Boston Marathon logo
BOSTON MARATHON 2023

Ruben Chairez

Bib: 420•M

SC

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 0.6%
Gender (Male)
#0 / 15176
Top 0.9%
Division (M18-39)
#0 / 5285
Top 2%
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
5:28/mi
16:59
↑ 97↓ 3451.5%
10K· 6.21 mi
5:29/mi
34:02
↑ 79↓ 1380.4%
15K· 9.32 mi
5:33/mi
51:17
↑ 67↓ 78
20K· 12.43 mi
5:35/mi
1:08:38
↑ 106↓ 860.1%
Half· 13.11 mi
5:33/mi
1:12:25
↑ 19↓ 370.5%
25K· 15.53 mi
5:41/mi
1:26:11
↑ 66↓ 880.2%
30K· 18.64 mi
5:52/mi
1:44:25
↑ 181↓ 1480.2%
20M
5:57/mi
1:52:30
↑ 64↓ 500.2%
21M
6:32/mi
1:59:02
↑ 106↓ 241.6%
35K· 21.75 mi
5:46/mi
2:03:21
↑ 17↓ 861.7%
23M
5:57/mi
2:10:48
↑ 23↓ 630.6%
24M
5:49/mi
2:16:37
↓ 821.3%
40K· 24.85 mi
6:10/mi
2:21:53
↓ 200.3%
25.2M
6:46/mi
2:24:13
↑ 13↓ 160.2%
Finish· 26.22 mi
6:00/mi
2:30:20
↑ 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
Time1:12:25
Pace5:31 /mi
2nd Half
Distance13.11 mi
Time1:17:55
Pace5:57 /mi
📊Positive Split: 7.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:17:0116:595:2816:59
5:28
-
10K
6.21 mi10:34:0434:025:2917:03
5:29
+0:01
15K
9.32 mi10:51:1951:175:3017:15
5:33
+0:04
20K
12.43 mi11:08:401:08:385:3117:21
5:35
+0:02
Half
13.11 mi11:12:271:12:255:313:47
5:33
-0:02
25K
15.53 mi11:26:131:26:115:3313:46
5:41
+0:08
30K
18.64 mi11:44:271:44:255:3618:14
5:52
+0:11
20M
20.00 mi11:52:321:52:305:378:05
5:57
+0:05
21M
21.00 mi11:59:041:59:025:406:32
6:32
+0:35
35K
21.75 mi12:03:232:03:215:404:19
5:46
-0:46
23M
23.00 mi12:10:502:10:485:417:27
5:57
+0:11
24M
24.00 mi12:16:392:16:375:425:49
5:49
-0:08
40K
24.85 mi12:21:552:21:535:435:16
6:10
+0:21
25.2M
25.20 mi12:24:152:24:135:432:20
6:46
+0:36
Finish
26.22 mi12:30:222:30:205:446:07
6:00
-0:46

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

5:28 /mi

Average Pace

5:44 /mi

Slowest Pace

6:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:12:25

48% of race

Time at Steady Pace

57:40

38% of race

Time at Slower Pace

20:15

13% of race

Average Pace: 5:44 /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 mi10:17:0116:595:2816:59
5:28
#116
10K
6.21 mi10:34:0434:025:2917:03
5:29
#120
15K
9.32 mi10:51:1951:175:3017:15
5:33
#126
20K
12.43 mi11:08:401:08:385:3117:21
5:35
#127
Half
13.11 mi11:12:271:12:255:313:47
5:33
#126
25K
15.53 mi11:26:131:26:115:3313:46
5:41
#133
30K
18.64 mi11:44:271:44:255:3618:14
5:52
#137
20M
20.00 mi11:52:321:52:305:378:05
5:57
#139
21M
21.00 mi11:59:041:59:025:406:32
6:32
#146
35K
21.75 mi12:03:232:03:215:404:19
5:46
#149
23M
23.00 mi12:10:502:10:485:417:27
5:57
#150
24M
24.00 mi12:16:392:16:375:425:49
5:49
#146
40K
24.85 mi12:21:552:21:535:435:16
6:10
#150
25.2M
25.20 mi12:24:152:24:135:432:20
6:46
#152
Finish
26.22 mi12:30:222:30:205:446:07
6:00
#153
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi116116116136(Top 0.5%)111(Top 0.7%)111(Top 2%)
10K6.21 mi3.10 mi120-4120-4120-4140(Top 0.5%)115(Top 0.8%)115(Top 2%)
15K9.32 mi3.11 mi126-6109+11109+11136(Top 0.5%)111(Top 0.7%)111(Top 2%)
20K12.43 mi3.11 mi127-1109109131(Top 0.5%)112(Top 0.7%)112(Top 2%)
Half13.11 mi0.68 mi126+1108+1108+1151(Top 0.6%)131(Top 0.9%)131(Top 2%)
25K15.53 mi2.42 mi133-7115-7115-7162(Top 0.6%)141(Top 0.9%)141(Top 3%)
30K18.64 mi3.11 mi137-4118-3118-3210(Top 0.8%)187(Top 1%)187(Top 4%)
20M20.00 mi1.36 mi139-2119-1119-1286(Top 1%)261(Top 2%)261(Top 5%)
21M21.00 mi1.00 mi146-7125-6125-6695(Top 3%)654(Top 4%)654(Top 12%)
35K21.75 mi0.75 mi149-3128-3128-3296(Top 1%)270(Top 2%)270(Top 5%)
23M23.00 mi1.25 mi150-1129-1129-1258(Top 1.0%)233(Top 2%)233(Top 4%)
24M24.00 mi1.00 mi146+4125+4125+4257(Top 1.0%)233(Top 2%)233(Top 4%)
40K24.85 mi0.85 mi150-4129-4129-4575(Top 2%)541(Top 4%)541(Top 10%)
25.2M25.20 mi0.35 mi152-2131-2131-21004(Top 4%)951(Top 6%)951(Top 18%)
Finish26.22 mi1.02 mi153-1132-1132-1716(Top 3%)684(Top 5%)684(Top 13%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 0.5%
×21story building
+97ft-345ft

Overall

136

Males

111

M18-39

111

5K→10K

3.1 - 6.2 mi

Top 0.5%
×5story building
+79ft-138ft

Overall

140

Males

115

M18-39

115

10K→15K

6.2 - 9.3 mi

Top 0.5%
×3story building
+67ft-78ft

Overall

136

Males

111

M18-39

111

15K→20K

9.3 - 12.4 mi

Top 0.5%
×5story building
+106ft-86ft

Overall

131

Males

112

M18-39

112

20K→Half

12.4 - 13.1 mi

Top 0.6%
×2story building
+19ft-37ft

Overall

151

Males

131

M18-39

131

Half→25K

13.1 - 15.5 mi

Top 0.6%
×4story building
+66ft-88ft

Overall

162

Males

141

M18-39

141

25K→30K

15.5 - 18.6 mi

Top 0.8%
×9story building
+181ft-148ft

Overall

210

Males

187

M18-39

187

30K→20M

18.6 - 20.0 mi

Top 1%
×5story building
+64ft-50ft

Overall

286

Males

261

M18-39

261

20M→21M

20.0 - 21.0 mi

Top 3%
×8story building
+106ft-24ft

Overall

695

Males

654

M18-39

654

21M→35K

21.0 - 21.8 mi

Top 1%
×7story building
+17ft-86ft

Overall

296

Males

270

M18-39

270

35K→23M

21.8 - 23.0 mi

Top 1.0%
×5story building
+23ft-63ft

Overall

258

Males

233

M18-39

233

23M→24M

23.0 - 24.0 mi

Top 1.0%
×6story building
+12ft-82ft

Overall

257

Males

233

M18-39

233

24M→40K

24.0 - 24.9 mi

Top 2%
×1story
+6ft-20ft

Overall

575

Males

541

M18-39

541

40K→25.2M

24.9 - 25.2 mi

Top 4%
×1story
+13ft-16ft

Overall

1004

Males

951

M18-39

951

25.2M→Finish

25.2 - 26.2 mi

Top 3%
×2story building
+22ft-21ft

Overall

716

Males

684

M18-39

684

Passing Analysis

Category:
Athletes Passed
41
Passed By
78
Net Change
-37
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#116
5K → 10K48-4#116#120
10K → 15K1218-6#120#126
15K → 20K34-1#126#127
20K → Half21+1#127#126
Half → 25K411-7#126#133
25K → 30K26-4#133#137
30K → 20M24-2#137#139
20M → 21M07-7#139#146
21M → 35K14-3#146#149
35K → 23M34-1#149#150
23M → 24M51+4#150#146
24M → 40K15-4#146#150
40K → 25.2M02-2#150#152
25.2M → Finish23-1#152#153
TOTALS4178-37
📊

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