON MARATHON 2023

Daniel Alonso

Bib: 2219•M

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Gender (Male)
#0 / 15176
Division (M18-39)
#0 / 5285
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:09
Rank: #7072
Start → 5K
22:09 | 7:08/mi
10K· 6.21 mi
45:03
Rank: #8115 (-1043)
5K → 10K
22:54 | 7:22/mi
15K· 9.32 mi
1:08:53
Rank: #9118 (-1003)
10K → 15K
23:50 | 7:40/mi
20K· 12.43 mi
1:34:01
Rank: #10392 (-1274)
15K → 20K
25:08 | 8:05/mi
Half· 13.11 mi
1:39:19
Rank: #10499 (-107)
20K → Half
5:18 | 7:46/mi
25K· 15.53 mi
2:00:04
Rank: #11528 (-1029)
Half → 25K
20:45 | 8:33/mi
30K· 18.64 mi
2:27:41
Rank: #12655 (-1127)
25K → 30K
27:37 | 8:53/mi
20M
2:40:20
Rank: #13178 (-523)
30K → 20M
12:39 | 9:18/mi
21M
2:49:38
Rank: #13280 (-102)
20M → 21M
9:18 | 9:18/mi
35K· 21.75 mi
2:56:34
Rank: #13554 (-274)
21M → 35K
6:56 | 9:16/mi
23M
3:08:26
Rank: #13904 (-350)
35K → 23M
11:52 | 9:29/mi
24M
3:17:15
Rank: #14011 (-107)
23M → 24M
8:49 | 8:49/mi
40K· 24.85 mi
3:24:52
Rank: #14073 (-62)
24M → 40K
7:37 | 8:54/mi
25.2M
3:28:23
Rank: #14165 (-92)
40K → 25.2M
3:31 | 10:12/mi
Finish· 26.22 mi
3:39:26
Rank: #14793 (-628)
25.2M → Finish
11:03 | 10:51/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
Time1:39:19
Pace7:35 /mi
2nd Half
Distance13.11 mi
Time2:00:07
Pace9:10 /mi
📊Positive Split: 20.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:0422:097:0822:09
7:08
-
10K
6.21 mi10:45:5845:037:1522:54
7:22
+0:14
15K
9.32 mi11:09:481:08:537:2323:50
7:40
+0:18
20K
12.43 mi11:34:561:34:017:3425:08
8:05
+0:25
Half
13.11 mi11:40:141:39:197:355:18
7:46
-0:19
25K
15.53 mi12:00:592:00:047:4420:45
8:33
+0:47
30K
18.64 mi12:28:362:27:417:5527:37
8:53
+0:20
20M
20.00 mi12:41:152:40:208:0112:39
9:18
+0:25
21M
21.00 mi12:50:332:49:388:059:18
9:18
0:00
35K
21.75 mi12:57:292:56:348:076:56
9:16
-0:02
23M
23.00 mi13:09:213:08:268:1211:52
9:29
+0:13
24M
24.00 mi13:18:103:17:158:138:49
8:49
-0:40
40K
24.85 mi13:25:473:24:528:157:37
8:54
+0:05
25.2M
25.20 mi13:29:183:28:238:163:31
10:12
+1:18
Finish
26.22 mi13:40:213:39:268:2311:03
10:51
+0:39

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

7:08 /mi

Average Pace

8:23 /mi

Slowest Pace

10:51 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:39:19

45% of race

Time at Steady Pace

1:33:41

43% of race

Time at Slower Pace

26:26

12% of race

Average Pace: 8:22 /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 mi10:23:0422:097:0822:09
7:08
#7072
10K
6.21 mi10:45:5845:037:1522:54
7:22
#8115
15K
9.32 mi11:09:481:08:537:2323:50
7:40
#9118
20K
12.43 mi11:34:561:34:017:3425:08
8:05
#10392
Half
13.11 mi11:40:141:39:197:355:18
7:46
#10499
25K
15.53 mi12:00:592:00:047:4420:45
8:33
#11528
30K
18.64 mi12:28:362:27:417:5527:37
8:53
#12655
20M
20.00 mi12:41:152:40:208:0112:39
9:18
#13178
21M
21.00 mi12:50:332:49:388:059:18
9:18
#13280
35K
21.75 mi12:57:292:56:348:076:56
9:16
#13554
23M
23.00 mi13:09:213:08:268:1211:52
9:29
#13904
24M
24.00 mi13:18:103:17:158:138:49
8:49
#14011
40K
24.85 mi13:25:473:24:528:157:37
8:54
#14073
25.2M
25.20 mi13:29:183:28:238:163:31
10:12
#14165
Finish
26.22 mi13:40:213:39:268:2311:03
10:51
#14793
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi70726326632611595(Top 44%)8903(Top 59%)8903(Top 168%)
10K6.21 mi3.10 mi8115-10437032-7067032-7069394(Top 35%)7804(Top 51%)7804(Top 148%)
15K9.32 mi3.11 mi9118-10037638-6067638-60611595(Top 44%)8903(Top 59%)8903(Top 168%)
20K12.43 mi3.11 mi10392-12748362-7248362-72414149(Top 53%)9943(Top 66%)9943(Top 188%)
Half13.11 mi0.68 mi10499-1078418-568418-5612427(Top 47%)9263(Top 61%)9263(Top 175%)
25K15.53 mi2.42 mi11528-10298860-4428860-44216522(Top 62%)10761(Top 71%)10761(Top 204%)
30K18.64 mi3.11 mi12655-11279290-4309290-43016574(Top 62%)10727(Top 71%)10727(Top 203%)
20M20.00 mi1.36 mi13178-5239494-2049494-20418036(Top 68%)11248(Top 74%)11248(Top 213%)
21M21.00 mi1.00 mi13280-1029522-289522-2815032(Top 56%)9929(Top 65%)9929(Top 188%)
35K21.75 mi0.75 mi13554-2749620-989620-9818978(Top 71%)11572(Top 76%)11572(Top 219%)
23M23.00 mi1.25 mi13904-3509719-999719-9918229(Top 68%)11213(Top 74%)11213(Top 212%)
24M24.00 mi1.00 mi14011-1079735-169735-1616260(Top 61%)10284(Top 68%)10284(Top 195%)
40K24.85 mi0.85 mi14073-629738-39738-315642(Top 59%)9968(Top 66%)9968(Top 189%)
25.2M25.20 mi0.35 mi14165-929765-279765-2718058(Top 68%)11041(Top 73%)11041(Top 209%)
Finish26.22 mi1.02 mi14793-6289988-2239988-22323674(Top 89%)13652(Top 90%)13652(Top 258%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 44%
×21stories
+97ft-345ft

Overall

11595

Males

8903

M18-39

8903

5K→10K

3.1 - 6.2 mi

Top 35%
×5stories
+79ft-138ft

Overall

9394

Males

7804

M18-39

7804

10K→15K

6.2 - 9.3 mi

Top 44%
×3stories
+67ft-78ft

Overall

11595

Males

8903

M18-39

8903

15K→20K

9.3 - 12.4 mi

Top 53%
×5stories
+106ft-86ft

Overall

14149

Males

9943

M18-39

9943

20K→Half

12.4 - 13.1 mi

Top 47%
×2stories
+19ft-37ft

Overall

12427

Males

9263

M18-39

9263

Half→25K

13.1 - 15.5 mi

Top 62%
×4stories
+66ft-88ft

Overall

16522

Males

10761

M18-39

10761

25K→30K

15.5 - 18.6 mi

Top 62%
×9stories
+181ft-148ft

Overall

16574

Males

10727

M18-39

10727

30K→20M

18.6 - 20.0 mi

Top 68%
×5stories
+64ft-50ft

Overall

18036

Males

11248

M18-39

11248

20M→21M

20.0 - 21.0 mi

Top 56%
×8stories
+106ft-24ft

Overall

15032

Males

9929

M18-39

9929

21M→35K

21.0 - 21.8 mi

Top 71%
×7stories
+17ft-86ft

Overall

18978

Males

11572

M18-39

11572

35K→23M

21.8 - 23.0 mi

Top 68%
×5stories
+23ft-63ft

Overall

18229

Males

11213

M18-39

11213

23M→24M

23.0 - 24.0 mi

Top 61%
×6stories
+12ft-82ft

Overall

16260

Males

10284

M18-39

10284

24M→40K

24.0 - 24.9 mi

Top 59%
×1story
+6ft-20ft

Overall

15642

Males

9968

M18-39

9968

40K→25.2M

24.9 - 25.2 mi

Top 68%
×1story
+13ft-16ft

Overall

18058

Males

11041

M18-39

11041

25.2M→Finish

25.2 - 26.2 mi

Top 89%
×2stories
+22ft-21ft

Overall

23674

Males

13652

M18-39

13652

Passing Analysis

Category:
Athletes Passed
312
Passed By
8031
Net Change
-7721
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7072
5K → 10K241067-1043#7072#8115
10K → 15K91012-1003#8115#9118
15K → 20K121284-1274#9118#10392
20K → Half9116-107#10392#10499
Half → 25K181047-1029#10499#11528
25K → 30K261153-1127#11528#12655
30K → 20M22545-523#12655#13178
20M → 21M54156-102#13178#13280
21M → 35K12286-274#13280#13554
35K → 23M24374-350#13554#13904
23M → 24M35142-107#13904#14011
24M → 40K52114-62#14011#14073
40K → 25.2M11103-92#14073#14165
25.2M → Finish4632-628#14165#14793
TOTALS3128031-7721
📊

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