Boston Marathon logo
BOSTON MARATHON 2023

Justin Riis

Bib: 7191•M

CA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 22%
Gender (Male)
#0 / 15176
Top 35%
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
22:44
Rank: #8199
Start → 5K
22:44 | 7:19/mi
10K· 6.21 mi
45:18
Rank: #8373 (-174)
5K → 10K
22:34 | 7:16/mi
15K· 9.32 mi
1:07:12
Rank: #7812 (+561)
10K → 15K
21:54 | 7:03/mi
20K· 12.43 mi
1:29:22
Rank: #7475 (+337)
15K → 20K
22:10 | 7:08/mi
Half· 13.11 mi
1:33:53
Rank: #7293 (+182)
20K → Half
4:31 | 6:37/mi
25K· 15.53 mi
1:50:59
Rank: #7028 (+265)
Half → 25K
17:06 | 7:03/mi
30K· 18.64 mi
2:14:41
Rank: #7121 (-93)
25K → 30K
23:42 | 7:38/mi
20M
2:23:55
Rank: #6800 (+321)
30K → 20M
9:14 | 6:48/mi
21M
2:31:06
Rank: #6552 (+248)
20M → 21M
7:11 | 7:11/mi
35K· 21.75 mi
2:36:08
Rank: #6420 (+132)
21M → 35K
5:02 | 6:44/mi
23M
2:44:45
Rank: #6179 (+241)
35K → 23M
8:37 | 6:53/mi
24M
2:51:47
Rank: #6069 (+110)
23M → 24M
7:02 | 7:02/mi
40K· 24.85 mi
2:57:54
Rank: #5976 (+93)
24M → 40K
6:07 | 7:09/mi
25.2M
3:00:34
Rank: #5945 (+31)
40K → 25.2M
2:40 | 7:44/mi
Finish· 26.22 mi
3:07:44
Rank: #5875 (+70)
25.2M → Finish
7:10 | 7:02/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 Half⚖️ Balanced
Distance13.11 mi
Time1:33:53
Pace7:10 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:33:51
Pace7:10 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:27:1922:447:1922:44
7:19
-
10K
6.21 mi10:49:5345:187:1722:34
7:16
-0:03
15K
9.32 mi11:11:471:07:127:1321:54
7:03
-0:13
20K
12.43 mi11:33:571:29:227:1122:10
7:08
+0:05
Half
13.11 mi11:38:281:33:537:104:31
6:37
-0:31
25K
15.53 mi11:55:341:50:597:0917:06
7:03
+0:26
30K
18.64 mi12:19:162:14:417:1423:42
7:38
+0:35
20M
20.00 mi12:28:302:23:557:129:14
6:48
-0:50
21M
21.00 mi12:35:412:31:067:127:11
7:11
+0:23
35K
21.75 mi12:40:432:36:087:115:02
6:44
-0:27
23M
23.00 mi12:49:202:44:457:108:37
6:53
+0:09
24M
24.00 mi12:56:222:51:477:097:02
7:02
+0:09
40K
24.85 mi13:02:292:57:547:096:07
7:09
+0:07
25.2M
25.20 mi13:05:093:00:347:102:40
7:44
+0:35
Finish
26.22 mi13:12:193:07:447:107:10
7:02
-0:42

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

6:37 /mi

Average Pace

7:10 /mi

Slowest Pace

7:44 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:18:38

74% of race

Time at Steady Pace

49:06

26% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:10 /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 mi10:27:1922:447:1922:44
7:19
#8199
10K
6.21 mi10:49:5345:187:1722:34
7:16
#8373
15K
9.32 mi11:11:471:07:127:1321:54
7:03
#7812
20K
12.43 mi11:33:571:29:227:1122:10
7:08
#7475
Half
13.11 mi11:38:281:33:537:104:31
6:37
#7293
25K
15.53 mi11:55:341:50:597:0917:06
7:03
#7028
30K
18.64 mi12:19:162:14:417:1423:42
7:38
#7121
20M
20.00 mi12:28:302:23:557:129:14
6:48
#6800
21M
21.00 mi12:35:412:31:067:127:11
7:11
#6552
35K
21.75 mi12:40:432:36:087:115:02
6:44
#6420
23M
23.00 mi12:49:202:44:457:108:37
6:53
#6179
24M
24.00 mi12:56:222:51:477:097:02
7:02
#6069
40K
24.85 mi13:02:292:57:547:096:07
7:09
#5976
25.2M
25.20 mi13:05:093:00:347:102:40
7:44
#5945
Finish
26.22 mi13:12:193:07:447:107:10
7:02
#5875
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi8199710371036845(Top 26%)6124(Top 40%)6124(Top 116%)
10K6.21 mi3.10 mi8373-1747192-897192-898551(Top 32%)7290(Top 48%)7290(Top 138%)
15K9.32 mi3.11 mi7812+5616832+3606832+3606845(Top 26%)6124(Top 40%)6124(Top 116%)
20K12.43 mi3.11 mi7475+3376592+2406592+2406727(Top 25%)6006(Top 40%)6006(Top 114%)
Half13.11 mi0.68 mi7293+1826457+1356457+1353660(Top 14%)3468(Top 23%)3468(Top 66%)
25K15.53 mi2.42 mi7028+2656258+1996258+1995860(Top 22%)5339(Top 35%)5339(Top 101%)
30K18.64 mi3.11 mi7121-936304-466304-468135(Top 31%)6762(Top 45%)6762(Top 128%)
20M20.00 mi1.36 mi6800+3216053+2516053+2512810(Top 11%)2657(Top 18%)2657(Top 50%)
21M21.00 mi1.00 mi6552+2485852+2015852+2013038(Top 11%)2849(Top 19%)2849(Top 54%)
35K21.75 mi0.75 mi6420+1325750+1025750+1023768(Top 14%)3485(Top 23%)3485(Top 66%)
23M23.00 mi1.25 mi6179+2415561+1895561+1893142(Top 12%)2928(Top 19%)2928(Top 55%)
24M24.00 mi1.00 mi6069+1105460+1015460+1014840(Top 18%)4309(Top 28%)4309(Top 82%)
40K24.85 mi0.85 mi5976+935379+815379+814646(Top 17%)4097(Top 27%)4097(Top 78%)
25.2M25.20 mi0.35 mi5945+315352+275352+275021(Top 19%)4298(Top 28%)4298(Top 81%)
Finish26.22 mi1.02 mi5875+705289+635289+635390(Top 20%)4529(Top 30%)4529(Top 86%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 26%
×21stories
+97ft-345ft

Overall

6845

Males

6124

M18-39

6124

5K→10K

3.1 - 6.2 mi

Top 32%
×5stories
+79ft-138ft

Overall

8551

Males

7290

M18-39

7290

10K→15K

6.2 - 9.3 mi

Top 26%
×3stories
+67ft-78ft

Overall

6845

Males

6124

M18-39

6124

15K→20K

9.3 - 12.4 mi

Top 25%
×5stories
+106ft-86ft

Overall

6727

Males

6006

M18-39

6006

20K→Half

12.4 - 13.1 mi

Top 14%
×2stories
+19ft-37ft

Overall

3660

Males

3468

M18-39

3468

Half→25K

13.1 - 15.5 mi

Top 22%
×4stories
+66ft-88ft

Overall

5860

Males

5339

M18-39

5339

25K→30K

15.5 - 18.6 mi

Top 31%
×9stories
+181ft-148ft

Overall

8135

Males

6762

M18-39

6762

30K→20M

18.6 - 20.0 mi

Top 11%
×5stories
+64ft-50ft

Overall

2810

Males

2657

M18-39

2657

20M→21M

20.0 - 21.0 mi

Top 11%
×8stories
+106ft-24ft

Overall

3038

Males

2849

M18-39

2849

21M→35K

21.0 - 21.8 mi

Top 14%
×7stories
+17ft-86ft

Overall

3768

Males

3485

M18-39

3485

35K→23M

21.8 - 23.0 mi

Top 12%
×5stories
+23ft-63ft

Overall

3142

Males

2928

M18-39

2928

23M→24M

23.0 - 24.0 mi

Top 18%
×6stories
+12ft-82ft

Overall

4840

Males

4309

M18-39

4309

24M→40K

24.0 - 24.9 mi

Top 17%
×1story
+6ft-20ft

Overall

4646

Males

4097

M18-39

4097

40K→25.2M

24.9 - 25.2 mi

Top 19%
×1story
+13ft-16ft

Overall

5021

Males

4298

M18-39

4298

25.2M→Finish

25.2 - 26.2 mi

Top 20%
×2stories
+22ft-21ft

Overall

5390

Males

4529

M18-39

4529

Passing Analysis

Category:
Athletes Passed
2897
Passed By
573
Net Change
+2324
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8199
5K → 10K152326-174#8199#8373
10K → 15K5676+561#8373#7812
15K → 20K35114+337#7812#7475
20K → Half1820+182#7475#7293
Half → 25K2694+265#7293#7028
25K → 30K87180-93#7028#7121
30K → 20M3210+321#7121#6800
20M → 21M2480+248#6800#6552
21M → 35K1320+132#6552#6420
35K → 23M2421+241#6420#6179
23M → 24M1188+110#6179#6069
24M → 40K974+93#6069#5976
40K → 25.2M387+31#5976#5945
25.2M → Finish9323+70#5945#5875
TOTALS2897573+2324
📊

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