Boston Marathon logo
BOSTON MARATHON 2023

James Garrison

Bib: 29742•M

MA

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

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
9:57/mi
30:56
↑ 97↓ 3451.5%
10K· 6.21 mi
8:41/mi
57:54
↑ 79↓ 1380.4%
15K· 9.32 mi
8:05/mi
1:23:02
↑ 67↓ 78
20K· 12.43 mi
8:17/mi
1:48:46
↑ 106↓ 860.1%
Half· 13.11 mi
8:08/mi
1:54:19
↑ 19↓ 370.5%
25K· 15.53 mi
9:02/mi
2:16:13
↑ 66↓ 880.2%
30K· 18.64 mi
9:42/mi
2:46:21
↑ 181↓ 1480.2%
20M
9:07/mi
2:58:45
↑ 64↓ 500.2%
21M
9:57/mi
3:08:42
↑ 106↓ 241.6%
35K· 21.75 mi
9:03/mi
3:15:28
↑ 17↓ 861.7%
23M
10:29/mi
3:28:35
↑ 23↓ 630.6%
24M
10:19/mi
3:38:54
↓ 821.3%
40K· 24.85 mi
9:58/mi
3:47:25
↓ 200.3%
25.2M
9:46/mi
3:50:47
↑ 13↓ 160.2%
Finish· 26.22 mi
8:28/mi
3:59:25
↑ 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
Time1:54:19
Pace8:43 /mi
2nd Half
Distance13.11 mi
Time2:05:06
Pace9:33 /mi
📊Positive Split: 9.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:49:5730:569:5730:56
9:57
-
10K
6.21 mi12:16:5557:549:1926:58
8:41
-1:16
15K
9.32 mi12:42:031:23:028:5525:08
8:05
-0:36
20K
12.43 mi13:07:471:48:468:4525:44
8:17
+0:12
Half
13.11 mi13:13:201:54:198:435:33
8:08
-0:09
25K
15.53 mi13:35:142:16:138:4621:54
9:02
+0:54
30K
18.64 mi14:05:222:46:218:5530:08
9:42
+0:40
20M
20.00 mi14:17:462:58:458:5612:24
9:07
-0:35
21M
21.00 mi14:27:433:08:428:599:57
9:57
+0:50
35K
21.75 mi14:34:293:15:288:596:46
9:03
-0:54
23M
23.00 mi14:47:363:28:359:0413:07
10:29
+1:26
24M
24.00 mi14:57:553:38:549:0710:19
10:19
-0:10
40K
24.85 mi15:06:263:47:259:098:31
9:58
-0:21
25.2M
25.20 mi15:09:483:50:479:093:22
9:46
-0:12
Finish
26.22 mi15:18:263:59:259:088:38
8:28
-1:18

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

8:05 /mi

Average Pace

9:08 /mi

Slowest Pace

10:29 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:32:01

38% of race

Time at Steady Pace

41:04

17% of race

Time at Slower Pace

1:46:20

44% of race

Average Pace: 9:08 /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 mi11:49:5730:569:5730:56
9:57
#23339
10K
6.21 mi12:16:5557:549:1926:58
8:41
#21786
15K
9.32 mi12:42:031:23:028:5525:08
8:05
#20155
20K
12.43 mi13:07:471:48:468:4525:44
8:17
#19074
Half
13.11 mi13:13:201:54:198:435:33
8:08
#18912
25K
15.53 mi13:35:142:16:138:4621:54
9:02
#18939
30K
18.64 mi14:05:222:46:218:5530:08
9:42
#19227
20M
20.00 mi14:17:462:58:458:5612:24
9:07
#19064
21M
21.00 mi14:27:433:08:428:599:57
9:57
#18990
35K
21.75 mi14:34:293:15:288:596:46
9:03
#18954
23M
23.00 mi14:47:363:28:359:0413:07
10:29
#19158
24M
24.00 mi14:57:553:38:549:0710:19
10:19
#19323
40K
24.85 mi15:06:263:47:259:098:31
9:58
#19375
25.2M
25.20 mi15:09:483:50:479:093:22
9:46
#19330
Finish
26.22 mi15:18:263:59:259:088:38
8:28
#19205
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi23339137471374715090(Top 57%)10349(Top 68%)10349(Top 196%)
10K6.21 mi3.10 mi21786+155313028+71913028+71919302(Top 73%)12015(Top 79%)12015(Top 227%)
15K9.32 mi3.11 mi20155+163112312+71612312+71615090(Top 57%)10349(Top 68%)10349(Top 196%)
20K12.43 mi3.11 mi19074+108111894+41811894+41815500(Top 58%)10454(Top 69%)10454(Top 198%)
Half13.11 mi0.68 mi18912+16211822+7211822+7215331(Top 58%)10443(Top 69%)10443(Top 198%)
25K15.53 mi2.42 mi18939-2711832-1011832-1019121(Top 72%)11901(Top 78%)11901(Top 225%)
30K18.64 mi3.11 mi19227-28811935-10311935-10320134(Top 76%)12264(Top 81%)12264(Top 232%)
20M20.00 mi1.36 mi19064+16311855+8011855+8017190(Top 65%)10898(Top 72%)10898(Top 206%)
21M21.00 mi1.00 mi18990+7411810+4511810+4517849(Top 67%)11167(Top 74%)11167(Top 211%)
35K21.75 mi0.75 mi18954+3611783+2711783+2718075(Top 68%)11177(Top 74%)11177(Top 211%)
23M23.00 mi1.25 mi19158-20411864-8111864-8121249(Top 80%)12575(Top 83%)12575(Top 238%)
24M24.00 mi1.00 mi19323-16511934-7011934-7021587(Top 81%)12673(Top 84%)12673(Top 240%)
40K24.85 mi0.85 mi19375-5211939-511939-519856(Top 75%)11857(Top 78%)11857(Top 224%)
25.2M25.20 mi0.35 mi19330+4511920+1911920+1916357(Top 61%)10280(Top 68%)10280(Top 195%)
Finish26.22 mi1.02 mi19205+12511856+6411856+6415234(Top 57%)9840(Top 65%)9840(Top 186%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 57%
×21story building
+97ft-345ft

Overall

15090

Males

10349

M18-39

10349

5K→10K

3.1 - 6.2 mi

Top 73%
×5story building
+79ft-138ft

Overall

19302

Males

12015

M18-39

12015

10K→15K

6.2 - 9.3 mi

Top 57%
×3story building
+67ft-78ft

Overall

15090

Males

10349

M18-39

10349

15K→20K

9.3 - 12.4 mi

Top 58%
×5story building
+106ft-86ft

Overall

15500

Males

10454

M18-39

10454

20K→Half

12.4 - 13.1 mi

Top 58%
×2story building
+19ft-37ft

Overall

15331

Males

10443

M18-39

10443

Half→25K

13.1 - 15.5 mi

Top 72%
×4story building
+66ft-88ft

Overall

19121

Males

11901

M18-39

11901

25K→30K

15.5 - 18.6 mi

Top 76%
×9story building
+181ft-148ft

Overall

20134

Males

12264

M18-39

12264

30K→20M

18.6 - 20.0 mi

Top 65%
×5story building
+64ft-50ft

Overall

17190

Males

10898

M18-39

10898

20M→21M

20.0 - 21.0 mi

Top 67%
×8story building
+106ft-24ft

Overall

17849

Males

11167

M18-39

11167

21M→35K

21.0 - 21.8 mi

Top 68%
×7story building
+17ft-86ft

Overall

18075

Males

11177

M18-39

11177

35K→23M

21.8 - 23.0 mi

Top 80%
×5story building
+23ft-63ft

Overall

21249

Males

12575

M18-39

12575

23M→24M

23.0 - 24.0 mi

Top 81%
×6story building
+12ft-82ft

Overall

21587

Males

12673

M18-39

12673

24M→40K

24.0 - 24.9 mi

Top 75%
×1story
+6ft-20ft

Overall

19856

Males

11857

M18-39

11857

40K→25.2M

24.9 - 25.2 mi

Top 61%
×1story
+13ft-16ft

Overall

16357

Males

10280

M18-39

10280

25.2M→Finish

25.2 - 26.2 mi

Top 57%
×2story building
+22ft-21ft

Overall

15234

Males

9840

M18-39

9840

Passing Analysis

Category:
Athletes Passed
5257
Passed By
1123
Net Change
+4134
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23339
5K → 10K15574+1553#23339#21786
10K → 15K16310+1631#21786#20155
15K → 20K10810+1081#20155#19074
20K → Half1620+162#19074#18912
Half → 25K115142-27#18912#18939
25K → 30K83371-288#18939#19227
30K → 20M18421+163#19227#19064
20M → 21M10733+74#19064#18990
21M → 35K6226+36#18990#18954
35K → 23M33237-204#18954#19158
23M → 24M23188-165#19158#19323
24M → 40K3587-52#19323#19375
40K → 25.2M505+45#19375#19330
25.2M → Finish1349+125#19330#19205
TOTALS52571123+4134
📊

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